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A D V A N C E   P R O G R A M M E    |   P R O G R A M M E   P R E L I M I N A I R E

Nice Acropolis, Nice, France

10-15 September 2000

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 . CLEO/Europe-IQEC 2000
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CLEO/Europe-IQEC Technical Program - TUESDAY

12 - 14 September, Nice Acropolis, Nice, France

 

MONDAY

TUESDAY

WEDNESDAY

THURSDAY

FRIDAY

TUESDAY POSTERS WEDNESDAY POSTERS THURSDAY POSTERS

 

ROOM 1
 
08:30 - 10:30
Session: Infrared Solid-State Lasers
Presider: Stefano Longhi, Politecnico di Milano, ITALY
 
 
CTuA1 8:30 - 9:00 (Invited)
Energy Transfer in Rare-Earth Doped Lasers, Willy Luethy, Heinz Weber, University of Bern, Bern, SWITZERLAND
Energy transfer in rare-earth doped crystal or glass lasers is studied to enhance the optical excitation efficiency or to control loss processes. Besides spectral sensitization also the spatial distribution of a sensitizer is discussed.
 
 
CTuA2 9:00 - 9:15
Repetitive Passive Q-Switched Diode Pumped Yb:Tm:LiYF4 Laser Around 1.5µm Using Various Saturable Absorbers, A. Braud, Michael Fromager, S. Girard, Richard Moncorge, Universite de Caen, Caen Cedex, FRANCE, Ph. Thony, B. Ferrand, CEA Grenoble/LETI, Grenoble Cedex, FRANCE
Yb:Tm:LiYF4 laser end-pumped with a 1W laser diode is investigated as efficient laser source at 1.5µm. Repetitive passive Q-switching using saturable absorbers such as Co:LaMgAl11O19 is demonstrated.
 
 
CTuA3 9:15 - 9:30
High Performance, Diode-Pumped, Q-Switched Er:Yb:Glass Laser with FTIR Shutter, E. Georgiou, FO.R.T.H. - I.E.S.L., Heraklio, Crete, GREECE, O. Musset, J.P. Boquillon, Universite de Bourgogne, Dijon Cedex, FRANCE
A compact portable diode-pumped bulk Er:Yb:Glass 1.54µm laser, using a Frustrated Total Internal Reflection (FTIR) Q-switch, delivers 49mJ / 30ns single pulses with 5% maximum optical slope efficiency and good beam quality.
 
 
CTuA4 9:30 - 9:45
High-Efficiency 880nm Diode Direct-Pumping of Nd:YVO4 Grazing Incidence Oscillators, Raphy Lavi, , Y. Tzuk, S. Jackel, Eyal Lebiush, I. Paiss, Soreq NRC, Yavne, ISRAEL, Merrill Apter, Coherent Semiconductor Group, Santa Clara, CA, USA
High efficiency 880nm diode side-pumping directly to the Nd:YVO4 upper lasing level is demonstrated 0.52 slope efficiency and 0.47 overall efficiency were obtained with M2=4 and 12 perpendicular and parallel to the pump k-vector.
 
CTuA5 9:45 - 10:00
High Repetition Rate End-Pumped Electro-Optic RTP Q-Switch Nd:YVO4 Laser, Eyal Lebiush, Raphy Lavi, Y. Tsuk, Soreq NRC, Yavne, ISRAEL, N. Angert, A. Gachechiladze, Raicol Crystals Ltd., Yahud, ISRAEL, M. Tseitlin, A. Zharov, College of Judea & Samaria, Ariel, ISRAEL, M. Roth, Hebrew University of Jerusalem, Jerusalem, ISRAEL
As up-to 75kHz repetition rate Nd:YVO4 laser with an RTP electro-optic Q-switch was developed. 4.6W average output power was achieved at 31% efficiency. The pulse width increased from 8.4nsec at 20kHz to 20nsec at 75kHz.
 
 
CTuA6 10:00 - 10:15
Er:Glass and Ho:YAG Lasers Passively Q-Switched with PbS(Se) Quantum Dot Saturable Absorbers, A.M. Malyarevich, I.A. Denisov, N.N. Posnov, V.G. Savitsky, P.V. Prokoshin, K.V. Yumashev, International Laser Center, Minsk, BELARUS, Andrey Lipovskii, E.V. Kolobkova, St. Petersburg Technical University, St. Petersburg, RUSSIA
Passive Q-switch operation of PbS- and PbSe-doped glasses as saturable absorbers for Er:glass and Ho:YAG lasers was demonstrated. Pulses of 110 ns in duration and 0.2 mJ inenergy at 1.54 µm as well as 60 ns and 22 mJ at 2.1 µm were obtained without intracavity focusing.
 
 
CTuA7 10:15 - 10:30
Spectroscopy, Gain and Laser Operation of Tm-Doped Monoclinic Crystals KY(WO4) and Kyb(WO4)2, Sergei Vatnik, Sergei Bagayev, A.P. Majorov, A.A. Pavlujk, Russian Academy of Sciences, Novosibirsk, RUSSIA
Spectroscopic measurements and a study of laser operation of monoclinic crystals KY(WO4)2+(1-15)%Tm have been performed. Under laser pumping of 800nm, the room temperature threshold of 70 mW and slope efficiency of 45 percent have been demonstrated for a 15%Tm-doped crystal.The tuning range extends over ~1850 to ~1950nm. Self-activated crystals Kyb(WO4)2+(3-7)%Tm have been studied under pump of 1064nm delivered by a free-running Nd:YAG laser, their estimated small signal gain is over 10 within the range 1820 to 1900nm.
 
11:00 - 13:00
Session: Visible and UV Solid State Lasers
Presider: Ernst Heumann, Universität Hamburg, GERMANY
 
 
CTuF1 11:00 - 11:15
Blue cw Nd:YAG Microchip Laser with Two Intra-Cavity Frequency Doublers, Volker Gaebler, Technische Universitaet Berlin, Berlin, GERMANY, Baining Liu, Hans Eichler, Technische Universitaet Berlin, Berlin, GERMANY, Zhiguo Zhang, Chinese Academy of Science, Beijing, CHINA
A microchip cavity including a half-monolithic Nd:YAG/KNbO3 chip and a second KNbO3 crystal with an output power up to 30 mW @ 473nm pumped by a 1W@808nm diode and an cw noise of less than 2% is presented.
 
CTuF2 11:15 - 11:30
Compact and Tunable UV-Visible Lasers Based on Ce-Doped Laser Crystals, M. Laroche, S. Girard, Richard Moncorge, Universite de Caen, Caen Cedex, FRANCE, Gregory Quarles, VLOC Incorporated, Tarpon Springs, FL, USA, J.Y. Gesland, Universite du Maine, Le Mans, FRANCE
Ce-doped LiSAF and LiLuF tunable lasers are pumped by very compact diode-pumped frequency quadrupled and quintupled pulsed Nd:YAG and Nd: YLF lasers and Raman shifted both in the UV and visible spectral domains.
 
 
CTuF3 11:30 - 11:45
Room-Temperature Continuous-Wave Er3+:LiLuF4 Upconversion Laser at 552nm, Sebastian Baer, Hanno Scheife, Ernst Heumann, Guenter Huber, Universitaet Hamburg, Hamburg, GERMANY
We report on crystal growth and room-temperature continuous - wave upconversion lasing of Er3+ :LiLuF4 at 552nm under TiAl2O3 pumping at either 810nm or 974nm. The maximum output power was 72m W at an absorbed pump power of 450m W.
 
 
CTuF4 11:45 - 12:00
High Power and High Energy Self-Frequency Doubling Nd3+-Doped YCOB Lasers, D.A. Hammons, Martin Richardson, Bruce Chai, University of Central Florida, Orlando, FL, USA, A.K. Chin, Polariod Corporation, Norwood, MA, USA
The development of diode-pumped and flashlamp-pumped self-frequency doubling Nd3+:YCa4O(BO3)3 crystal offers an attractive alternative to traditional intracavity doubling techniques using a separate nonlinear crystal. Here, we summarize our development of high power and high energy SFD lasers.
 
 
CTuF5 12:00 - 12:15
Tunable, Visible, High Repetition Rate, All-Solid-State Lasers, J.C. Diettrich, University of Otago, Dunedin, NEW ZEALAND, Iain McKinnie, Coherent Technologies, Inc., Boulder, CO, USA, Glenn Baxter, Don Warrington, University of Otago, Dunedin, NEW ZEALAND
Visible red-orange (586-666 nm) all-solid-state lasers based on intracavity frequency-doubling of Cr:forsterite in KTP are reported. 1-36 kHz repetition rate broadband and narrowband systems have been developed. Maximum conversion efficiency was 47%, the highest reported to date.
 
 
CTuF6 12:15 - 12:30
Simultaneous Generation of Continuous-Wave Green and Blue Laser Radiation by Multiple Self-Frequency Conversion in Aperiodically Poled Bulk LiNbO3:Nd3+ and LiNbO3:MgO:Yb3+, J. Capmany, Universidad Miguel Hernandez, Elche, SPAIN, V. Bermudez, David Callejo, J. Garcia Sole, E. Montoya, L.E. Bausa, Ernesto Dieguez, Universidad Autonoma de Madrid, Madrid, SPAIN
We present results of multiple self-frequency conversion in two aperiodically poled lithium niobate crystals containing rare-earth laser active ions. Simultaneous self-frequency doubling and self-sum frequency mixing is obtained in Nb3+ doped and Yb3+ doped lithium niobate crystals grown by the off-center Czochralski technique.
 
 
CTuF7 12:30 - 12:45
Single-Mode Source of Radiation, Tunable From 188.5 to 320 nm, Based on Coherent Mixing of Ti:Sapphire Laser Harmonics Radiation, A.A. Buj, A.V. Kachinsky, A.V. Ermakov, JV SOLAR TII, Minsk, BELARUS, A.S. Grabchikov, I.A. Khodasevich, Valentin Orlovich, National Academy of Sciences of Belarus, Minsk, BELARUS
Narrowband radiation tunable from 188.5 to 320 nm with energy exceeding 0.1 mJ at 188.5 was obtained at mixing Ti:Sapphire laser harmonics in KTP.
 
 
CTuF8 12:45 - 13:00
Raman Laser for Sodium Laser-Guide-Star, Petr Zverev, Maxim Doroshenko,Tasoltan Basiev, General Physics Institute, Moscow, RUSSIA
New barium tungstate crystal was propsed for developing efficient solid state Raman lasers. The second Stokes component of frequency doubled Nd:GGG pump laser radiation was demonstrated to fit well the sodium absorption line and can be used for sodium star.
 
 
16:00 - 18:30
Session: Novel Fibre and Waveguide Devices
Presider: W. Andrew Clarkson, University of Southampton, Southampton, UK
 
 
CTuM1 16:00 - 16:30 (Invited)
Novel Properties of Silica-Air Microstructured Fibers, Robert Windeler, Lucent Technologies, Murray Hill, NJ, USA
Microstructured optical fibers differ significantly from conventional waveguides, exhibiting properties that cannot be obtained from standard fibers. We discuss the properties of a variety of microstructured fibers for lasers and amplifiers applications as well as possible future directions.
 
 
CTuM2 16:30 - 16:45
Propagation and Compression of High Power Parabolic Pulses Generated in a High Gain Yb:Doped Fibre Amplifier, Martin Fermann, IMRA America, Inc., Ann Arbor, MI, USA, B.C. Thomsen, V.I. Kruglov, John Dudley, J.D. Harvey, University of Auckland, Auckland, NEW ZEALAND
A high gain Yb:doped fiber amplifier is used to generate parabolic pulses which are analyzed using frequency-resolved optical gating. After self-similar propagation in standard optical fiber and pulse compression, 70 fs pulses with 80 kW peak power are generated.
 
CTuM3 16:45 - 17:00
Intracavity Raman-Pumped Ho3+-Doped Silica Fibre Laser, Stuart Jackson, Australian Photonics CRC, Eveleigh, NSW, AUSTRALIA
We introduce the method of intracavity Raman pumping of lanthanide-doped fibre lasers. As an example, calculations and experiments relating to CW operation of a Ho3+-doped silica fibre laser that is intracavity pumped with 1st Stokes radiation will be presented.
 
 
CTuM4 17:00 - 17:15
New Generation of Raman Fiber Lasers, Based on Phosphosilicate Fibers, E.M. Dianov, I.A. Bufetov, M.M. Bubnov, M.V. Grekov, S.A. Vasiliev, O.I. Medvedkov, Russian Academy of Sciences, Moscow, RUSSIA
P-doped silica fiber based Raman lasers can serve as effective sources of radiation at any preassigned wavelength in the range (1.12÷1.6)µm using not more than 3 Raman cascades. The 1407nm 1W Raman laser was developed using the generation of Stokes components of essentially different frequency shifts.
 
 
CTuM5 17:15 - 17:45 (Invited)
Fiber DFB Lasers for Sensor Applications, Jon Thomas Kringlebotn, Optoplan AS, Trondheim, NORWAY
The characteristics of fibre DFB lasers and experimental results obtained using such lasers in various sensor applications will be presented, both as single and dual polarisation sensor elements and as sources for interrogation of interferometric sensors.
 
 
CTuM6 17:45 - 18:00
Ion-Exchanged Nd:Glass Tapered Waveguide Laser, S.J. Hettrick, J.I. Mackenzie, R.D. Harris, James Wilkinson, , A.C. Tropper, D.P. Shepherd, University of Southampton, Southampton, UK
We report an efficient (>40% slope) and low threshold (~10m W) ion-exchanged Nd:Glass tapered waveguide laser with near-diffraction-limited output. This structure is compatible with high power, broad-stripe, diode pumping.
 
 
CTuM7 18:00 - 18:15
Preparation and Lasing of a Novel Crystalline T-Waveguide Structure, Hanno Scheife, Sebastian Baer, P. Rogin, Klaus Petermann, Guenter Huber, Universitaet Hamburg, Hamburg, GERMANY
A T-shaped structure of two Nd3+:LiYF4 layers buried in LiYF4 was prepared by liquid-phase epitaxy forming a channel waveguide along the intersection of the two active layers. In this channel, lasing was demonstrated at 1047 nm.
 
 
CTuM8 18:15 - 18:30
Nd:LaF3 Channel Waveguide Lasers Fabricated by Molecular Beam Epitaxy, T. Bhutta, D.P. Shepherd, University of Southampton, Southampton, UK, C. Serrano, Emmanuelle Daran, LAAS - CNRS, Toulouse, FRANCE
We report the first laser operation of slab-loaded channel waveguides based on Nd:LaF3 thin films grown by molecular beam epitaxy. Two different methods of channel fabrication in this low phonon energy material are discussed.
 
 
ROOM 2
 
08:30 - 10:30
Session: Propagation in Photonic Crystals
Presider: Jim Fleming, Sandia National Laboratories, NM, USA
 
JSTuA1 8:30 - 9:00 (Invited)
Properties and Applications of Photonic Crystal Fibres, Jonathan Knight, Tim Birks, Philip Russell, University of Bath, Bath, UK
The enhanced optical response of two-dimensionally microstructured silica has enabled the development of a range of new optical waveguides-photonic crystal fibres. We describe some of the waveguiding characteristics and applications of these structures.
 
 
JSTuA2 9:00 - 9:15
Waveguiding at 1550nm in Planar Photonic Crystal Circuits, Dusan Nedeljkovic, Corning S.A., Avon, FRANCE, Marko Loncar, Theodor Doll, Axel Scherer, California Institute of Technology, Pasadena, CA, USA, Jurriaan Gerretsen, Thomas Pearsall, Corning S.A., Avon, FRANCE
Planar waveguide circuits including sharp corners with a bending radius less than 1 micron are demostrated at 1550 nm wavelength in silicon waveguides on silicon dioxide substrates. Planar guiding is achieved by a photonic crystal structure while guiding in the vertical direction is achieved by refractive confinement.
 
JSTuA3 9:15 - 9:30
Spectroscopy of Photonic Crystals, P. Kramper, J. Mlynek, Vahid Sandoghdar, Universitaet Konstanz, Konstanz, GERMANY, A. Birner, R. Wehrspohn, J. Schilling, Ulrich Goesele, Max-Planck-Inst f. Microstr. Physics, Halle, GERMANY
We have performed spectroscopy on photonic crystals that contain spatial defects. The structures are made of macroporous silicon and show a resonance within the band gap region of 3-5.5µm.
 
JSTuA4 9:30 - 9:45
Angular Dependence of the Stopband of an Inverse Opal Structure, G. J. Harrison, J.M. Arnold, N.P. Johnson, University of Glasgow, Glasgow, UK
The photonic bandgap for an inverse opal structure consisting of air spheres in titanium dioxide was measured by opitcal reflectance. The results agree with calculations using the transfer matrix method at several angles of incidence.
 
 
JSTuA5 9:45 - 10:00
Negative Permeability from Split Ring Resonator Arrays, David Smith, Willia Padilla, David Vier, Syrus Nemat-Nasser, Sheldon Schultz, UCSD, La Jolla, CA, USA
Arrays of conducting Split Ring Resonators (SRRs) have been predicted to exhibit large, and even negative, effective permeabilities for time-varying electromagnetic fields. We present the results of confirming numerical simulations and microwave experiments on SRRs.
 
JSTuA6 10:00 - 10:30 (Invited)
Design, Fabrication and Properties of Infrared, 3-D, Silicon Photonic Lattices, Jim Fleming, Shawn-Yu Lin, Sandia National Laboratories, Albuquerque, NM, USA
Using Si fabrication process we have created 3-D silicon photonic lattices with bandgaps centered frm 12µ down to 1.1µ, depending on pitch. This ability has prompted us to experimentally investigate different designs.
 
 
11:00 - 12:00
Session: Three-Dimensional Photonic Crystals
Presider: W.J. Wadsworth, University of Bath, UK
 
 
JSTuB1 11:00 - 11:30 (Invited)
Lattice Modulation of Auto-Cloned Photonic Crystals, Shojiro Kawakami, Yasuo Ohtera, Takayuki Kawashima, Takashi Sato, Tohoku University, Aoba-ku, Sendai-shi, JAPAN
Autocloning is a flexible versatile technology of photonic-crystal fabrication. We propose and demonstrate further enhancement of flexibility: the lattice constant(s) and crystal axis can be either gradually or abruptly modulated.This additional freedom enables several novel applications.
 
 
JSTuB2 11:30 - 11:45
Photonic Crystals for the Visible Spectrum by Holographic Lithography, D.N. Sharp, University of Oxford, Oxford, UK, A.J. Turberfield, M. Campbell, R.J. Denning, University of Oxford, Oxford, UK
We describe the fabrication of three-dimensional photonic crystals with sub-micron periodicity by holographic lithography. Photonic crystals made of polymer and of titania have been characterized by scanning electron microscopy and by optical diffraction.
 
 
JSTuB3 11:45 - 12:00
Near- and Mid-Infrared Yablonovite Structures Fabricated in PMMA by X-ray Lithography, C. Cuisin, D. Chelnokov, Universite Paris-Sud, Paris Orsay, FRANCE, Y Chen, D. Decanini, CNRS, Bagneux, FRANCE, J-M. Lourtioz, Universite Paris-Sud, Orsay Cedex, FRANCE
We describe the fabrication of 10 periods thick Yablonovite photonic microstructures by high resolution X-ray lithography. The results of first optical characterizations are compared to the results of simulations. Filling with high-indice material is considered.
 
 
12:00 - 13:00
Session: Quantum Cascade Lasers
Presider: Julien Nagle, Thomson CSF LCR, FRANCE
CTuJ1 12:00 - 12:15
First- and Second-Order Distributed Feedback AlGaAs/GaAs Quantum Cascade Lasers, Werner Schrenk, Norman Finger, Stefan Gianordoli, Lubos Hvozdara, Gottfried Strasser, E. Gornik, Technische Universitaet Wien, Vienna, AUSTRIA
We fabricated first- and second order distributed feedback quantum cascade lasers, based on the AlGaAs/GaAs material system. This mid infrared lasers are single mode emitters. The second-order lasers are efficient surface emitters with low beam divergence.
 
 
CTuJ2 12:15 - 12:30
Surface-Grating Coupled Quantum Cascade Laser Structures, Norman Finger, Werner Schrenk, E. Gornik, Technische Universitaet Vienna, Vienna, AUSTRIA
An accurate analysis of quantum cascade laser strctures incorporating metallized surface-relief gratings is presented, showing that both strongly somplex-coupled first-order and efficient second - order surface - emitting distributed-feedback lasers with almost on parasitic emission into the substrate can be realized.
 
 
CTuJ3 12:30 - 12:45
A Quantum Cascade Laser Using a Native-Oxide-Defined Current Aperture and Optical Waveguide, Corrie Farmer, University of Glasgow, Glasgow, UK, P.T. Keightley, University of Sheffield, Sheffield, UK, C.N. Ironside, Colin Stanley, University of Glasgow, Glasgow, Scotland, UK, L. R. Wilson, J. W. Cockburn, University of Sheffield, Sheffield, UK
We report a quantum cascade laser in which electrical and optical confinement is provided using the native oxide of the AlInAs upper cladding. Initial results include a reduced temperature dependence of the threshold current density.
 
CTuJ4 12:45 - 13:00
Terahertz-Quantum-Cascade Emitters: Interwell Versus Intrawell Transitions, Jochen Ulrich, Gottfried Strasser, K. Unterrainer, E. Gornik, Technische Universitaet Wien, Wien, AUSTRIA
We present electroluminescence measurements on terahertz-quantum-cascade emitters. Spontaneous intersubband emission from interwell transitions exhibits a Stark-shift. It is characterized by a higher quantum efficiency and a broader linewidth compared to intrawell emission.
 
 
16:00 - 17:30
Session: Optical Measurement Technologies: Devices and Technology
Presider: Jean-Pierre Cariou, ONERA/DOT/LOE, FRANCE
 
CTuL1 16:00 - 16:15
Single Photon Counting for 1300 - 1600nm Using Peltier Cooled and Passively Quenched InGaAs Avalanche Photodiodes, John Rarity, Thomas Wall, K. Ridley, P.R. Tapster, Defense Evaluation & Research Agency, Malvern, Worcestershire, UK
We review the performance of various commercially available InGaAs/ InP avalanche diodes for photon counting in the infro-red using Peltier cooling to 220K. Noise equivalent powers reaching 10-15 W/Hz1/2 can be reached in selected devices.
 
 
CTuL2 16:15 - 16:30
Ultra-Stable Solid-State Lasers for Space Applications, Peter Huebner, M. Peterseim, Laser Zentrum Hannover e.V., Hannover, GERMANY, I. Freitag, InnoLight GmbH, Hannover, GERMANY, C. Fallnich, Laser Zentrum Hannover e.V., Hannover, GERMANY, K. Danzmann, Universitat Hannover, Hannover, GERMANY, H. Welling, Laser Zentrum Hannover e.V., Hannover, GERMANY
We report about the development of a space qualified laser system based on a monolithic non-planar Nd:YAG ring oscillator. The system can be used for satellite-based measurements of wind velocities or a gravitational wave detector in space.
 
 
CTuL3 16:30 - 16:45
Use of Super Luminescence Diodes in Absolute Temperature Measurement, M. Naci Inci, Sabanci University, Tuzla, Istanbul, TURKEY, Toshihiko Yoshino, Gunma University, Kiryu, Gunma, JAPAN
A super luminescence diode illuminates a tantalum pentoxide film on the end-face of a single mode optical fiber. Temperature induced wavelength shift of the interference fringes of the film on reflection, appearing within the optical bandwidth of the diode, is used for absolute temperature measurement.
 
 
 
CTuL4 16:45 - 17:00
New High Energy and MHz Frequency Stabilised Light Source with 18 KHz Repetition Rate for Spectroscopy, M. Laubscher, Patricia Segonds, C. D'Orgeville, D. Mueller, R. Soden, J. L. Cheval, J. P. Pique, Universite Joseph Fourier, St Martin d'Heres, FRANCE
We present a pulsed high energy and MHz frequency stabilised light source based on a CuHBr-pumped multipass dye-jet amplifier, coupled with a cw dye laser. Gains fo 104 were obtained. Amplified Spontaneous Emission is negligible.
 
 
CTuL5 17:00 - 17:15
A Compact Sensor for Interferometric Displacement Measurements, Thomas Maier, E. Gornik, Technische Universitaet Wien, Wien, AUSTRIA
We developed a simple displacment sensor using the self-mixing effect in a single-mode vertical-cavity surface emitting laser. The interferometric signal is measured with a resonant photodetector which is monolithically integrated with the laser.
 
 
CTuL6 17:15 - 17:30
Novel Wavefront Sensor for Optical Space Communications, Werner Klaus, Klaus Kudielka, Communications Research Lab, Koganei, Tokyo, JAPAN, Yoshinori Arimoto, National Space Development Agency of Japan, Ibaraki, JAPAN, Kenichi Araki, Communications Research Lab, Tokyo, JAPAN
A waveguide array operating as a compact wavefront sensor for space laser links using adaptive optics has been designed and manufactured. First experiments showed that closed-loop operation together with a deformable mirror can be achieved.
 
17:30 - 18:30
Session: Tutorial 4
 
TUT41 17:30 - 18:30
European Commission Programmes in Optoelectronics, Lasers and Optics, Henri Rajbenbach
Abstract not Available
 
ROOM 4
 
08:30 - 10:30
Session: Dynamics of Diode Lasers
Presider: Daan Lenstra, Vrije Universiteit, THE NETHERLANDS
 
 
CTuB1 8:30 - 8:45
Ultrashort Multiple-Quantum-Well Lasers with Extremely Broad Spectrum: Towards Femtosecond Superradiant Lasing, N.G. Kalugin, Swiss Federal Institute of Technology, Lausanne, SWITZERLAND, Alex Belyanin, Texas A&M University, College Station, TX, USA, B. Deveaud, Swiss Federal Institute of Technology, Lausanne, SWITZERLAND, V.V. Kocharovsky, Texas A&M University, College Station, TX, USA, VI. V Kocharovsky, Russian Academy of Sciences, Nizhny Novgorod, RUSSIA
We present experimental results and theoretical analysis of extremely broad-band multi-mode generation of very short (10-20 µm) GaAs heterolasers with 10 to 40 quantum wells and show that this opens the way to femtosecond superradiant lasing.
 
CTuB2 8:45 - 9:00
10 Gbit/s Directly Modulated GaInPAs and GaInAlAs Semiconductor Ridge Lasers up to 85C at 1310 nm, Kenton White, A.J. SpringThorpe, T. Garanzotis, P. Paddon, Nortel Networks, Ottawa, ON, CANADA
We present recent results showing 10 Gbit/s operation of GaInPAs and GaInAlAs 1310 nm semiconductor ridge lasers up to temperatures of 85C.
 
CTuB3 9:00 - 9:30 (Invited)
Femtosecond Dynamics of Active Semiconductor Waveguides - Microscopic Analysis and Experimetnal Investigations, A. Volland, G. Jennemann, Ingo Fischer, Wolfgang Elsaesser, Darmstadt University of Technology, Darmstadt, GERMANY, Edeltraud Gehrig, DLR - Institute of Optoelectronics, Stuttgart, GERMANY, Ortwin Hess, DLR - Institute of Technical Physics, Stuttgart, GERMANY
The coherent and incoherent physical processes occuring during the propagation of an optical fs pulse in an active waveguide structure are theoretically analyzed with space-dependent Maxwell-Bloch-Langvin-equations. The calculation properties are verified by experimental results of a pump-probe setup.
 
CTuB4 9:30 - 9:45
Synchronization of Chaotic Self-Pulsating Laser Diodes, Robin Jones, University of Wales, Bangor, Bangor, Wales, UK, A. Valle, Instituto de Fisica de Cantabria, Santander, SPAIN, Paul Rees, Paul Spencer, University of Wales, Bangor, Bangor, Wales, UK, J. Revuelta, Luis Pesquera, Instituto de Fisica de Cantabria, Santander, SPAIN, K. Alan Shore, University of Wales, Bangor, Bangor, Wales, UK
We examine the effect of noise and phase-amplitude coupling of the electric field on the quality of synchronisaton of two chaotic CD laser diodes.
 
CTuB5 9:45 - 10:00
Observation of Inverse Synchronization in Chaotic Diode Lasers, S. Sivaprakasam, University of Wales, Bangor, Bangor, Wales, UK, K. Alan Shore, University of Wales, Bangor, Bangor, Wales, UK
Optical coupling is used to effect synchronisation between two diode lasers. Conditions are found where the synchronisation diagram exhibits a negatice gradient which we term as inverse synchronisation.
 
 
CTuB6 10:00 - 10:15
Modeling of Filtered External Optical Feedback in a Semiconductor Laser and Comparison with Experiment, Mirvais Yousefi, Ole Andersen, Vrije Universiteit, Amsterdam, THE NETHERLANDS, Alexis Fischer, Universite Paris, Villetaneuse, FRANCE, Steven Stolte, Daan Lenstra, Vrije Universiteit, Amsterdam, THE NETHERLANDS
An optical system exhibiting multistability and hysteresis based on frequency-filtered optical feedback in a diode laser is presented. The experimental observations are explained using modified single-mode Lang-Kobayashi rate equations.
 
CTuB7 10:15 - 10:30
Side-Mode Resonance in a Fabry-Perot Semiconductor Laser with Intermodal Injection, Y. Hong, University of Wales, Bangor, Bangor, Wales, UK, K. Alan Shore, University of Wales, Bangor, Bangor, Wales, UK, J.S. Lawrence, D.M. Kane, Macquarie University, Sydney, NSW, AUSTRALIA
A side-mode resonance regime is found in a semiconductor laser with intermodal injection. Nearly degenerate four wave mixing is also observed for both positive and negative detunings at low to medium injection levels.
 
 
11:00 - 13:00
Session: VCSEL Dynamics and Integration
Presider: Ian White, University of Bristol, Bristol, UK
 
 
CTuG1 11:00 - 11:30 (Invited)
Large Signal Modulation Performance of Red Vertical Cavity Surface Emitting Lasers, Anita Risberg, C. Runnstroem, M. Dubois, Rickard Marcks von Wuertemberg, M. Ghisoni, B. Kronlund, Mitel Semiconductor, Jaerfaella, SWEDEN, R. Stevens, Royal Institute of Technology, Kista, SWEDEN
We present results on the large signal modulation performance of visible vertical cavity surface emitting lasers (VCSELs) operating at 670nm. Eye diagrams taken up to 2 Gbps show excellent performance characteristics.
 
 
CTuG2 11:30 - 11:45
Single- and Multi-Mode VCSELs dor 12.5 Gb/s Data Links, M. Kicherer, R. Jaeger, R. King, Felix Mederer, H.J. Unold, Karl Ebeling, University of Ulm, Ulm, GERMANY
Vertical-cavity lasers at 850 and 980 nm emission wavelength, designed and fabricated for high speed operation, are used for 12.5 Gb/s data transmission. Relative intensity noise and small signal modulation measurements on single- and multi-mode devices, show corresponding 3dB bandwidths of 9GHz.
 
CTuG3 11:45 - 12:00
Mode Stabilized Oxide Confined VCSELs with Improved Dynamic Range Under Analog Modulation, C. Carlsson, Hans Martinsson, Josip Vukusic, Halonen, Anders Larsson, Chalmers University, Goeteburg, SWEDEN
The transverse mode properties of oxide confined VCSELs can be controlled using a shallow surface relief. Singlemode operation results in reduced nonlinear distortion and noise and therefore an improved dynamic range under analog modulation.
 
 
CTuG4 12:00 - 12:15
The Effect of In-Plane Uniaxial Strain on Polarization Switching in Vertical-Cavity Surface-Emitting Lasers, Krassimir Panajotov, Institute of Solid State Physics, Brussels, BELGIUM, Guy Verschaffelt, J. Albert, Bob Nagler, Michael Peeters, Jan Danckaert, Irina Veretennikoff, Hugo Thienpont, Vrije Universiteit Brussel, Brussels, BELGIUM
We demonstrate experimentally that polarisation switching between two fundamental VCSEL modes is determined both by the magnitude and the orientation of uniaxial in-plane strain. This is explained by introducing different gain curves for each polarisation.
 
CTuG5 12:15 - 12:30
Polarization Selection in VCSELs: Influence of Gain Dynamics, Spin Dynamics and Thermal Shift, Josep Mulet, Salvador Balle, Claudio Mirasso, Maxi San Miguel, Universidad de las Islas Baleares, Palma de Mallorca, SPAIN, E. Tolkachova, J.R. Tredicce, Institut Non Lineaire de Nice, Valbonne, FRANCE
We discuss two independent mechanisms pf polarization switching in vertical-cavity surface-emitting lasers within a mesoscopic model including analytical expressions for the quantum-well susceptibility. Transverse effects in gain-guided VCELs are considered.
 
CTuG6 12:30 - 12:45
Diode-Pumped Broadband Vertical-External-Cavity Surface-Emitting Semiconductor Lasers. Design and Applications, Amaud Gamache, A.C. Tropper, University of Southampton, Southampton, UK, A. Kachanov, D. Romanini, Frederic Stoeckel, Universite Joseph Fourier, Saint Martin d'Heres Cedex, FRANCE, R. Planel, Lab de Microstructures & Microelectronique, Bagneux Cedex, FRANCE, V. Thierry-Mieg, Lab de Microstructures & Microelectronique, Bagneux Cedex, FRANCE, R. Houdre, EPFL, Lausanne, SWITZERLAND
We report high power, single frequency and ultra-short pulse operation of a newly developed Diode-Pumped External-Cavity Semiconductor Laser operating cw at room temperature; a source well suited for high sensitivity absorption.
 
 
CTuG7 12:45 - 13:00
Vertical Cavity Surface Emitting Lasers Integrated with Microlens Arrays, S. Eitel, CSEM Zuerich, Zuerich, SWITZERLAND, Stuart Fancey, J.J. Casswell, Heriot-Watt University, Edinburgh, UK, H.-P. Gauggel, Karlheinz Gulden, CSEM SA, Zurich, SWITZERLAND, Werner Baechtold, Swiss Federal Institute of Technology, Zurich, SWITZERLAND, Mohammad Taghizadeh, A.C. Walker, Heriot-Watt University, Edinburgh, UK
We report 8x8 vertical cavity surface emitting laser arrays with device parameters uniform to <+-3%. The devices emit 1.25mW at 956nm wavelength and have been integrated with microlenses to modify their divergence for system applications.
 
 
16:00 - 18:30
Session: Applications of Phase Conjugation & Wave Mixing
Presider: Arnaud Brignon, Thomson CSF LCR, FRANCE
 
 
CTuN1 16:00 - 16:30 (Invited)
Phase Conjugate Beam Steering Using a Multi-Pass Amplifier System with High Gain, A.M. Scott, Defense Research Agency, Malvern, Worcs., UK, A.P.G Davies, Defense Evaluation & Research Agency, Great Malvern, Worc., UK
Phase conjugation is used to control an output beam by steering a weak input beam. We demonstrate this using a 12-pass amplifier with a single pass gain of 2.5 and a system gain of 1000.
 
 
CTuN2 16:30 - 16:45
High-Average-Power Self-Starting Nd:YAG Laser with Cavity Completed by Self-Induced Refractive Index Gratings, Oleg Antipov, A.S. Kuzhelev, D. Chausov, Russian Academy of Sciences, Nizhny Novgorod, RUSSIA
A self-starting Nd:YAG laser with cavity completed by holographic grating induced by generating optical beams in a laser crystal was studied both experimentally and numerically. The capability for generating high average-power beams of good quality was demonstrated.
 
 
CTuN3 16:45 - 17:00
A Nd:YAG Laser with a Vectorial Phase Conjugate Mirror in the Gain Medium, M. Ouhayoun, None, Paris, FRANCE, M. Boucher, O. Musset, J.P. Boquillon, Universite de Bourgogne, Dijon Cedex, FRANCE
A flash-lamp pumped, pulsed Nd:YAG laser can be transformed into an efficient phase conjugate resonator by using vectorial four wave mixing in the gain medium.
 
 
CTuN4 17:00 - 17:15
Self-Starting Phase-Conjugate Laser With Dynamic Liquid-Crystal Holographic Mirror, A.P. Zinov'ev, A.S. Kuzhelev, Oleg Antipov, Russian Academy of Sciences, Nizhny Novgorod, RUSSIA
A self-starting laser with a holographic non-linear mirror based on nematic liquid crystal cell is studied experimentally and numerically. The dynamic mirror was induced by generating waves in the nematic liquid crystal with orientational and thermal nonlinearity.
 
 
CTuN5 17:15 - 17:30
Liquid Crystal Media and Devices as Real-Time Holographic Recording Media for Large Aberration Compensation, Mark Gruneisen, Ty Martinez, Air Force Research Laboratory, Kirtland AFB, NM, Jeffery Baker, Boeing North America Inc., Albuquerque, NM, USA, Kenneth MacDonald, Boeing, Albuquerque, NM, USA
Real-time holography compensates for severe dynamic aberrations exceeding the capabilities of conventional deformable mirrors. New liquid-crystal based electro-optical phase modulators provide a combination of speed and sensitivity that is superior to that of nonlinear optical media.
 
 
CTuN6 17:30 - 17:45
Experiment on All-Optical Switch with Photorefractive Duplex Two-Wave Mixing, Satoshi Honma, Hokkaido University, Sapporo, JAPAN, Atsushi Okamoto, Hokkaido University, Sapporo, JAPAN, Kunihiro Sato, Hokkai-Gakuen University, JAPAN
We have proposed an all-optical switch with photorefractive duplex two-wave mixing. The present research deals with the measurement of the switching property and its comparison with theoretical results.
 
 
CTuN7 17:45 - 18:00
Contrast-Enhanced, Amplified Optical Imaging by Photorefractive Recycling, Robert Boyd, John Heebner, University of Rochester, Rochester, N ew York
High-pass filtering is an effective, although energy-inefficient method of image processing for contrast enhancement. We demonstrate a technique for enhancing image contrast in an energy efficient manner by using photorefractive two-beam coupling to recycle the optical power ordinarily discarded.
 
 
 
CTuN8 18:00 - 18:15
Micron Resolution In-Depth Reflectance Measurements with Super Lumiscent Diode and Photo-ElectroMotiveForce Adaptive Detector, M.L. Arroyo Carrasco, P. Rodriguez Montero, S. Stepanov, INAOE, Puebla, MEXICO
Original experimental data on micron resolutions in-depth measurements of reflectance by adaptive photo-EMF detector and low coherence light source (SLD) are presented. Influence of the beam crossing angle on longitudinal spatial resolution of the technique are discussed.
 
 
CTuN9 18:15 - 18:30
Electrically Controlled Specrtal Filters Based on Volume LiNbO3 Holograms, Victor Petrov, Cornelia Denz, Darmstadt University of Technology, Darmstadt, GERMANY, A.V. Shamray, A.F. Ioffe Physicotechnical Institute, St. Petersburg, RUSSIA, Theo Tschudi, Darmstadt University of Technology, Darmstadt, GERMANY, M.P. Petrov, A.F. Ioffe Physicotechnical Institute, St. Petersburg, RUSSIA
The technique of electrically controlled light diffraction from volume holograms is very suitable for development of tunable and switchable spectral filters. Experimental investigations of electrically controlled spectral filters using holograms recorded in LiNbO3 are reported.
 
 
ROOM 5
 
08:30 - 10:30
Session: High Intensity Ultrashort Pulse Amplification
Presider: Georg Korn, Max-Born Institute, GERMANY
 
 
CTuC1 8:30 - 9:00 (Invited)
Producing Focused Intensity of 3 x 1018 W/cm2 With a 1kHz Laser, Olivier Albert, Ecole Polytechnique, Palaiseau, FRANCE, H.-W. Wang, D. Liu, G. Mourou, Z. Chang, University of Michigan, Ann Arbor, MI, USA
The output of a 21 fs, 0.7 mJ, 1 kHz laser was focused to 1.2 micrometer spot by a f/1 parabola. The waterfront distortion was compenstated using a deformable mirrror optimized by an evolutionary algorithm.
 
 
CTuC2 9:00 - 9:15
Multijoule Ultrashort Femtosecond Pulse Laser at 10 Hz Repetition Rate, S. Ferre, Ecole Polytechnique - ENSTA, Palaiseau, FRANCE, Gilles Cheriaux, J.P Rousseau, LOA-ENSTA, Palaiseau , FRANCE, S. Ranc, M. Zavelani-Rossi, A. Chiron, Ecole Polytechnique - ENSTA, Palaiseau , FRANCE, J.P. Chambaret, LOA-ENSTA, Palaiseau, FRANCE, L. Vigroux, Thomson CSF Laser, Orsay, FRANCE
The amplification, in Titanium doped sapphire, of femtosecond pulses of energy up to 3.5 Joules at 10 Hz will be shown. We will discuss the control of the thermal effects in such laser systems.
 
 
CTuC3 9:15 - 9:30
Hybrid Compressor for Terawatt Level Laser Chain, Gilles Cheriaux, J.P. Rousseau, J.P. Chambaret, Ph. Balcou, LOA-ENSTA, Palaiseau, FRANCE, V. Laude, L. Vigroux, Thomson CSF LCR, Orsay, FRANCE
Chirped mirrors have been used for the final compression of Terawatt level femtosecond pulse in order to avoid the use of a compressor in the vacuum and its relevant problems.
 
 
CTuC4 9:30 - 9:45
Spectral Amplitude and Phase Control in a CPA Laser System Using Adaptive Optics in the Stretcher, Olivier Albert, V. Waenman, C. Felix, Ecole Polytechnique, Palaiseau, FRANCE, Gilles Cheriaux, J.P. Chambaret, LOA-ENSTA, Palaiseau, FRANCE, J. Queneuille, G. Mourou, University of Michigan, Ann Arbor, MI, USA
We present a CPA system that corrects gain narrowing to get pulses under 20fs and the implementation of a deformable mirror in the stretcher to correct the residual spectral phase down to 0.4rad pick to valley. The deformable mirror is part of a close loop using the measured spectral phase out of a SPIDER.
 
 
CTuC5 9:45 - 10:00
Dispersion Compensation Over 200 THz in the Visible Using Only Chirped Mirrors in an Optical Parametric Amplifier, Giulio Cerullo, M. Zavelani-Rossi, Sandro De Silvestri, Politecnico di Milano, Milano, ITALY, G. Angelow, Volker Scheuer, Theo Tschudi, Darmstadt University of Technology, Darmstadt, GERMANY, L. Gallmann, N. Matuschek, D.H Sutter, Gunter Steinmeyer, Ursula Keller, Swiss Federal Institute of Technology, Zurich, SWITZERLAND
Double-chirped mirrors with custom-tailored dispersion characteristics over a bandwidth of 200 THz in the visible are used to compress pulses from an ultrabroadband optical parametric amplifier to a transform-limited, 5.1-fs duration.
 
 
CTuC6 10:00 - 10:15
A Broad-Band, Ultra-Short Pulse Pre-Amplifier for Large Scale CPA Facilities, C. Hernandez-Gomez, John Collier, I.N. Ross, C.N. Danson, F. Budd, Rutherford Appleton Laboratory, Didcot, Oxfordshire, UK
We present details of a simple, single pass, high gain, ultra-broad band table top pre-amplifier suitable for large scale CPA laser system.
 
 
CTuC7 10:15 - 10:30
Novel Double-Pass, High-Gain, Ti:Sapphire CW-Amplifier Delivering 82-MHz Repetition-Rate, 5.77-W Average-Power, Femtosecond Pulses, Hidetoshi Murakami, Zhenlin Liu, Toshimasa Kozeki, Hideyuki Ohtake, Nobuhiko Sarukura, Institute for Molecular Science, Okazaki, JAPAN
Novel confocal double-pass, Ti: sapphire cw-amplifier with the 4.2 times small-signal gain and 10.6% extraction efficiency is successfully demostrated to deliver 5.77-W average-power, 82-MHz repetition rate, femtosecond pulses.
 
 
11:00 - 13:00
Session: Ultrashort Measurement Techniques: Characterization and Manipulation of Short Pulses
Presider: Ursula Keller, Swiss Federal Institute of Technology, SWITZERLAND
 
 
CTuH1 11:00 - 11:15
Spatially Resolved Full Characterization of Sub-10-fs Pulses Using SPIDER, Gunter Steinmeyer, L. Gallmann, Ursula Keller, Swiss Federal Institute of Technology, Zurich, SWITZERLAND, I.A. Walmsley, University of Rochester, Rochester, NY, USA
Based on spectral interferometry for direct electric field reconstruction (SPIDER), we demonstrate amplitude and phase characterization of sub-10-fs pulses with spatial resolution. This method is used to detect a spatial substructure of Ti:sapphire laser pulses.
 
 
CTuH2 11:15 - 11:30
Amplitude and Phase Measurement of Mid-IR Femtosecond Pulses Using XFROG, Derryck Reid, P. Loza-Alvarez, C.T.A. Brown, T. Beddard, Wilson Sibbett, University of St. Andrews, St. Andrews, Fife, UK
We describe a frequency-resolved optical gating technique for simultaneously measuring the amplitude and phase of two femtosecond pulses, one in the mid-infrared with a wavelength of 2.4 µm and the other with a wavelength of 835 nm.
 
 
CTuH3 11:30 - 11:45
Measurement of Ultrashort Pulse Amplitude and Phase by Rapidly Acquiring and Retrieving a Sonogram, I. Cormack, Wilson Sibbett, Derryck Reid, University of St. Andrews, St. Andrews, Fife, UK
By measureing the sonogram of an ultrashort pulse we have demonstrated a robust and sensitive characterisation method with acquisition rates as high as 0.5 Hz. Retrieved data are compared to independent experimental measurements.
 
 
CTuH4 11:45 - 12:00
Temporal Phase Shift Measurement in X(2) Cascading Process Using a Sonogram Technique, Sylvain Rivet, R. Barille, Lionel Canioni, L. Sarger, Universite Bordeaux 1, Talence, FRANCE
A frequency domain phase measurement technique (FDPM) coupled with a numerical chirp processing to realise a pulse characterisation is presented. The measurement of X(2) cascading is done and compared with simulations.
 
 
CTuH5 12:00 - 12:15
Design Parameters for the Acousto-Optic Programmable Filter Used in Femtosecond Laser Pulse Manipulation, F. Verluise, FASTLITE, Palaiseau Cedex, FRANCE, V. Laude, Thomson CSF LCR, Orday cedex, FRANCE, Pierre Tournois, FASTLITE, Palaiseau Cedex, FRANCE
Pulse shaping, amplitude and phase compensations have been demonstrated using an acousto-optic programmable dispersive filter (AOPDF). Design parameters such as : number of programming points, acoustical power density needed for a given diffraction efficiency, augular aperture... will be addressed.
 
 
CTuH6 12:15 - 12:30
Applications of Temporal Kerr Lensing to Signal Manipulation and Analysis, L. Mouradian, A. Zohrabyan, Yerevan State University, Yerevan, ARMENIA, A. Villeneuve, A. Yavrian, G. Rousseau, Michel Piche, Universite Laval, Cite Universitaire, CANADA, C. Froehly, F. Louradour, Alain Barthelemy, IRCOM, Limoges, FRANCE
The temporal analog of a lens has been performed by Kerr effect in a nonlinear fiber and its application to pulse shaping and characterization has been experimented at picosecond to few femtosecond time scales.
 
 
CTuH7 12:30 - 12:45
Feedback Control of Intense Femtosecond Pulses Using a Novel Spatial Light Modulator, Akira Suda, Inst of Physical & Chemical Research, Saitama, JAPAN, Yu Oishi, Science University of Tokyo, Tokyo, JAPAN, Pengqian Wang, Inst of Physical & Chemical Research, Saitama, JAPAN, Keigo Nagasaka, Science University of Tokyo, Tokyo, JAPAN, Katsumi Midorikawa, Inst of Physical & Chemical Research, Saitama, JAPAN
A novel spatial light modulator that consists of fused silica plates was developed and tested for feedback control of high-intensity femtosecond laser pulses over a wide range of spectrum.
 
 
CTuH8 12:45 - 13:00
Generation and Characterization of Intense Ultrashort Tunable Far-Infrared (30-250 µm) Laser Pulses, X. Yan, A.M. MacLeod, W.A. Gillespie, University of Abertay Dundee, Dundee, UK, G.M.H. Knippels, D. Oepts, A.F.G van der Meer, FOM Institute for Plasma Physics, Nieuwegein, THE NETHERLANDS
Intense rapidly tunable picosecond laser pulses have been generated from 30-250 µm. The bandwidth-limited and diffraction-limited laser pulses have energies of up to 17 µJ,and peak powers of more than 1 MW.
 
 
 
16:00 - 18:30
Session: Laser Micromachining
Presider: Miroslav Jelinek, Czech Academy of Sciences, CZECH REPUBLIC, Roland Oltra, Universite de Bourgogne, FRANCE
 
 
CTuO1 16:00 - 16:30 (Invited)
Laser Molecular Transfer: Applications and Fundamentals, Hiroshi Fukumura, Tohoku University, Sendai, JAPAN
Spatially-selective molecular transfer has been realized by using pulsed UV laser irradiation without impairing the original functionality of molecules. The fundamental mechanism of laser-induced molecular transfer and methods to prepare molecular patterns in sub-micrometer scale are presented.
 
 
CTuO2 16:30 - 16:45
Photoresistive Polymeric Materials for 157nm Photolithography, A.C. Cefalas, E. Sarantopoulou, National Hellenic Research Foundation, Athens, GREECE, E. Gogolides, P. Argitis, Institute of Microelectronics, Athens, GREECE
The absorption spectra and mass spectroscopy in the vacuum ultraviolet region of the spectrum from 140 to 200 nm, of various Si-based polymers and polymeric materials with linear and aromatic carbon structure in their molecular chain for 157 nm lithographic applications are discussed in this communication.
 
 
CTuO3 16:45 - 17:00
Fast Drilling of High Accuracy Micro Holes in Stainless Steel with DPSS Laser, Christoph Mehlmann, Sergej Govorkov, Evgueni Slobodtchikov, Alexander Wiessner, Dirk Basting, Lambda Physik Inc., Goettingen, GERMANY
We investigate the ablation rate of steel drilling micro holes as a function of intensity, wavelength and material thickness using a 10 kHz repetition rate DPSS laser at fundametnal, second and third harmonic.
 
CTuO4 17:00 - 17:15
Rapid Prototyping of Refractive Micro-Optics Using Slab Waveguide CO2 Lasers, H.J. Baker, Gavin Markillie, Francisco Villarreal, Qiusheng Cao, P.R. Murray, P.A. Field, K. Nowak, C. Janke, Denis Hall, Heriot-Watt University, Edinburgh, UK
Improvements in surface quality and machining accuracy for glass micromachining are reported through the use of an acousto-optic modulator for pulse width control of a CO2 slab waveguide laser.
 
 
CTuO5 17:15 - 17:30
Computer Aided Control of Laser Writing System for Fabricating Continuous-Relief Micro-Optical Elements, Yuen Chuen Chan, Chao Wang, C.Y. Liaw, , Yee-Loy Lam, Nanyang Technological University, SINGAPORE
A computer control program for a laser writing system, which takes into account the laser intensity variation and pattern design, has been developed for the fabrication of continous-relief micro-optical elements with minimal user monitoring.
 
 
CTuO6 17:30 - 17:45
Morphology and Kinetics of Surface Relief Gratings Formed by Laser-Induced Liquid/Solid Phase Transition on Solid Substrate, E. Hugonnot, A. Ducasse, Jean Pierre Delville, Universite Bordeaux 1, Talence cedex, FRANCE
We experimentally investigate film gratings by laser-induced liquid/solid phase transistions in photosensitive aqueous solutions, and we analyze the dynamic of the relief modulation by the temporal behavior of the full diffraction pattern.
 
 
CTuO7 17:45 - 18:00
Optically Assisted Chemical Surface Microstructuring of LiNbO3, Sakellaris Mailis, Graeme Ross, L. Reekie, J.A. Abernethy, I.E. Barry, R.W. Eason, University of Southampton, Southampton, UK, I. Nee, M. Mueller, Karsten Buse, Universitaet Osnabrueck, Osnabrueck, GERMANY
Optically assisted surface microstructuring of iron doped and undoped LiNbO3 based on preferential etching has been achieved by optical addressing, either laser induced surface damage or optically induced space charge field.
 
 
CTuO8 18:00 - 18:15
Debris Free Sub-µm Structuring of Arylazophosphonate Containing Polymers by XeCl Excimer Laser Ablation, F. Beinhorn, J. Ihlemann, Laser-Laboratorium Goettingen e.V., Goettingen, GERMANY, M.N. Nobis, O. Nuyken, Technical University of Munich, Garching, GERMANY
XeCl-laser ablation of a variety of poly(arylazophosphonate)s is found to be supported by photoinduced nitrogen generation. Submicron periodic structures without debris are formed by irradiation through a phase mask. Ablation rate measurements disclose structural dependence.
 
 
CTuO9 18:15 - 18:30
Intelligent 3-D Micro-Structuring with Imaging UV-Laser Systems, F. Von Alvensleben, Klaus Koerber, Christian Kulik, Laser Zentrum Hannover e.V., Hannover, GERMANY
Pulsed UV-laser system in combination with special machine concepts and processing strategies are used for high quality micro-structuring with a high flexibility. Modeling and controlling the process was investigated within the project AI416-5 of the DFG.
 
ROOM 6
 
08:30 - 10:30
Session: Nonlinearities in Semiconductors
Presider: Bernard Weiss, University of Surrey, Surrey, UK
 
CTuD1 8:30 - 9:00 (Invited)
Excitonic Optical Nonlinearities and Ultrafast Polarization Switching in Quantum Wells, Alan Miller, University of St. Andrews, St. Andrews, Fife, UK
Abstract not available.
 
 
CTuD2 9:00 - 9:15
60ps Recovery Time in an InGaAsP Quaternary Multiple Quantum Well Saturable Absorber Employing Carrier Sweep-Out, Ed Burr, J. Song, A.J. Seeds, University College London, London, UK, Chris Button, University of Sheffield, Sheffield, UK
We describe the first observations of fast recovery in an InGaAsP quaternary multiple quantum well saturable absorber using electric field induced carrier sweep-out. An 133kV/cm sweep-out field reduces the recovery time from 3.9ns to 60ps.
 
 
CTuD3 9:15 - 9:30
All-Optical Switching and XOR-Gating Using Cross-Polarization Modulation in a Semiconductor Optical Amplifier, Didier Erasme, Ecole Nationale Superieure des Telcom, Paris, FRANCE, Horacio Soto, CICESE, Ensenada, Baja California, MEXICO, G. Guekos, Swiss Federal Institute of Technology, Zurich, SWITZERLAND
Cross-polarisation modulation in semiconductor optical amplifiers represents an efficient mean for processing optical signals. An all-optical switch and a XOR gate have been demonstrated at rates of 2.5 Gbit/s and above.
 
 
CTuD4 9:30 - 9:45
Features of a Semiconductor Optical Amplifier/Saturable Absorber Module in Signal Transmission Lines, Christian Knoell, M. Goelles, Z. Bakonyi, G. Onishchukov, Falk Lederer, Friedrich-Schiller-Universitaet - Jena, Jena, GERMANY
A semiconductor optical amplifier/ saturable absorber module provides gain as well as noise supression in high bit rate transmission lines. Analytical expressions for maximixing the transmission capacity are derived. The predictions are confirmed by experiments.
 
 
 
CTuD5 9:45 - 10:00
Solitons in Electro-Optic Modulators, Ulf Peschel, Falk Lederer, Friedrich-Schiller-Universitaet - Jena, Jena, GERMANY, K. Bubke, David Hutchings, University of Glasgow, Glasgow, UK
We show the formation of bound states of optical pulses and microwave signals due to optical rectification and the electro-optic effect. The interaction between electrical signals and optical pulses will be discussed.
 
 
CTuD6 10:00 - 10:15
All-Semiconductor Miniature Nonlinear Optical Loop Mirrors for GHz All-Optical Switching Operation, Jiun-Haw Lee, Chih-Yang Wang, Yean-Woei Kiang, C. C. Yang, National Taiwan University, Taipei, TAIWAN, R.O.C.
All-optical self-switching and cross-switching with picosecond signals in monolithic all-semiconductor-optical-amplifier nonlinear optical loop mirrors are implemented for potential GHz operation of switching, multiplexing and de-multiplexing.
 
 
CTuD7 10:15 - 10:30
Picosecond All-Optical Switching Using 1.55 µm Intersubband Transistion in an InGaAs/AlAs/ AlAsSb Coupled Double Quantum Well (C-DQW) Structure, Haruhiko Yoshida, FESTA, Tsukuba, Ibaraki, JAPAN, Teruo Mozume, Arup Neogi, N. Georgiev, T. Akiyama, Osamu Wada, Femtosecond Technology Association, Tsukuba, Ibaraki, JAPAN
We report picosecond all-optical switching using near-infrared intersubband transitions down to the communication wavelength in an InGaAs/AlAs/AlAsSb soupled double quantum well (C-DQW) structure. 1.3 ps response has been demonstrated for 1.55 µm intersubband excitation.
 
 
 
11:00 - 13:00
Session: Nonlinearities in Optical Fibers
Presider: Bernard Weiss, University of Surrey, Surrey, UK
 
 
CTuI1 11:00 - 11:30 (Invited)
Novel Device Structures for Fiber Gratings, Benjamin Eggleton, Bell Laboratories, Lucent Technologies, Murray Hill, NJ USA
We describe an emerging class of structures that enhance the functionality of fiber gratings. Examples include fiber grating tunable dispersion compensators and broadband tunable long-period grating filters that use integrated distributed thin-film metal heaters. We also describe a range of novel grating designs that exploit the unique properties of air-silica microstructured optical fibers.
 
 
 
CTuI2 11:30 - 11:45
Broadband and Nearly Flat Parametric Gain in Single-Mode Fibers, Laurent Provino, Herve Maillotte, E. Lantz, T. Sylvestre, Universite de France Comte, Besancon cedex, FRANCE, John Dudley, University of Auckland, Auckland, NEW ZEALAND
From single- and dual- pump modulational instability calculations, and simulations of the nonlinear Schrodinger equation, broadband and nearly flat parametric gain profiles are obtained in various signle-mode fibers types and in several spectral ranges of optical telecommunications.
 
CTuI3 11:45 - 12:00
Supercontinuum Generation in a Short Tapered Fibre, Tim Birks, W.J. Wadsworth, Philip Russell, University of Bath, Bath, UK
A tapered optical fiber of 1 micron diameter and 30 mm length was used to generate a 200 nm wide supercontinuum form the 0.26 nJ femtosecond pulses emitted by a Ti:sapphire laser.
 
 
CTuI4 12:00 - 12:15
Nonlinear Polarisation Effects in Fibre Bragg Gratings; Experiment and Theory, Neil Broderick, Giampaolo D'Alessandro, A.D. Fitt, M. Ibsen, T.M. Monro, D.J. Richardson, D. Taverner, University of Southampton, Southampton, UK
Using a 8cm long apodised fibre Bragg grating we have examined nonlinear polarisation rotation for pulses inside the photonic bandgap. In addition we have developed a theoretical model to simulate the system and good agreement between theory and experiment has been obtained.
 
 
CTuI5 12:15 - 12:30
Faraday Mirror Stabilization Scheme for Nonlineat Polarization Rotation in Optical Fibers: Model and Applications, Claudio Vinegoni, Mark Wegmuller, Nicolas Gisin, Universite de Geneve, Geneva 4, SWITZERLAND
An elegant, passive stabilization method for ultrafast devices employing nonlinear polarization rotation (NPR) is demonstrated both theoretically and experimentally. It allows for a quantitative measurement of NPR in an optical fiber where it is otherwise completely covered by linear fluctuations, and when applied to a wavelength converter excellent stability over hours is obtained.
 
CTuI6 12:30 - 12:45
Wavelength Conversion From 1.3 µm to 1.5 µm Bands in a Nonlinear Dispersion-Shifted Fiber, T. Sylvestre, Universite Libre de Bruxelles, Brussels, BELGIUM, Herve Maillotte, E. Lantz, Universite de France Comte, Besancon, FRANCE, P. Tchofo Dinda, A. B. Moubissi, S. Pitois, Universite de Bourgogne, Dijon Cedex, FRANCE
Efficient wavelength conversion of a 1.31 µm signal towards the 1.5 µm spectral band is theoretically demonstrated in a 1.4 µm-continuously pumped GeO2-doped dispersion-shifted fiber, through Raman assisted three-wave mixing.
 
 
CTuI7 12:45 - 13:00
SBS in Fiber for Modulation Depth Enhancement of Optically Carried Microwave Signals, S. Tonda-Goldstein, Thomson-CSF, Orsay Cedex, FRANCE, G. Charlet, Thomson-CSF, Elancourt, FRANCE, D. Dolfi, Thomson-CSF, Orsay , FRANCE, Jean-Pierre Huignard, Thomson CSF LCR, Orsay , FRANCE, J. Chazelas, Thomson CSF LCR, Elancourt, FRANCE
We demonstrate that Stimulated Brillouim Scattering (SBS) enables to increase the modulation depth of an optically carried microwave signal by a factor 20. Maximum carrier reduction was obtained up to 40dB.
 
16:00 - 18:30
Session: Pulse Generation, Characterisation & Routing
Presider: Marco Cocito, Centro Studi e Lab Telecommunicazioni SpA, ITALY
 
 
CTuP1 16:00 - 16:15
Pulse Train Stability in High-Bit-Rate Frequency Modulated Er-Yb Laser Transmitters, M. Marano, Stefano Longhi, Politecnico di Milano, Milano, ITALY, Paolo Laporta, Politecnico di Milano/CEQSE-CNR, Milano, ITALY, Mario Puleo, CSELT, Torino, ITALY, P. Gambini, CSELT, Romoli, Torino, ITALY
Pulse-train stability of 2.5-Gbit/s Er-Yb laser transmitters operated in frequency modulation and mode-locking regimes is comparatively analyzed. BER measurements indicate a stability enhancement against cavity detuning by a factor of ~ 8 in the frequency-modulation regime.
 
 
CTuP2 16:15 - 16:30
High-Purity, Optoelectronic Millimeter -Wave Signal Generation by Heterodyne Optical Phase-Locking of External-Cavity Semiconductor Lasers, Masaharu Hyodo, Kazi Sarwar Abedin, Noriaki Onodera, Communications Research Lab, Kobe, JAPAN
High-purity, millimeter-wave signals were successfully generated up to 70.5 Ghz by heterodyning the outputs of two phase-locked external-cavity semiconductor lasers. The signal frequency was easily tuned by controlling the stimulus of an incorporated spectrum analyzer.
 
 
CTuP3 16:30 - 16:45
Exact Optical Frequency Synthesis Over >1 THz Using SG-DBR Lasers, Claudio Silva, University College London, London, UK, A.J. Seeds, University College London, London, UK, Lloyd Langley, Marconi Caswell Limited, Northamptonshire, UK
Exact optical frequency synthesis using widely tunable sampled grating DBR lasers locked to an all-fibre optical comb generator is reported. Synthesis in 17.5GHz steps over a >1THz span is demonstrated with >30dB unwanted line rejection.
 
 
CTuP4 16:45 - 17:00
Wavelength Monitoring of Multi-Channel DWDM-Systems Using a Single Temperature-Tunable Fabry-Perot Filter, Tapio Niemi, T. Laukkanen, Helsinki University of Technology, Helsinki, FINLAND, S. Tammela, VTT Electronics, FINLAND, H. Ludvigsen, Helsinki University of Technology, Helsinki, FINLAND
We have developed a device for wavelength monitoring of a multi-channel wavelength division multiplexed system with one single temperature-tunable Fabry-Perot filter. The device allows monitoring of the transmitter wavelengths with an accuracy of 1 pm.
 
CTuP5 17:00 - 17:15
Performance of Two Operational Modes of a TOAD Device Subject to Frequency-Detuned Signal and Control Pulses, Jian Ming Tang, Paul Spencer, Paul Rees, K. Alan Shore, University of Wales, Bangor, Wales, UK
Two operational modes for terahertz optical asymmetric demultiplexers are studied. It is shown that (i) a ~10dB improvement in the contrast ratio, and (ii) a ~1pJ reduction in the threshold switching energy can be obtained.
 
 
CTuP6 17:15 - 17:30
Precise Measurement of Nonlinear Propagation Characteristics of Sub-Picosecond Optical Pulses in SOAs, Hitoshi Kawaguchi, Yoshitaka Ito, Yamagata University, Yamagata, JAPAN
Nonlinear propagation characteristics of sub-picosecond optical pulses in MQW SOAs are studied using a cross-correlation technique with a time resolution of ~ 100 fs. The device length and operation condition dependencies are examined.
 
CTuP7 17:30 - 17:45
Feasibility of AlGaInAs Lasers for High Speed Uncooled Communications Systems, Alexander Onischenko, Kevin Williams, A.B. Massara, J.C.L. Yong, J.M. Rorison, R.V. Penty, Ian White, University of Bristol, Bristol, UK
An analysis of high-speed operation of AlGaInAs lasers shows an improved performance over GaInAsP lasers, allowing transmission rates above 10Gb/s to be achieved at 90°C.
 
 
CTuP8 17:45 - 18:00
Simple First-Order PMD Reduction System, J. Comellas, Josep Prat, Albert Rafel, J.M. Perdigues, Gabriel Junyent, Polytechnic University of Catalonia, Barcelona, SPAIN
A new first-order polarization mode dispersion reduction technique achieves adaptive operation by means of liquid crystal polarization controller, which is managed through a fuzzy algorithm, followed by a polarizer that eliminates the interfering state of polarization.
 
 
CTuP9 18:00 - 18:15
Influence of Blanket Post-Exposure on the Thermal Stability of Gratings Written in a Telecommunication Fiber Using Light at 193nm, Qinglin Wang, Wuhan Research Inst of Posts & Telcomm, Wuhan, CHINA, Arif Hidayat, Wenxiang Xie, Pierre Niay, Marc Douay, Univ. des Sciences & Tech. de Lille, Villeneuve d'Ascq, FRANCE
We show that post-exposure increase the thermal stability of grating reflectivity meanwhile the shift in Bragg-wavelength is higher than that of untreated gratings. We also analyze the decay mechanism of the refractive index modulation and the mean index.
 
 
CTuP10 18:15 - 18:30
Hig Order Proton-Exchanged Grating Reflectors in Ti:LiNbO3 Waveguides, B.E. Benkelfat, INT Telecom, Evry Cedex, FRANCE, B. Wacogne, R. Ferriere, P. Mollier, Universite de France Comte, Besancon cedex, FRANCE
We propose and demonstrate a simple and reproducible method for fabrication of efficient Bragg gratings reflectors at 1550nm in Ti-indiffused lithium niobate single mode channel waveguides. Frequency response characteristics are presented and discussed.
 
ROOM 7
 
08:30 - 10:30
Session: Atmospheric Sensing and Spectroscopy
Presider: Mike Harris, DERA, UK
 
 
CTuE1 8:30 - 9:00 (Invited)
Airborne Doppler Lidar Wind Measurements, Oliver Reitebuch, Deutsches Zentrum fur Luft-und Raumfahrt e.V., Wessling, GERMANY
Study of the atmospheric wind field is fundamental for the understanding and prediction of the weather development. Optical remote sensing with Doppler Lidat is recognised as an excellent tool to study atmospheric processes on an airborne platform.
 
 
CTuE2 9:00 - 9:15
Remote Chemical Sensing by Pulsed Photoacoustic Spectroscopy, Brian Perrett, G. Constant, M. Harris, G.N. Pearson, Dave Willetts, Defense Evaluation & Research Agency, Malvern, Worcester, UK
Pulsed photoacoustic spectroscopy provides a viable method of condensed-phase chemical identification and detection at ranges of 10m and beyond. The phenomenon is demonstrated on sample materials using a laboratory-based CO2 system.
 
CTuE3 9:15 - 9:30
Mobile Laser Photoacoustic Spectrometer for Multicomponent Trace-Gas Monitoring Based on CO2-and-Quantum-Cascade Lasers as Pump Sources, M. Naegele, ETH Zurich, Zurich, SWITZERLAND, D. Hofstetter, Jerome Faist, Universite de Neuchatel, Neuchatel, SWITZERLAND, M.W. Sigrist, Swiss Federal Institute of Technology, Zurich, SWITZERLAND
We present a novel laser spectrometer using a resonant multipass photocoustic cell with microphone array and both line-tunable CO2 and quantum-cascade lasers as pump sources. Results on in-situ multicomponent trace-gas monitoring are reported.
 
 
CTuE4 9:30 - 9:45
Laser Diagnostics of Nanometric Soot Particles from Diesel Engines, Veronique Boutou, C. Favre, A. Thomasson, Universite Lyon 1, Villeurbanne Cedex, FRANCE, R. Botet, Universite Paris-Sud, Centre d'Orsay, FRANCE, Jean-Pierre Wolf, Universite Lyon 1, Villeurbanne Cedex, FRANCE, J.P. Boch, DRTE, Solaize, FRANCE
A new experimental scheme based on laser multi-spectral and multi-angle scattering has been developed to retrieve the size distribution of nanometric soot particles, including fractal structures, emitted from a diesel engine testing bench.
 
 
CTuE5 9:45 - 10:00
Multicomponent Trace Gas Analysis with Broadly Tunable Mid-Infrared Laser Spectrometer Based on an Optical Parametric Oscillator, Tuomo Leber, A. Bohren, ETH Hoenggerberg, Zurich, SWITZERLAND, M.W. Sigrist, Swiss Federal Institute of Technology, Zurich, SWITZERLAND
We present a mid-IR laser spectrometer with a novel photoacoustic cell for sensitive and selective trace gas monitoring. Analyses of gas mixtures containing volatile organic compounds like benzene, xylenes or dimethylether at ppm-to-sub-ppm concentrations are discussed.
 
CTuE6 10:00 - 10:15
Remote Cross-Wind Measurement Using Atmospheric Turbulence, Reurem Zaibel, Yaakov Glick, G. Bar-Tal, M. Winik, S. Tsadka, Soreq NRC, Yavne, ISRAEL
The average horizontal cross-wind speeds were measured using turbulence flunctuatons of a reflected laser beam from 1.5 km distanced target. Results are compared to two anemometers located along the laser beam path.
 
 
CTuE7 10:15 - 10:30
Mid-Infrared Diode-Laser Difference-Frequency Spectrometer for Environmental Analysis, Torsten Blanke, Ulrike Willer, Wolfgang Schade, Technical University, Clausthal-Zellerfeld, GERMANY
A mid-infrared diode laser based difference-frequency spectrometer is used for the detection of environmental pollutants. In combination with evanescent field spectroscopy benzene is measured in gasoline samples.
 
 
11:00 - 13:00
Session: Quantum Gases
Presider: Christophe Salomon, Ecole Normale Superieure, FRANCE
 
 
QTuC1 11:00 - 11:30 (Invited)
Interferometry and Quantum State Manipulation with Bose-Einstein Condensed Atoms, Mark Kasevich, Yale University, New Haven, CT, USA
Abstract not available.
 
 
QTuC2 11:30 - 11:45
Soliton Dynamics in Bose-Einstein Condensates, K Bongs, S Burger, S Dettmer, Wolfgang Ertmer, Klaus Sengstock, A Sanpera, G. V. Shlyapnikov, M Lewestein, Universitaet Hannover, Hannover, GERMANY
We report on coherent and dissipative dynamics of dark solitons in Bose-Einstein condensates and compare experimental results to theoretical studies. Studies on the interaction of colliding solitons will be discussed.
 
 
QTuC3 11:45 - 12:00
Micromotion of a Bose-Einstein-Condensate in a Dynamic Trap, J. Mueller, O. Morsch, Donatella Ciampini, G. Smirne, Ennio Arimondo, Universita di Pisa, Pisa, ITALY
The micromotion of a rubidium Bose-Einstein-condensate in a triaxial time-orbiting-potential-trap (TOP-trap) was measured and compared to a theoretical model and numerical simulations. Centre-of-mass oscillations of the condensate in the trap along the vertical z-axis were examined.
 
 
QTuC4 12:00 - 12:15
Coherent Evolution of an Atom Laser Coupled in an Atomic Cavity, G. Delannoy, Y. Le Coq, F. Rangwala, F. Gerbier, P. Bouyer, A. Aspect, Institut d'Optique, ORSAY Cedex, FRANCE
We study the evolution of an atom laser coupled into an atomic cavity based on high magnetic fields. Periodic patterns (cavity modes) have been observed.
 
 
QTuC5 12:15 - 12:30
Collective Excitations in a Radio-Frequency Out-Coupled Atom Laser, P. Maddaloni, M. Modugno, Chiara Fort, F. Minardi, Universita di Firenze, Firenze, ITALY, Massimo Inguscio, University of Firenze, Firenze, ITALY
The process of out-coupling a matter-wave beam perturbs the parent condensate. We have investigated, from both experimental and theoretical sides, the collective excitations induced in the condensate by a sudden change of the number of atoms.
 
 
QTuC6 12:30 - 12:45
Coherent Manipulation and Laser Cooling of the Condensate Phase in Atomic Josephson Junctions, C. Menotti, AUSTRIA, Karl Schulze, J. Anglin, P. Fedichev, Innsbruck University, Innsbruck, AUSTRIA, J. Cirac, Peter Zoller, Universitaet Innsbruck, Innsbruck, AUSTRIA
We study the coherent manipulation and dissipative dynamics of the relative phase of atomic condensates coupled by a laser-induced Josephson interaction and coupled to a cavity mode.
 
QTuC7 12:45 - 13:00
Optical Trapping of Fermionic 40K Atoms, Giovanni Modugno, Universita di Firenze, Firenze, ITALY, W. Jastrzebski, Polish Academy of Sciences, Warszaw, POLAND, D. Lau, G. Roati, Universita di Firenze, Firenze, ITALY, Massimo Inguscio, University of Firenze, Firenze, ITALY
We report on trapping at high density of ultracold fermionic 40K atoms in a red-detuned standing-wave dipole trap. We study the collisional properties of the trapped atoms in selected Zeeman sublevels.
 
 
16:00 - 18:30
Session: Ultrafast Spectroscopy in Solids & Nanoparticles
Presider: Koos Duppen, University of Groningen, THE NETHERLANDS
 
 
QTuF1 16:00 - 16:30 (Invited)
Femtosecond Studies of the Carrier Phase and Energy Relaxation in Metals, Hrvoje Petek, Miles Weida, Hisashi Nagano, Susumu Ogawa, Hitachi Ltd., Saitama, JAPAN
The phase and energy relaxation of the intrinsic and alkali-atom adsorbate induced excitations on the low index surfaces of copper is investigated by the interferometric time-resolved two-photon photoemission.
 
 
QTuF2 16:30 - 16:45
Vibrational Wave Packets in Metal Nanoparticles, Samuel Grésillon, G. von Plessen, J. Feldmann, University of Munich, Muechen, GERMANY, J. Porstendorfer, K.-J. Berg, G. Berg, Universität Halle-Wittenberg, Halle, GERMANY
Using time-resolved optical pump-probe spectroscopy we observe superpositions of acoustic vibration modes in silver nanoparticles. They are triggered by the particle expansion resulting from the optical excitation of the electrons and the subsequent lattice heating.
 
 
QTuF3 16:45 - 17:00
Coherent Control of Biexciton Waves in Highly Degenerate Regime, R. Shimano, A. Mysyrowicz, Makoto Kuwata-Gonokami, University of Tokyo, Tokyo, JAPAN
We demonstrate biexciton interference in CuCl using phase controlled femtosecond laser pulses. Energy and momentum selection rule enable us to transfer high bose degeneracy of laser phtons to create biexcitons of high phase space density.
 
 
QTuF4 17:00 - 17:15
Fine Phase Control of Coherent Excitons Using Pulse Shaping Technique, Kazuhiro Komori, Electrotechnical Laboratory, Tsukuba, Ibaraki, JAPAN, Japan Science and Technology Corp., JAPAN, Masanobu Watanabe, Takeyoshi Sugaya, Electrotechnical Laboratory, Tsukuba, Ibaraki, JAPAN, Yasuhiko Fukunaga, Tatehiko Hidaka, Shonan Institute of Technology, JAPAN
We demostrate ultrafast coherent control of excitons in quantum wells using modified pulse shaping technique with precise wavelength control. Very fine phase control and manipulation of the exciton population by phase locked multi-pulses are realized.
 
QTuF5 17:15 - 17:30
Coherent THz Emission From Optically Pumped Parabolic Quantum Wells, Rudolf Bratschitsch, T. Mueller, R. Kersting, Gottfried Strasser, K. Unterrainer, Technische Universitaet Wien, Vienna, AUSTRIA
We report on few-cycle THz emission from modulation doped parabolic quantum wells. The quantum wells are optically excited by NIR femtosecond laser pulses. The emission corresponds to the intersubband plasmon of the parabolic quantum well.
 
QTuF6 17:30 - 17:45
Ballistic Trajectories of Femtosecond Wavepackets Circulating Within Microcavities, Jean-Pierre Wolf, Universite Lyon 1, Villeurbanne Cedex, FRANCE, Y.L. Pan, New Mexico State University, Las Cruces, NM, USA, S. Holler, G.M. Turner, M.C. Beard, C.A. Schmuttenmaer, Richard Chang, Yale University, New Haven, CT, USA
We present the first ever time-resolved observation of the ballistic motion of femtosecond wavepackets around the equator and along the rainbow-like chords within a dye-doped microcavity. The pump-probe scheme employs two-color-photons excited fluorescence as
the correlation signal.
 
 
QTuF7 17:45 - 18:00
Sub-10 FS time Resolved Study of Excited State Relaxation in Beta-Carotene, Guglielmo Lanzani, Giulio Cerullo, M. Zavelani-Rossi, Sandro De Silvestri, Politecnico di Milano, Milano, ITALY
The process following photoexcitation of ß-carotene are studied with sub-10 fs time resolution by pump-probe spectroscopy. We observed dynamic Stokes shift in S2, within 40 fs, and the build-up of S1 population in 0.5 ps.
 
 
QTuF8 18:00 - 18:30 (Invited)
Probing Single Particle and Collective Excitations in Superconductors and Related Materials with Femtosecond Spectroscopy, Dragan Mihailovic, J. Demsar, Institut Jozef Stefan, Ljubljana, SLOVENIA, V.V. Kabanov, Institut Jozef Stefan, Ljubljana, SLOVENIA
 
 
ROOM 8
 
08:30 - 10:30
Session: Spectroscopy with Cold Atoms and Ions
Presider: Anders Kastberg, University of Stockholm, SWEDEN
 
 
QTuA1 8:30 - 9:00 (Invited)
Quantum Transport of Atoms in Optical Lattices, Mark Raizen, University of Texas at Austin, Austin, TX, USA
We report recent results and progress on the use of optical dipole potentials for quantum state preparation in the study of quantum chaos in mixed phase space, and for detection and feedback control of atomic motion.
 
 
QTuA2 9:00 - 9:15
Photoassociation of Cold Ca Atoms, G. Zinner, Physikalisch-Technische Bundesanstalt, Braunschweig, GERMANY, Tomas Binnewies, F. Riehle, Physikalisch-Technische Bundesanstalt, Braunschweig, GERMANY, E. Tiemann, Universitaet Hannover, Hannover, GERMANY
The first measurements of a photoassociative spectrum of an alkaline earth element near the dissociation limit resolved vibrational and rotational structure by detecting the loss from a magneto-optical trap. Atomic parameters are derived by different theoretical approaches.
 
 
QTuA3 9:15 - 9:30
Quasi-degenerate Phase Conjugation Spectroscopy of Cold Cesium, G. Cardoso, Universidade Federal de Pernambuco, Recife, PE, BRAZIL, A. Lezama, Instituto de Fisica, Montevideo, URUGUAY, J. Tabosa, Universidade Federal de Pernambuco, Recife, PE, BRAZIL
Phase conjugated light produced in resonant cold Cs atoms was studied as a function of probe field frequency and polarization. Large spectral variations due to Zeeman level degeneracy were observed in good agreement with theory.
 
 
QTuA4 9:30 - 9:45
Coupling Atomic Excitation and Surface Modes in Dielectric Cavity-QED, H. Failache, Alexis Fischer, S. Saltiel, M.-P. Gorza, M. Fichet, Daniel Bloch, Martial Ducloy, Universite Paris Paris-Nord, Villetaneuse, FRANCE
Atomic virtual deexcitation can resonantly couple to an electromagnetic mode of a neighboring surface, opening possibility for an atom-surface van der Waals repulsion. Extensions involve surface-induced resonant quenching, and quantum transfer of the thermal surface exitation.
 
 
QTuA5 9:45 - 10:00
Indium Single-Ion Optical Frequency Standard, Th. Becker, Max-Planck-Institute f. Quantenoptik, Garching, GERMANY, A. Yu. Nevsky, M. N. Skvortsov, Institute of Laser Physics, Novosibirsk, RUSSIA, Ch. Schwedes, M. Eichenseer, J. Von Zanthier, Ekkehard Peik, H. Walther, Max-Planck-Institute f. Quantenoptik, Garching, GERMANY
We present recent results on an optical frequency standard, based on the 1S0 ->3P0 transition of a single trapped laser cooled In+ ion. A resolution of 10-13 Has been achieved so far (linewidth ~200Hz at 1267 THz). Systematic shifts should be controllable at the millihertz level.
 
 
QTuA6 10:00 - 10:15
Optical Frequency Measurements with a Single, Trapped Stronium Ion Standard, John Bernard, A. A. Madej, K. J. Siemsen, L Marmet, Inst for National Measurement Standards, Ottawa, Ontario, CANADA
An optical frequency standard at 445 THz, based on a single, trapped Sr+ ion has been used to measure the frequency of a two photon transition in 87Rb at 385 THz and the HeNe/I2 standard at 474 Thz.
 
 
QTuA7 10:15 - 10:30
Motion-Induced Dark Resonance and Density Distribution in a Paul-Trap, Thomas Baier, I. Malchartzek, H. Ebensing, Hermann Harde, Universitaet der Bundeswehr Hamburg, Hamburg, GERMANY
We report on the observation and interpretation of dark resonances orginating from the motional frequenices of Ca+ Ions stored in a large Paul trap and present measurements of the ion cloud distribution as a function of the number density. An expanded model for the motion and space distribution is discussed.
 
 
11:00 - 13:00
Session: Tutorials 2 & 3
Presider: Fujio Shimizu, University of Electro-Communications, Tokyo, JAPAN
 
 
TUT2&31 11:00 - 12:00
New Approaches to Precise Optical Spectroscopy, Theodor Haensch, University of Munich, Muenchen, GERMANY
The precisely spaced frequency comb from a mode-locked femtosecond laser can provide a direct link between microwave and optical frequencies. New opportunities for precise optical spectroscopy include fundamental tests and accurate measurements of fundamental constants.
 
 
TUT2&32 12:00 - 13:00
Quantum NonDemolition Measurements, Philippe Grangier, Lab Charles Fabry de l'Institut d'Optique, Orday, FRANCE
This tutorial will review the state of the art of QND measurements in quantum optics, as well as future perspectives of development related to quantum information processing.
 
 
16:00 - 18:30
Session: Temporal Instabilities and Solitons
Presider: Stefano Longhi, Politecnico di Milano, ITALY
 
 
QTuG1 16:00 - 16:30 (Invited)
Generation of Temporal Dissipative Structures in a Continuous-Wave Pumped Passive Nonlinear Optical Fiber Ring Cavity, Stephane Coen, Marc Haelterman, Universite Libre de Bruxelles, Brussels, BELGIUM
Thanks to a passive fiber cavity, we succeed, for the first time, in implementing experimentally the mean-field model of Lugiato and Lefever and in observing modulational instability in the continuous wave regime.
 
 
QTuG2 16:30 - 17:00 (Invited)
Confirmation of Observation of the Risken-Nummedal-Graham-Haken Instability, Tom Voigt, Universitaet Rostock, Rostock, GERMANY, German de Valcarcel, Eugenio Roldan, Universitat de Valencia, Burjassot, SPAIN, O. Lenz, Fedor Mitschke, Universitaet Rostock, Rostock, GERMANY
We found a way to confirm that the sidemode instability in fiber lasers is indeed the elusive Risken-Nummedal-Graham-Haken instability.
 
 
QTuG3 17:00 - 17:15
Soliton Squeezing through Antiresonant Electrostrictive Mode Coupling in a Brillouin Fiber Ring Laser, Carlos Montes, Isabelle Bongrand, Eric Picholle, Jean Botineau, Antonio Picozzi, CNRS, Nice, FRANCE
Although transverse cladding Brillouin scattering is a detrimental effect on solitons in optical fibers, we show for the first time that certain resonances may squeeze Brillouin solitons in fiber cavities.
 
 
QTuG4 17:15 - 17:30
Echkaus Instabilities Induced by Nonuniformities: A Laser Example, J. Plumecoq, C. Szwaj, Marc Lefranc, Universite des Sciences & Technologies de Lille, Villeneuve d' Ascq, FRANCE, Dominque Derozier, Laboratoire de Physique des Lasers, Villeneuve d' Ascq Cedex, FRANCE, T. Erneux, Universite Libre de Bruxelles, Bruxelles, BELGIUM, Serge Bielawski, Universite des Sciences & Technologies, FRANCE
We describe quantitatively an instability affecting parametric stationary waves, stemming from spatial nonuniformities of control parameters. This instability is observed experimentally in a modulated multimode laser, and is expected to occur in other optical systems.
 
 
QTuG5 17:30 - 17:45
Manipulation of Soliton Ensembles by Spectral Filtering, Soeren Rutz, Tibor Koeroesi, Fachbereich Physik, Rostock, GERMANY, Fedor Mitschke, Universitaet Rostock, Rostock, GERMANY
Soliton ensembles are created in a synchronously driven nonlinear fiber ring resonator. Flexible manipulation of the ensemble is provided by spectral techniques.
 
 
QTuG6 17:45 - 18:00
Dispersion-Induced Transition Towards Dynamical Parametric Solitary Waves, Antonio Picozzi, CNRS, Nice, FRANCE, Marc Haelterman, Universite Libre de Bruxelles, Brussels, BELGIUM
We show numerically and analytically through an original extension of the Kolmogorov- Petrovskii- Piskunov assertion, that dispersion is responsible for a transition from usual parametric solitary waves towards a new type of dynamical solitary waves.
 
 
QTuG7 18:00 - 18:30 (Invited)
Discrete Optical Solitons, Yaron Silberberg, H.S. Eisenberg, Weizmann Institute of Science, Rehovot, ISRAEL, R. Morandotti, U. Peschel, J. Stewart Aitchison, University of Glasgow, Glasgow, Scotland, UK
Arrays of coupled nonlinear waveguides can support discrete solitons, which propagate along the array while maintaining their spatial profile. Experiments showing similarities and differences with continuous spatial solitons will be described.
 
ROOM 9
 
08:30 - 10:30
Session: Squeezing
Presider: Hans Bachor, Australian National University, ACT, AUSTRALIA
 
 
QTuB1 8:30 - 8:45
Dynamial Picture of Quantum Fluctuations in Semiconductor Lasers: The Role of Noise Modulation and Squeezing Hindering by Pump-blocking, Martino Travagnin, Universita di Milano, Milano, ITALY, Luigi Lugiato, Università dell'Insubria, Como, ITALY
By stochastic simulations we show that intensity squeezing in semiconductor lasers follows from a process of correlated noise modulation in the carrier and photon fluctuations, and that pump-blocking hinders this process.
 
 
QTuB2 8:45 - 9:00
Pump-Blocking and Intensity Noise in Semiconductor Lasers, Isabelle Maurin, Jean-Pierre Hermier, A. Bramati, Elisabeth Giacobino, Universite P. et M. Curie, Paris, FRANCE
We have studied the effects of pump-blocking in laser diodes through the voltage noise across the diodes. We demonstrate that this noise is highly correlated with the intensity noise of the beam.
 
 
QTuB3 9:00 - 9:15
Self Homodyne Tomography of a Squeezed Laser Diode, A Conti, Instituto Nazionale di Ottica Applicata, Firenze, ITALY, M. Fiorentino, Universita di Napoli Federico II, ITALY, G. Giacomelli, Instituto Nazionale di Ottica Applicata, Firenze, ITALY, Francesco Marin, Universita di Firenze, Firenze, ITALY, A. Zavatta, Instituto Nazionale di Ottica , Firenze, ITALY
We present an experimental self-homodyne tomography of an amplitude squeezed laser diode.
 
QTuB4 9:15 - 9:30
Intensity Noise Correlations in Vertical-Cavity Surface-Emitting Lasers, Jean-Pierre Hermier, Isabelle Maurin, A. Bramati, Elisabeth Giacobino, Universite P. et M. Curie, Paris, FRANCE, Karl Ebeling, P. Schnitzer, University of Ulm, Ulm, GERMANY
We have experimentally studied the intensity noise properties of single transverse mode vertical-cavity surface-emitting lasers. Our results are found to be in good agreement with the prediction of a theoretical model.
 
 
QTuB5 9:30 - 9:45
Critical Petermann K-Factor for Intensity Noise Squeezing, Alexander van der Lee, N. van Druten, M. van Exter, J. P. Woerdman, University of Leiden, Leiden, THE NETHERLANDS, Jean-Philippe Poizat, CNRS Laboratoire PHASE, Orsay, FRANCE, Philippe Grangier, Lab Charles Fabry de l'Institut d'Optique, Orsay, FRANCE
We show theoretically that sub-shotnoise operation by quiet pumping of a single-mode laser is impossible when the Petermann excess noise factor exceeds 3/2. This result is supported by experimental data.
 
 
QTuB6 9:45 - 10:00
Photon- Number Squeezing by Spectrally Filtering light From a Semiconductor Waveguide, J. Brown, M. B. Ward, H. Ju, B. Kaestner, J. F. Ryan, University of Oxford, Oxford, UK
We report the generation of fs photon-number squeezed pulses of light from an AlGaAs waveguide by spectral filtering. The results are discussed in terms of spectral correlations induced by self-phase modulation.
 
 
QTuB7 10:00 - 10:30 (Invited)
Ultra-Low Thresold Operation and Pump Squeezing with a Triply-Resonant C. W. OPO Using Periodically Poled Lithium Niobate, Thomas Coudreau, K. S. Zhang, M. Martinelli, Agnes Maitre, Claude Fabre, Universite Pierre et Marie Curie, Paris Cedex 05, FRANCE
We demonstrate a triply-resonant c.w. OPO using periodically-poled lithium nibate with a threshold of 300µW. The quantum fluctuations of the pump beam were measured to be 38% below the shot noise.
 
 
11:00 - 13:00
Session: Transverse Effects
Presider: W. Lange, Westfaelische Wilhems-Universitaet Muenster, GERMANY
 
 
QTuD1 11:00 - 11:15
Pump-Induced Focussing and Defocussing for a Probe Beam and Soliton Formation in Sodium Vapor, L. Furfaro, G. Fabre, Gian Luca Lippi, Institut Non Lineaire de Nice, Valbonne, FRANCE
The nonlinear modification of the spatial distribution of the index of refraction, induced by a strong pump beam, modifies the propagation properties of a weak beam, including the appearance of induced solitons.
 
 
QTuD2 11:15 - 11:30
Spatiotemporal Instabilites Induced by Spatial Non Uniformities in a Nematic Liquid Crystal with Optical Feedback, C. Szwaj, Pierre Glorieux, Eric Louvergneaux, Universite des Sciences & Technologies de Lille, Villeneuve d'Ascq, FRANCE
We show, both experimentally and theoretically, that spatial non uniformities are responsible for spatiotemporal instabilities in the tranverse patterns obtained in a nematic liquid crystal subjected to optical feedback.
 
 
QTuD3 11:30 - 11:45
From Hexagons to Optical Turbulene, Marco Santagiustina, Universita di Padova, Padova, ITALY and Instituto Mediterraneo de Estudios Avanzados, Palma de Mallorca, SPAIN, Damia Gomila, Pere Colet,Maxi San Miguel, Universidad de las Islas Baleares, Palma de Mallorca, SPAIN, Miguel Hoyuelos, Instituto Mediterraneo de Estudios Avanzados, Palma de Mallorca, SPAIN
Competition between the self-focusing Kerr effect, diffraction , losses an pumping, makes a static hexagonal pattern undergo consecutive instabilities until optical turbulence appears. We show here how the transition takes place.
 
 
QTuD4 11:45 - 12:00
Extracting Low Dimensional Nonlinear Dynamics From Weak Opitcal Turbulence Through Topological Analysis, Eric Yao, M. Lefranc, Francesco Papoff, University of Manchester, Manchester, UK
We present a novel approach which allows us to extract useful information about the nonlinear processes from a system exhibiting weak optical turbulence. Our method is applicable to all spatially extended nonlinear optical systems.
 
 
 
QTuD5 12:00 - 12:15
Patterns in Lasers with Astigmatic Cavities and Apertures, Francesco Papoff, University of Manchester, Manchester, UK, Giampaolo D'Alessandro, University of Southampton, Southampton, UK, Eric Louvergneaux, D. Dangoisse, Pierre Glorieux, Univ. des Sciences & Tech. de Lille, Villeneuve d'Ascq, FRANCE
We report on the experimental and theoretical investigation of the effects of astigmatism and hard diffracting objects (e.g. apertures) on pattern formation in a CO2 laser.
 
 
QTuD6 12:15 - 12:30
Patterns in Nonlinear Optics in Presence of (Quantum) Noise, Kestutis Staliunas, Physikalisch-Technische Bundesanstalt, Braunschweig, GERMANY
We show that optical patterns progressively emerge from the noise by approaching the pattern forming threshold from below. Above the threshold the noisy patterns show Bose-Einstein-like statistical distributions in the far field (momentum space), and 1/f temporal power spectra.
 
 
QTuD7 12:30 - 12:45
Spatial Mode Control of Infrared Radiation Generated by Difference Frequency in Periodically-Poled Crystals, G. Giusfredi, D Mazzotti, P Cancio, Paolo De Natale, Instituto Nazionale di Ottica Applicata, Firenze, ITALY
We have studied the evolution of the spatial mode of radition at 4.3µm generated by difference-frequency in a periodically-poled crystal. A numerical program has been developed and calculated results reproduce well experimental observations.
 
 
QTuD8 12:45 - 13:00
CW and Transient Characteristics of Polarization Switching in Vertical-Cavity Surface-Emitting Lasers, Thorsten Ackemann, M. Sondermann, Westfaelische Wilhems-Universitaet Muenster, Muenster, GERMANY
cw and transient features of polarization switching in VCSELs are investigated experimentally close to the threshold minimum in dependence of temperature and current in order to clarify the interplay of linear anisotropies and non linear dispersion.
 
 
16:00 - 18:30
Session: Electronic Excitations
Presider: Andre Mysyrowicz, Ecole Polytechnique, ENSTA, Palaisseau, FRANCE
 
 
QTuH1 16:00 - 16:15
Speckle - Averaged Resonant Rayleigh Scattering from Quantum Well Excitons, G. Hayes, Ecole Polytech Fed Lausanne, Lausanne, SWITZERLAND, B. Deveaud, Swiss Federal Institute of Technology, Lausanne, SWITZERLAND, V. Savona, Universitat zu Berlin, Berlin, GERMANY, S. Haacke, Lausanne University, SWITZERLAND
We have measured the ultrafast resonant Rayleigh scattering from quantum well excitons using Fourier transform infrared spectroscopy. We demonstrate that theories based on ensemble-averaging can be compared directly with the experimental resonant Rayleigh scattering dynamics.
 
 
QTuH2 16:15 - 16:30
Instantaneous Raleigh-scattering From Excitons Localized in Monolayer Islands, Wolfgang Langbein, University of Dortmund, Dortmund, GERMANY, K. Leosson,, J. Jensen,, Jorn Hvam, Technical University of Denmark, Lyngby, DENMARK, R. Zimmermann, Universitat zu Berlin, Berlin, GERMANY
The initial dynamics of Rayleigh scattering from quantum-well excitons acquires an instantaneous component when exciting only a subsystem, here excitons of specific monolayer thickness. This is due to a spatial non-uniformity of the respective polarizability.
 
 
QTuH3 16:30 - 16:45
Theory of Secondary Emission and Exciton Formation in Semiconductor Quantum Wells, Steffen Kuckenburg, A Thraenhardt, A Knorr, Stephan Koch, Philipps University, Marburg, GERMANY
A theoretical description of secondary emission due to the simultaneous action of exciton-phonon, exciton-photon and exciton disorder interaction is presented. Strong competition effects between the different mechanisms are observed.
 
 
QTuH4 16:45 - 17:00
The Excitonic AC Stark Splitting in Quantum Wells, Michele Saba, F. Quochi, C. Cuiti, D. Martin, J. L. Satehli, EPFL, Lausanne - EPFL, SWITZERLAND, B. Deveaud, Swiss Federal Institute of Technology, Lausanne, SWITZERLAND, G. Bongiovanni, Universit di Cagliari, ITALY, A. Mura, Universit di Cagliari, ITALY
Pump-probe measurements show the dynamical Stark splitting in the exciton absorption spectrum of semiconductor quantum wells. The intensity of the sidebands is comparable to this linear absorption and their separation scales as the pump field.
 
 
QTuH5 17:00 - 17:15
Room Temperature Spin Gratings in InGaAsP Multiple Quantum Wells, Dawn Marshall, Michael Mazilu, Alan Miller, University of St. Andrews, St. Andrews, Fife, UK, Chris Button, University of Sheffield, Sheffield, UK
We present room temperature spin gratting measurements fitted with a five level model of the grating decay in InGaAsP multiple quantum wells taking into account one dimensional electron diffusion and spin relaxation.
 
 
QTuH6 17:15 - 17:30
Observation of Electron-Hole Plasma via Exciton Mott Transition in CuCl by Mid-Infrared Pump Probe Spectroscopy, M. Nagai, University of Tokyo, Tokyo, JAPAN, M. Ashida, Japan Science & Technology Corp, Takatsu-Ku, Kawasaki, JAPAN, R. Shimano, Makoto Kuwata-Gonokami, University of Tokyo, Tokyo, JAPAN
We report on time-resolved emission and mid-infrared pump probe measurements for resonant excitation of excitons above Mott transition density in CuCl. Creation of electron hole plasma by exciton Mott transition is observed.
 
 
QTuH7 17:30 - 17:45
Exciton Energy Renormalisation due to the Biexciton Gas, G. Brown, I. Blewett, I. Galbraith, A.K. Kar, B.S. Wherrett, Heriot-Watt University, Edinburgh, UK
Polarisation-selective pump-continuum-probe data demonstrates that interband recombination in widegap semiconductors at 4K is preceeded by a phase dominated by biexcitonic correlations. There is a finite blueshift of the exciton resonance due to this biexciton gas.
 
 
QTuH8 17:45 - 18:00
Radiative Lifetimes of Negatively Charged Excitons in CdTe Quantum Wells, Victoria Ciulin, Swiss Federal Institute of Technology, Lausanne, Lausanne, SWITZERLAND, P. Kossacki, Warsaw University of Technology, Warsaw, POLAND, M. Kutrowski, Polish Academy of Sciences, POLAND, A. Esser, Humboldt University zu Berlin, Halbleitertheorie, GERMANY, S. Haacke, J-D. Ganiere, Swiss Federal Institute of Technology, Lausanne, SWITZERLAND, T. Wojtowicz, Polish Academy of Sciences, POLAND, B. Deveaud, Swiss Federal Institute of Technology, Lausanne, SWITZERLAND
Due to large binding energies in CdTe, we observe a dramatic increase of the trion lifetime in function of temperature up to 30 K. This dependence is discussed and compared to a delocalised trion model.
 
 
QTuH9 18:00 - 18:15
Effect of Laser Pulse on Sheet Currents oF Superconductor Films, K. P. Gaikovich, Ju. N. Nozdrin, Inst for Physics of Microstructures, Nizhny Novgorod, RUSSIA
It was discovered that the currents in a thin superconductor film fixed in a external magnetic field redistribute after a laser pulse irradiation without a change of the total number of current vortices, which seemed impossible from point of view of Bean model.
 
 
QTuH10 18:15 - 18:30
Direct Current Generation Due to Wave Mixing in Semiconductor Superlattices, Kirill Alekseev, Kirensky Institute of Physics, Krasnoyarsk, RUSSIA, Feodor Kusmartev, Loughborough University, Loughborough, UK
A novel effect of direct current generation in the semiconductor superlattices due to a mixing of coherent electromagnetic waves of commensurate frequencies is described. It is shown that the current has a maximal value at mixing of terahertz radiations.
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