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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 - THURSDAY POSTERS

12 - 14 September, Nice Acropolis, Nice, France

 

MONDAY

TUESDAY

WEDNESDAY

THURSDAY

FRIDAY

TUESDAY POSTERS WEDNESDAY POSTERS THURSDAY POSTERS

 

CLEO POSTERS
 
10:30 - 12:00
Session: CLEO EUROPE 2000 Poster Session
Mediterranee
 
CThE1 10:30 - 12:00
Intracavity Second Harmonic Generation of a CW CO2 Laser in AgGaSe2, V.O. Petukhov, V.A. Gorobets, K.V. Kozlov, S. Ya. Tochitsky, National Academy of Sciences of Belarus, Minsk, BELARUS
Several original schemes for intracavity frequency doubling of a cw CO2 laser radiation in AgGaSe2 nonlinear crystals have been proposed and studied experimentally. More than 100 mW at 5µm was generated, which is ~10 times higher than one obtained with a standard external focussing scheme for this laser.
 
 
CThE2 10:30 - 12:00
Broadband Fast Tuning with an Electro-Optic Prism in a Diode Laser Extended Cavity, Ivan Lorgere, Louis Cabaret, Loiec Menager, Jean-Louis Le Goueet, Laboratoire Aime Cotton, Orsay, FRANCE
An electroptic prism simultaneously controls the cavity length and the angle of incidence on the grating in an extended cavity diode laser. Mode-hop-free tuning is achieved with excellent reproducility over more than thirteen gigahertz.
 
 
CThE3 10:30 - 12:00
Level Splitting Effects in CW Resonant Four-Wave Mixing, S. A. Babin, S. I. Kablukov, Institute of Automation and Electrometry, Novosibirsk, RUSSIA, U. Hinze, E. Tiemann, B. Wellegehausen, Universitaet Hannover, Hannover, GERMANY
We report about experimental investigations on resonant four wave mixing (FWM) cycles in Doppler broadened molecular sodium. Weak-field frequency tuning allows to observe resonant structures in the FWM-signal induced by strong pump fields.
 
 
CThE4 10:30 - 12:00
Observation of a Dip in the Spectrum of Noise After Propagation in an Optical Fiber, Jose Chavez Boggio, S. Tenenbaum, A. Guimaraes, Hugo Fragnito, UNICAMP, Campinas, SP, BRAZIL
We report on the observation of a dip in the optical noise specturm induced by a pump laser at a symmetric location relative to the zero dispersion wavelength of a dispersion shifted fiber.
 
 
CThE5 10:30 - 12:00
Frequency Conversion of Ultraviolet Short-Pulse Laser Radiation, C. Reinhardt, Universitaet Hannover, Hannover, GERMANY, H. Kawano, Inst of Physical & Chemical Research, JAPAN, S. Skorupka, M.D. Timu, Universitaet Hannover, Hannover, GERMANY, C. Doelle, Laser-Laboratorium Goettingen, Goettingen, GERMANY, B. Wellegehausen, Universitaet Hannover, Hannover, GERMANY
Different possibilities for efficient nonlinear frequency conversion of femtosecond KrF laser pulses into extreme ultraviolet radiation are investigated. It is shown that energies of 1 mJ are possible in the vacuum ultraviolet.
 
 
CThE6 10:30 - 12:00
Parametric Generation and Second Harmonic Generation in Titanium-PPLN Segmented Waveguides, K. El Hadi, Lab Physique de la Mat. Condensee, Nice, FRANCE
We report the first study of parametric interactions in periodically poled titanium LiNbO3 segmented waveguides. Periodic poling was achieved after titanium indiffusion. A normalized conversion efficiency of 30%. W^-1.cm^-2 was obtained, and can be improved.
 
 
CThE7 10:30 - 12:00
Temperature-Tuned Type-2 90° Phase-Matched SHG of CO2 Laser Radiation at 9.2714-10.5910µm in CdGe (As1-xPx)2, K. Kato, Eiko Takaoka, Chitose Institute of Science & Tech, Chitose, Hokkaido, JAPAN, N. Umemura, Japan Defense Agency, Setagaya, Tokyo, JAPAN
CdGe(As1-xPx)2 with x = 0.241 ±0.02 was found to be 90° phase-matchable for type-2 SHG of a CO2 laser from 9.2714 to 10.5910 µm by temperature tuning. Temperature and angle phase-matching properties of this crystal are presented.
 
 
CThE8 10:30 - 12:00
Interferometry of Spontaneous Parametric Scattering, D. Yu. Korystov, S.P. Kulik, S.V. Ivanchenko, A.N.Penin, Moscow State University, Moscow, RUSSIA
The interference of spontaneous radiation emitted from two macroscopic regions is considered. It was shown that frequency-angular intensity distribution formed in far field zone contains quantitative information about dispersion properties of the substances placed between two nonlinear crystals.
 
 
CThE9 10:30 - 12:00
Frequency Stable Molecular Iodine Raman Laser and Bichromatic Fields, M. Klug, Universitaet Hannover, Hannover, GERMANY, K. Schulze, E. Tiemann, B. Wellegehausen, Universitaet Hannover, Hannover, GERMANY
Pumped by a frequency doubled monolithic Nd:YAG laser frequency stable iodine Raman lasers with linewidths below 5 kHz have been realized. Operation of the laser and investigations on Raman coupled bichromatic fields will be discussed.
 
 
CThE10 10:30 - 12:00
Second Harmonic Generation by Mixing of Bessel and Gaussian Light Beams, T.A. King, University of Manchester, Manchester, UK, Wim Hogervorst, Vrije Universiteit, Amsterdam, THE NETHERLANDS, Vladimir Belyi, N.S. Kazak, N.A. Khilo, A.G. Mashchenkno, E.G. Katranji, National Academy of Sciences of Belarus, Minsk, BELARUS
A comparative analysis is performed of type II second harmonic generation for the three following pairs of fundamental-frequency light beams: i) two Bessel beams, ii) Bessel and Gaussian beam, iii) Bessel and Gaussian beams of both polarizations.
 
 
CThE11 10:30 - 12:00
Tunable Mid-Infrared Light Generation in Periodically-Poled Crystals of the KTiOPO4 Family and Application to Gas Sensing, Keren Fradkin-Kashi, Ady Arie, Pavel Urenski, Alexander Skliar, Gil Rosenman, Tel Aviv University, Ramat Aviv, ISRAEL
Difference frequency mixing of a Nd:YAG laser and a tunable diode laser (~1.5µm) in periodically-poled crystals of the KTiOPO4 family generates mid-infrared radiation (3.15 - 3.75µm), which is applied to sensitive high-resolution spectroscopy of methane.
 
 
CThE12 10:30 - 12:00
Hybrid Organic/Inorganic Waveguide Structure with Highly Efficient Second Order Nonlinear Interactions, M. Alshikh Khalil, Guy Vitrant, ENSERG, Grenoble, FRANCE, P.A. Chollet, F. Kajzar, CEA LETI DEIN SPE, Gif sur Yvette, FRANCE
Hybrid planar waveguides are constituted of ion-exchanged glass substrates top covered by high index polymer layers. Without any corrugation, modal phase-matching allows us to demonstrate highly efficient second harmonic generation and even parametric amplification.
 
 
CThE13 10:30 - 12:00
High Efficiency Second Harmonic Generation of Femtosecond Laser Pulses in Dispersion Compensated Ring Cavity, Sandor Lako, P. Apai, R. Szipoecs, Res Inst for Solid State Phys & Optics, Budapest, HUNGARY
We propose a dispersion compensated ring cavity for enhancement of second harmonic generation of femtosecond pulses. We demonstrate a 400% increase in the conversion efficiency relative to conventional single pass arrangment with sub-100-fs pulses.
 
CThE14 10:30 - 12:00
Picosecond Raman Gain of CaCO3, KGs(WO4)2 and BaWO4 Crystals, Pavel Cerny, Helena Jelinkova, Czech Technical University, Prague 1, CZECH REPUBLIC, Petr Zverev, Tasoltan Basiev, General Physics Institute, Moscow, RUSSIA, Vaclav Kubecek, Czech Technical University, Prague, CZECH REPUBLIC
Stimulated Raman scattering of picosecond laser pulses in three crystals- commonly used CaCO3 and KGd(WO4)2, and in a new tungstate crystal BaWO4 was investigated and parameters of Stokes radiation (threshold energy, gain, pulse length) were determined.
 
 
CThE15 10:30 - 12:00
Coherent Pumping of Mesospheric Sodium to Create a Bichromatic Guidestar, Jens Biegert, Jean-Claude Diels, University of New Mexico, Albuquerque, NM, USA, Peter Milonni, Los Alamos National Laboratory, Los Alamos, NM, USA
The feasibility of a coherent pumping scheme to create a bichromatic artificial guidestar is demonstrated. Nearly 100% population inversion is shown at pump fluences which are only in the microjoule per square-centimeter range.
 
 
CThE16 10:30 - 12:00
Liquid Light States?, H. Michinel, J. Campo-Taboas, Universidade de Vigo, Ourense, SPAIN, M.L. Quiroga-Teixeiro, Chalmers University, Goeteborg, SWEDEN
We analyse collisional properties of light condensates inside a cubic-quintic nonlinear material with boundaries and localised inhomogeneties. Interesting analogies with fluid dynamics are learned.
 
 
CThE17 10:30 - 12:00
Bessel Light Beam Sum Frequency Mixing in KTP Crystal, M.B. Danailov, Sincrotrone-Trieste, Trieste, ITALY, P. Apai, Res Inst for Solid State Phys & Optics, Budapest, HUNGARY, Vladimir Belyi, N.A. Khilo, A.N. Kuzmin, G.I. Ryabtsev, A.A. Demidovich, National Academy of Sciences of Belarus, Minsk, BELARUS
The paper presents studies of Bessel beam Sum Frequency Generation in the case of mixing of Nd:YAG (1064 nm) and Ti:S (808nm) laser radiation in a KTP crystal. Phasematching curves for both the Gaussian and Bessel case, as well as CCD images of the spatial profiles of the generated beam at different wavelengths are given.
 
 
CThE18 10:30 - 12:00
Leaky-Wave Resonances in Second-Harmonic Generation Induced by Surface Transient Grating, R. Petruskevicius, Institute of Physics, Vilnius, LITHUANIA
The study of three and four-wave mixing processes at metal surface related to excitation of surface polaritons at the fundamental and second-harmonic frequencies by means of induced surface transient grating was carried out. The effects of enhancement and bistablity of second-harmonic generation were determined.
 
 
CThE19 10:30 - 12:00
Powerful All Solid-State Sources of Eye-Save Radiation, Valentin Orlovich, A.V. Kachinsky, A.A. Buj, JV SOLAR TII, Minsk, BELARUS, A.S. Grabchikov, S.A. Batishe, R.V. Chulkov, National Academy of Sciences of Belarus, Minsk, BELARUS
Eye-save radiation with energy up to 100 mJ was produced using Raman conversion in Ba(NO3)2 crystals pumped with Nd:YAG-laser at 1.064, 1.319, 1.338, 1.357 µm.
 
CThE20 10:30 - 12:00
Depth Dependence of the Second Harmonic Generation in Ion-Implanted LiNbO3 Waveguides, A. Boudrioua, Universite de Metz et Supelec, Metz, FRANCE, Fredrik Laurell, Royal Institute of Technology, Stockholm, SWEDEN, Paul Moretti, Universite Lyon, Villeurbanne, FRANCE, J.C. Loulergue, Universite de Metz et Supelec, Metz, FRANCE
Results of depth profiling of the nonlinear optical capabilities of implanted lithium niobate waveguides are reported. They show that the nonlinearity is well preserved in the guiding region.
 
 
CThE21 10:30 - 12:00
Resonant Four-Wave Mixing and Parametric Amplification in Double-L Level Schemes, U. Hinze, B.N. Chichkov, E. Tiemann, B. Wellegehausen, Universitaet Hannover, Hannover, GERMANY
We report on experimental and theoretical investigations of nondegenerate continuous resonant four-wave mixing and parametric amplification in Double-L schemes. Simultaneous amplification of two weak probe fields driven by two strong pump fields is demonstrated.
 
 
CThE22 10:30 - 12:00
Effective SBS Pulse Compression to <100 ps in Liquid CCl4 and Fluorocarbon, Rytis Buzelis, A.S. Dement'ev, E. Murauskas, Institute of Physics, Vilnius, LITHUANIA
Stokes pulses with duration of ts ts~75 ps and energy of Ws ~ 1 mJ were achieved by transient SBS of an asymmetrical pump pulse (tL~600 ps, WL~ 4 mJ) in CCl4. High energy stable picoseconf Stokes pulses (Ws ~25 mJ, tS~85 ps) were received using SBS compression in heavy fluorocarbon of pump pulses with tL~ 2 ns and WL ~40 mJ.
 
 
CThE23 10:30 - 12:00
Enhancement of Second-Order Optical Susceptibility by Parametric Amplification of Polaron Mode in Doped Semiconductors with an Applied Magnetic Field, Praveen Aghamkar, Sunayana Shiwani, Guru Jambheshwar University, Hisar, INDIA
Largest second-order optical susceptibility (`28nm/V) has been calculated in a bulk semiconductor via parametric amplification of a polaron wave in the presence of a magnetic field. The analysis also predicts the possibilty of observing the parametric amplification in nInSb crystal under off-resonant transition regime.
 
CThE24 10:30 - 12:00
Suppression of Pulse Jitter in Synchronously Pumped Optical Parametric Oscillators, Giampaolo D'Alessandro, University of Southampton, Southampton, UK, Andrew Scroggie, Gian-Luca Oppo, University of Strathclyde, Glasgow, UK
We present numerical evidence of sensitivity to noise in a synchronously pumped singly resonant optical parametric oscillator in the pulse compression regime. We describe techniques for eliminating the noise-induced pulse jitter.
 
 
CThE25 10:30 - 12:00
Noise Assisted Binary Information Transmission in Vertical Cavity Surface Emitting Lasers, S. Barbay, Instituto Nazionale di Ottica Applicata, Firenze, ITALY, G. Giacomelli, Instituto Nazionale di Ottica Applicata, Firenze, ITALY, Francesco Marin, Universita di Firenze, Firenze, ITALY
We study the transmission of binary signals using a polarization bistable VCSEL. A high contrast output signal is obtained using a weak input, if an optimum amount of noise is added to the pump current.
 
 
CThE26 10:30 - 12:00
Kerr Nonlinearity Characterization Using Spectral Evolution of Dispersed Femtosecond Pulses, F. Louradour, V. Messager, E. Lopez-Lago, V. Couderc, Alain Barthelemy, IRCOM, Limoges , FRANCE
Experimental and theoretical studies of nonlinear spectral distortions induced on ultrashort pulses that have been preliminarily dispersed are used for the demonstration of the Kerr coefficient and nonlinearity time response of nonlinear optical materials.
 
 
CThE27 10:30 - 12:00
Integrated-Optical High-Power Amplitude Modulator for the Visible Wavelength Range in KTP, Ekkehard Werner, J.-P. Ruske, B. Zeitner, W. Biehlig, Andreas Tuennermann, Friedrich-Schiller-Universitaet - Jena, GERMANY
An electro-optical integrated asymmetric diffraction amplitude modulator in KTP for optical powers up to several watts and a modulation frequency in the hundred megahertz range operating in the visible spectral range is demonstrated.
 
CThE28 10:30 - 12:00
Auto-Solitons Guided by In-Line Nonliear Optical Loop Mirrors in Dispersion-Managed Communications Systems, Sonia Boscolo, Jeroen Nijhof, Sergei Turitsyn, Aston University, Birmingham, UK
We have examined optical pulse transmission in dispersion-managed fibre systems with in-line nonlinear optical mirrors. Applying simple theory and numerical analysis we have found regimes of a stable propagation over long distances in such lines.
 
 
CThE29 10:30 - 12:00
Two-Beam Noncollinear Maker Fringe Technique, Daniele Faccio, V. Pruneri, P. Kazansky, University of Southampton, Southampton, UK
A new technique to characterize second-order nonlinear films with sub-micron depth resolution is proposed. The potential of this method has been demonstrated in thermally-poled silica layers.
 
 
CThE30 10:30 - 12:00
Tailoring Diffraction: Linear and Nonlinear Applications, H.S. Eisenberg, Yaron Silberberg, Weizmann Institute of Science, Rehovot, ISRAEL, R. Morandotti, J. Stewart Aitchison, University of Glasgow, Glasgow, Scotland, UK
Arrays of waveguides present specific features that allow the modification, cancellation and reversal of the effect of diffraction. This leads to the possibility of engineering novel periodical structures and gives rise to a series of intriguing new linear and nonlinear properties.
 
 
CThE31 10:30 - 12:00
Nonlinear Conversion Processes in One-Dimensional Photonic Band Gap Structures: Blue and Green Light Emission, M. Centini, C. Sibilia, G. D'Aguanno, M. Bertolotti, Universita di Roma La Sapienza, Roma, ITALY, M. Scalora, M.J. Bloemer, C.M. Bowden, US Army Missile & Aviation Command, Redstone Arsenal, AL, USA
We study nonlinear quadratic interactions near the band edge of a finite length photonic band gap structure. We found that suitable geometry and conditions of interactions give rise to a strong enhancement of the nonlinear response: essential roles are played by the electromagnetic field localization and phase matching conditions. This opens the door to a new generation of very compact nonlinear devices. The blue and green light emission conditions are discussed.
 
 
CThE32 10:30 - 12:00
All-Optical Data Rate Conversion Using Coherent Transient Interactions, R. Krishna Mohan, Mikael Afzelius, Xiangjun Wang, Stefan Kroell, Nicklas Ohlsson, Lund Institute of Technology, Lund, SWEDEN
Photon-echo-based all-optical bit rate conversion by more than a factor of 100 is demostrated in rare-earth-ion-doped inorganic crytals. Several other exciting examples of all-optical signal processing in these materials will also be described.
 
 
CThE33 10:30 - 12:00
Optical Cell Compressor Using Semiconductor Optical Amplifier as Gate in TDM/WDM Photonic ATM Switching Systems, Kwang-Su Kim, Kyungtae Park, Kwang-Won Jeong, Jinseob Eom, Kangwon National University, Kangwon-Do, KOREA
In this paper, we propose a new type of optical cell compressor which is essential functional module in TDM or TDM/ WDM hybrid photonic ATM switching systems. The proposed structure drastically decreases required hardware by using optical feedback loop for optical pulse delay. We did the experiment of single stage 4 bits optical cell compression.
 
 
CThE34 10:30 - 12:00
Widely Tunable Difference Frequency Spectrometer with 200nm Continuously Tuning Range @ 3.2 up to 3.6µm, Michael Laschek, E. Poirot, F. Korte, C. Fallnich, H. Welling, Laser Zentrum Hannover e.V., Hannover, GERMANY
We present a tunable DFG spectrometer with a continuously modehop free tuning range of more than 200nm @ 3.2µm. The spectrometer is qualified by absorption measurements at methane.
 
 
CThE35 10:30 - 12:00
Unexpected Angular Dependence in ZnTe Electro-Optic Sampling, X. Yan, G.M.H. Knippels, D. Oepts, FOM Institute for Plasma Physics, Nieuwegein, THE NETHERLANDS
The field-induced transmission of a (110) ZnTe crystal between crossed polarizers was measured while the crystal was rotated in its plane. Six transmission maxima were observed on a 360° rotation. This result was confirmed by calculations.
 
 
CThE36 10:30 - 12:00
Simple Measuring Method for Electro-Optic Coefficients in Planar Optical Waveguides, A. Boudrioua, J.C. Loulergue, Universite de Metz et Supelec, Metz, FRANCE
A simple measuring method for the linear electro-optic coefficients in planar waveguides is presented. The technique is based on the modification of the resonant coupling angle into the waveguide when a voltage is applied.
 
 
CThE37 10:30 - 12:00
All-Optical Signal Grating in Cascaded Long-Period Fiber Gratings, Yoonchan Jeong, Seungin Baek, Jaejoong Kwon, Byoungho Lee, Seoul National University, Seoul, KOREA
We demonstrate an all-optical signal gating by means of Q-switched pump wave packets in cascaded long-period fiber grating using cross-phase modulation regime. Approximately 90% modulation depth was obtained with a pump intensity of 5 GW/cm2.
 
 
CThE38 10:30 - 12:00
Generation of Anti-Stokes Radiation in Barium Nitrate Raman Crystal, Vadim Skornyakov, Petr Zverev, Tasoltan Basiev, A.M. Prokhorov, General Physics Institute, Moscow, RUSSIA
Experimental results on the generation of anti-Stokes Raman radiation in barium nitrate crystal under pumping with second harmonic of Nd:YAG laser are presented. The energy in the first anti-Stokes component (l=504nm) was 3.3µJ and conversion efficiency up to 0.25%.
 
 
CThE39 10:30 - 12:00
Stability of Periodic Nonlinear Optical Structures for Limiting and Logic, Lukasz Brzozowski, Edward Sargent, University of Toronto, Toronto, ON, CANADA
We explore the boundary between multistable and stable regimes of operation in nonlinear periodic structures. We prove that in the stable regime the proposed structures exhibit true optical limiting for exploitation in logic, multi-wavelength signal-processing, and optical packet switching.
 
CThE40 10:30 - 12:00
Enhanced Performance of Nonlinear Optical Loop Mirrors Using SOAs with Robust Transparency, Jian Ming Tang, Paul Spencer, Paul Rees, K. Alan Shore, University of Wales, Bangor, Bangor, Wales, UK
Utilising long Transparent Semiconductor Optical Amplifiers (TSOA) in Nonlinear Optical Loop Mirrors (NOLMs) can considerably reduce the pump power dependence of the transparency carrier density and simultaneously significantly enhance the transmission of TSOA-NOLMs.
 
 
CThE41 10:30 - 12:00
Polarization Independent Nonlinear Optical Loop Mirror, E.A. Kuzin, N. Korneev, INAOE, Puebla, Pue., MEXICO, J.W. Haus, B. Ibarra-Escamilla, University of Dayton, Dayton, OH, USA
We examine the nonlinear polarization evolution on the Poincare sphere in a birefringent optical fiber with twist and apply this tool for a Nonlinear Optical Loop Mirror analysis. We find the parameters that make an input-state polarization independent device.
 
 
CThE42 10:30 - 12:00
On the Theory of Intra-Channel Four-Wave Mixing, Sergei Turitsyn, E.G. Turitsyna, V.K. Mezentsev, Aston University, Birmingham, UK, M.P. Fedoruk, Russian Academy of Sciences, Novosibirsk, RUSSIA
We present a path-average theory of intra-channel four-wave making (FWM) that is capable to describe initial growth, and slow, (path-average) evolution of FWM components.
 
 
Room: Mediterranee
CLEO/Europe Poster Session
 
CThE43 10:30 - 12:00
Noise Suppression of a Blue Upconversion Fiber Laser, Holger Zellmer, P. Riedel, Andreas Tuennermann, Friedrich-Schiller-Universitaet - Jena, Jena, GERMANY, I. Freitag, P. Rottengatter, InnoLight GmbH, Hannover, GERMANY
The amplitude noise and its suppression of 491 nm praseodymium-ytterbium fiber laser is presented. By applying feedback of the output power to the current of tte pump diode a noise reduction of up to 50dB can be achieved.
 
 
CThE44 10:30 - 12:00
An All-Fiber Phase Locking Setup for Multicore Fiber Lasers, Thomas Pertsch, Friedrich-Schiller-Universitaet - Jena, Jena, GERMANY, Peter Glas, Marc Wrage, Max-Born-Institute, Berlin, GERMANY, Falk Lederer, Friedrich-Schiller-Universitaet - Jena, Jena, GERMANY
A new mutlicore fiber laser phase-locking setup is introduced. It consists of mode selective fibre mirror which effectively suppresses all but the out of phase laser field.
 
 
CThE45 10:30 - 12:00
Buried-Channel Active Waveguide Array on ER:Yb:Phosphate Glass by Field-Assisted Ion - Exchange Technique, G. Sorbello, Stefano Taccheo, M. Marangoni, R. Osellame, Roberta Ramponi, Paolo Laporta, Orazio Svelto, Politecnico di Milano, Milano, ITALY, S. Jiang, Y. Hu, K. Seneschal, Nasser Peyghambarian, University of Arizona, Tucson, AZ, USA, F. Fusari, L. Brioschi, G. Ungaro, G. Chiaretti, Italtel, Castelletto di Settimo Milanese, ITALY, M. Lenzi, Optowave, Sesto S Giovanni, ITALY
A buried-channel active waveguide array on new Er-Yb phosphate glass has been fabricated by field-assisted ion-exchange technique. The single-transverse-mode waveguide present excellent optical quality with less than 0.1 dB/cm loss and 1.1 dB/cm gain at 1533.7 nm.
 
CThE46 10:30 - 12:00
Low-Noise Optical Amplifiers Using Polariton Transition, T. Katsuyama, M. Shirai, Hitachi Ltd., Tokyo, JAPAN, T. Higuchi, Y. Kohyama, Fuji Research Institute Corporation, Tokyo, JAPAN
Low-noise semiconductor optical amplifiers, where the signal is amplified between pump and squeezed idler polaritons, are proposed. The estimated noise figure for a 10dB-gain is only 0.42 dB when the squeezing level is 10%.
 
CThE47 10:30 - 12:00
Analytical Model for Homogeneous Upconversion in Er3+-Doped Waveguides, B. Jaskorzynska, S.V. Sergeyev, Royal Institute of Technology, Kista, SWEDEN
We propose an analytical model describing the recently observed nonlinear behaviour of the homogeneous upconversion in densely Er3+-doped devices.
 
 
CThE48 10:30 - 12:00
Modification of the Spontaneous Emission Process in Photonics Crystals, P. Roberts, Defense Evaluation & Research Agency, Malvern, Worcs., UK
The modification of the spontaneous emission rate in two-dimensional photonic crystal structures is examined. The studied crystals comprise arrays of parallel cylinders and may contain a defect. The rate modifications are compared with those which may be obtained using one-dimensional dielectric variations.
 
CThE49 10:30 - 12:00
Optical Properties of Rare Earth Doped Yttrium Oxide Waveguides, B. Viana, O. Pons-Y-Moll, N. Degory, E. Antic-Fidancev, ENSCP, Paris, FRANCE, E. Millon, J. Perriere, C. Belouet, Universite Paris VI et Paris VII, Paris , FRANCE
Rare-earth doped (europium,erbium and Er/Yb) and undoped yttrium oxide crystallised planar waveguide structures have been elaborated by pulse laser deposition technique (PLD). Thin films obtained presents good luminescence and propagation is evidenced by M-lines spectroscopy.
 
CThE50 10:30 - 12:00
High Power Side Pumped Unidirectional Ring Yb-Doped Double-Clad Fibre Laser, Ammar Hideur, Thierry Chartier, Francois Sanchez, Universite de Rouen, Monte-Saint -Aignan , FRANCE, Marc Le Flohic, OPTOCOM Innovation, Lannion
We report a high power Yb-doped double-clad fibre laser in a unidirectional ring cavity using the v-groove side-pumping technique. It delivers up to 1.5 W and exhibits a stable output intensity.
 
CThE51 10:30 - 12:00
Multiple Wavelength Operation of Distributed Feedback Fibre Lasers, Sigurd Lovseth, Norwegian University of Sci & Tech, Trondheim, NORWAY, Dmitrii Stepanov, University of Sydney, Eveleigh, NSW, AUSTRALIA
The behavior of multi-wavelength distributed feedback fibre lasers is simulated. Multiple fundamental modes can coexist even though the coupling coefficients of their respective refractive index gratings are not equal, due to the induced gain gratings.
 
CThE52 10:30 - 12:00
Generation of Multiwavelength Pulses from an Erbium-Doped Fibre Laser, Stephane Calvez, Pascal Mollier, Jean-Pierre Goedgebuer, GTL-CNRS Telecom, Metz, FRANCE
We demonstrate a novel method to create trains of up to eight pulses where each pulse has its own wavelength. It is achieved using intracavity wavelength modulation inside an erbium-doped fibre laser.
 
CThE53 10:30 - 12:00
Jitter and Stability Analysis of an Actively Mode-Locked Dispersion-Managed Fibre Laser, Suttawassuntorn Waiyapot, Masayuki Matsumoto, Osaka University, Osaka, JAPAN
We study the dependence of timing and energy jitter of an actively mode-locked dispersion-managed fibre laser on the strength of the dispersion management. Stability of the laser against linear-mode growth is also discussed.
 
CThE54 10:30 - 12:00
Stimulated Raman Scattering in a Fibre with Bending Loss, E.A. Kuzin, INAOE, Puebla, Pue., MEXICO, R. Rojas-Laguna, Universidad de Guanajuato, Salamanca, Gto., MEXICO
Stimulated Raman Scattering was investigated in a single mode fibre with bend-induced loss. Steep wavelength dependence of loss was used to suppress higher order Stokes. In experiment we achieved rectangular Stokes pulses with higher intensity.
 
CThE55 10:30 - 12:00
Self-Similar Propagation of Parabolic Pulses in High Gain Optical Amplifiers, V.I. Kruglov, John Dudley, B.C. Thomsen, J.D. Harvey, University of Auckland, Auckland, NEW ZEALAND, Martin Fermann, IMRA America, Inc., Ann Arbor, MI, USA
We describe an exact solution of the nonlinear Schroedinger equation for asymptotic pulse evolution in optical fibre amplifiers. The solution is a linearly-chirped parabolic pulse which propagates self-similarly subject to simple scaling rules.
 
CThE56 10:30 - 12:00
Numerical Modeling and Optimisation of Cascaded CW Raman Fibre Lasers, Matteo Rini, Ilaria Cristiani, Vittorio Degiorgio, Universita di Pavia, Pavia, ITALY
We present a numerical model which describes a cascaded fibre Raman laser in nested cavities, by considering all interactions between forward and backward waves. We determine the optimum cavity configuration and the dependence of the output power on the pump power.
 
CThE57 10:30 - 12:00
Modeling Output-Photon-Statistics of Erbium-Doped Fibre-Amplifiers and Amplifier Chains, Malin Premaratne, Iven Mareels, Kai Song, University of Melbourne, Parkville, Victoria, AUSTRALIA
We present a quasi-analytical model for characterizing the output-field photon-statistics of nonlinear Erbium-doped fibre amplifiers and amplifiers-chains with arbitrary input-fields statistics. All the available results on output-photon-statistics of linear amplifiers can be derived as a special case of the present nonlinear theory.
 
 
CThE58 10:30 - 12:00
Photonic Crystal Waveguides - A New Building Block for Photonic Circuits, Christopher Smith, University of Glasgow, Glasgow, Scotland, UK, S. Olivier, Maxime Rattier, H. Benisty, Ecole Polytechnique, Palaiseau, FRANCE, Thomas Krauss, University of Glasgow, Glasgow, Scotland, UK, C. Weisbuch, Ecole Polytechnique, Palaiseau, FRANCE
We present qualitative and quantitative characteristics of 2-dimensional photonic crystal waveguides fabricated in a GaAs/AlGaAs slab waveguide. Specifically, we show a mode coupling effect particular to the high refractive-index contrast corrugation of the waveguide boundaries.
 
CThE59 10:30 - 12:00
Angular Frequency Dependence for a Planar Cavity Defect Introduced into a 2-Dimensional Photonic Crystal, Andrew Reynolds, University of Glasgow, Glasgow, Scotland, UK
Modeling and experiment show that the defect frequency response of a photonic crystal with a planar cavity is dependent on the external angle of incidence.
 
CThE60 10:30 - 12:00
Macroporous Silicon: Photonic Crystal Substrates at 1.55µm, D. Chelnokov, S. Rowson, S. David, CNRS, Orsay, FRANCE, J-M. Lourtioz, Universite Paris-Sud, Paris Orsay, FRANCE
The large areas covered by the macroporous silicon photonic crystal with a bandgap at 1.55µm foresee possibilities of high density integrated devices at telecommunication wavelengths. A technological realisation of a macroporous silicon planar waveguide is presented.
 
CThE61 10:30 - 12:00
Grating Theories for the Analysis of Photonic Waveguides, Eric Silberstein, Philippe Lalanne, Institut d'Optique, Orsay , FRANCE
We show that, with only a very few modifications, grating theories can be used efficiently for the numerical analysis of waveguide problems. Especially photonic-bangap waveguide problems.
 
CThE62 10:30 - 12:00
Tunable Photonics Crystals with Semiconducting Constituents, F. Ramos-Mendieta, Universidad de Sonora, Sonora, MEXICO, P. Halevi, Instituto Nacional de Astrofisica, Puebla, MEXICO
We proposed that the photonic band structure (PBS)of semiconductor-base photonic crystals can be made tunable if the free-carrier density is sufficiently high. The dielectric constant of the semiconductor is frequency-dependent, and also depends on the temperature T and the impurity concentration N through the plasma frequency.
 
 
CThE63 10:30 - 12:00
Ultra-Thin, Laterally Injected Light-Emitting Diodes - The Role of Photonic Crystals for Light Extraction, Maxime Rattier, Ecole Polytechnique, Palaiseau, FRANCE, Thomas Krauss, University of Glasgow, Glasgow, Scotland, UK, H. Benisty, Ecole Polytechnique, Palaiseau, FRANCE, Christopher Smith, University of Glasgow, Glasgow, Scotland, UK, C. Weisbuch, Ecole Polytechnique, Palaiseau, FRANCE, R. Houdre, EPFL, Lausanne, SWITZERLAND, U. Oesterle, Ecole Polytechnique, Palaiseau, FRANCE
We demonstrate the operation of ultra-thin,laterally injected-emitting diode based on a vertical microcavity with oxidized AIAs mirrors. We highlight the design aspects of optimizing both carrier injection and optical extraction via photonic crystals.
 
 
CThE.64 10:30 - 12:00
Surface-Plasmon Enhanced Optical Transmission Through Subwavelength Apertures in Metal Films, Tineke Thio, NEC Research Institute, Princeton, NJ, USA, H.J. Lezec, Universite Louis Pasteur, Strasbourg, FRANCE, D.E. Grupp, K.M. Pellerin, NEC Research Institute, Princeton, NJ, USA, T.W. Ebbesen, Universite Louis Pasteur, Strasbourg, FRANCE
We present direct evidence of the importance of surface plasmons in the enhanced transmission through subwavelength holes, in perforated free-standing metal membranes in which we control independently the dielectric properties of the film core and surfaces.
 
 
CThE.65 10:30 - 12:00
Spontaneous Emission Rates Inside an Omni-Directional Mirror, Christa Hooijer, Daan Lenstra, Ad Lagendijk, Vrije Universiteit, Amsterdam, THE NETHERLANDS
We find calculations that the total spontaneous emission rate fro a quantum well in a planar omnidirectional mirror is only slightly modified, but the angular distribution of the emitted light has significantly changed.
 
 

 
 
IQEC POSTERS
 
 
Room: Mediterranee
IQEC Poster Session
 
QThD1 10:30 - 12:00
Weakly Nonparaxial Spatial Optical Solitons, N.N. Rosanov, Institute for Laser Physics, St. Petersburg, RUSSIA
Starting from the full set of nonlinear Maxwell's equations, and using perturbation theory approach with radiation beam width as a large parameter, weakly nonparaxial vector equations are derived and analysed for spatial optical solitons.
 
 
QThD2 10:30 - 12:00
Transverse Fourier Mode Selection in VCSELs due to DBR Reflectors, N. A. Loiko, Academy of Sciences, Minsk, BELARUS
Dependence of tilted waves reflection from DBR structures leads to a periodic pattern formation in VCSELs. This mode selection mechanism depends on a position of an active layer in the cavity.
 
 
QThD3 10:30 - 12:00
Nonsymmetrical Spatial Soliton Formation in the System of Two Nonlinear Thin Films, I. V. Babushkin, N. A. Loiko, Yu. A Logvin, Academy of Sciences, Minsk, BELARUS
The system comprising of two non linear thin films irradiated from both sides by monochromatis light is considered. It is shown that interplay of subcritical pitchfork symmetry-breaking bifurcation and a pattern-forming instability gives rise to the formation of symmetry-breaking solitonlike structures below the onset for the above instabilities.
 
 
QThD4 10:30 - 12:00
Elecromagnetically Induced Transparency in Doppler-Broadened Three-Level Systems with Resonant Standing Wave Drive, F Silva, Universitat de Valencia, Burjassot, SPAIN, J Mompart, V Ahufinger, R Corbalan, Universitat Autonoma de Barcelona, Bellaterra, SPAIN
We show that resonant standing wave drive of a Doppler broadened system induces windows of transparency for a traveling wave probe coupled to an adjacent transition, whenever the probe to driving frequency ratio is close to half integer values.
 
QThD5 10:30 - 12:00
Novel Optical Bistability and Hysteresis in Multiple-Quantum-Well, Gary Chen, Ching-Fuh Lin, Miin-Jang Chen, Bor-Lin Lee, National Taiwan University, Taipei, TAIWAN, R.O.C.
Behaviors of bistability and hysteresis are discovered in semiconductors lasers with multiple quantum wells of different widths. Unlike the conventional multi-section laser diodes, such laser exhibits bistability without the necessity of multiple sections or electrodes.
 
 
QThD6 10:30 - 12:00
Optical Bi- and Tri-Stability by Excitation of Surface Electromagnetic Waves at Boundaries of One- and Two-Photon Resonant Media, L. M. Kocharyan, Yerevan State University, Yerevan, ARMENIA
The theory of optical bi- and tri-stability at the excitation of surface electromagnetic waves via Kretschmann attenuated total reflection scheme (glass prism-metal film-dielectric) in which the dielectric exhibits a relatively small one- or two- photon resonant nonlinearity is presented.
 
 
QThD7 10:30 - 12:00
Local Field Effects on the Spatiotemporal Dynamics of Broad-Area Three-Level Lasers, J Mompart, SPAIN, V Ahufinger, R Corbalan, Universitat Autonoma de Barcelona, Bellaterra, SPAIN, J Garcia-Ojalvo, M.C. Torrent R. Vilasecafrom, Universitat Politecnica de Catalunya, Terrassa, SPAIN
We investigate local field effects on the spatiotemporal dynamics of broad-area homogeneously broadened three-level laser. Among other effects, local field corrections reduce the pumping threshold for pattern formation while increasing the transverse wavevector nonlinearity is presented.
 
QThD8 10:30 - 12:00
Dynamics of a Frequency-Doubling Microchip Laser Subject to External Optical Injection, Evguenii Larionstev, Igor Zolotoverkh, Moscow State University, Moscow, RUSSIA
Dynamics of an injected microchip laser generating the second harmonic inside its doubly resonant cavity is considered. Two bistable branches of locked and unlocked states and injection-induced switching of the laser states are analysed. The new relaxation-oscillation frequency caused both by the nonlinear phase shift and the injected field has been discovered.
 
QThD9 10:30 - 12:00
Modelling the Interaction of Hot Atoms with Strong Electromagnetic Fields, Gian Luca Lippi, M Perrin, Institut Non Lineaire de Nice, Valbonne, FRANCE, A Politi, Istituto Nazionale di Ottica Applicata, Firenze, ITALY
Collisions with the buffer gas have been introduced into the standard model that describes the interaction between atoms and a strong electromahnetic field. Numerical simulations for the stochastic, and their corresponding probabilistic, equations are presented.
 
QThD10 10:30 - 12:00
Nonlinear Dynamics of Multi-Transverse Mode Vertical-Cavity Surface-Emitting Lasers, A. Valle, S. I. Turovets, Luis Pesquera, Instituto de Fisica de Cantabria, Santander, SPAIN
Nonlinear dynamics of current modulated index guided VCSELs in a multitransverse mode regime is analysed. Multistability of chaos type is found. Switching from one to another chaotic attractor is obtained by injecting optical pulses.
 
QThD11 10:30 - 12:00
Transverse Polarization Laser Dynamics: Vector Modes of Karhunen-Loewe and Their Classification Using Catastrophe Theory, I. V. Veshneva, Leonid Melnikov, Audrey Konukhov, M. V. Ryabinina, Saratov State University, Saratov, RUSSIA
The polarization-transverse-pattern dynamics of the Zeeman laser with image-rotating cavity was simulated numerically. Karhunen-Loewe vector modes were introduced. The different kinds of catastrophes were observed.
 
QThD12 10:30 - 12:00
Stable Bounded Autosoliton States in a Laser with a Saturable Absorber, A. G. Vladimirov, G. V. Khodova, St. Petersburg State University, St. Petersburg, RUSSIA, N.N. Rosanov, Institute for Laser Physics, St. Petersburg, RUSSIA
Differential equations governing the interaction of two weakly overlapping autosolitons in the transverse section of a wide aperture laser with a saturable absorber are dervied and analyzed. The existence of stable in-phase and out-of phase stable bounded autosoliton states is predicted analytically and verified numerically.
 
QThD13 10:30 - 12:00
The Transverse-Polarization Dynamics of Laser: Polarized Optical Vortices and Their Soliton-Like Behaviour, Audrey Konukhov, Leonid Melnikov, Saratov State University, Saratov, RUSSIA
The nonlinear dynamics of polarized optical vortices was numerically investigated. New approaches to the characterization of the vortical topological structure are introduced.
 
QThD14 10:30 - 12:00
Laser-Induced Giant Deformation of a Liquid-Liquid Interface, A Casner, A. Ducasse, Jean Pierre Delville, Universite Bordeaux 1, Talence, FRANCE
We experimentally investigate the deformation of a liquid-liquid interface under the light presusre of c.w. laser wave and we describe a new finger instability resulting from the beam propagation through the induced bulge.
 
 
QThD15 10:30 - 12:00
Parametric Instability of Mode Beating and Self-Mode-Locking in a Class-B Fiber Laser, V.V. Kocharovsky, Texas A&M University, College Station, TX, USA, VI. V Kocharovsky, Russian Academy of Sciences, Nizhny Novgorod, RUSSIA
Recent observations of low-threshold self-mode-locking in a long homogeneously-broadened fiber laser are attributed to the parametric resonance and beat-frequency-locking of paired hot modes taking place due to coherent nonlinear effects in the active two-level medium.
 
 
QThD16 10:30 - 12:00
Pulsating Intensities in External Cavity Semiconductor Lasers, Vassilios Kovanis, Athanasios Gavrielides, AFRL/DELO, Kirtland AFB, NM, USA, T. Erneux, Universite Libre de Bruxelles, Bruxelles, BELGIUM
We investigate the dynamics of short external cavity diode lasers, with the Lang and Kobayashi model. We find regions of parameter space that the diode laser undergoes a subcritical Hopf bifurcation resulting in pulsating intensities.
 
 
QThD17 10:30 - 12:00
Enhancements of the Optical Nonlinearity in Liquid Crystals Through the Photovoltaic Effect, O. Francescangeli, L. Lucchetti, F. Simoni, S. Slussarenko, Universita di Acona, Ancona, ITALY
In this presentation we report a detailed study of the transient behavior of the photovoltaic effect detected in dye doped 5CB cells homeotropically aligned, using both c.w. and pulsed light excitation.
 
 
QThD18 10:30 - 12:00
Localized Structures and Spatial Correlations in Lasers with Mulitphoton Emission, J Garcia-Ojalvo, M.C. Torrent, Terrassa, SPAIN, Ramon Vilaseca, Universidad Politecnica de Catalunya, Terrassa, Barcelona, SPAIN, Maxi San Miguel, Universidad de las Islas Baleares, Palma de Mallorca, SPAIN, Massimo Brambilla, Universita Politecnico di Bari, Bari, ITALY
The spatiotemporal dynamics of cascade lasers with coexisting one- and two- photon emission is investigated. These systems exhibit spontaneous emergence of localized structures. Additionally, two photon processes lead to significant correlations between the emitted spatial patterns.
 
QThD19 10:30 - 12:00
Polarization Changes in Planar Waveguide in the Presence of Stimulated Scatterings (Rayleigh, Raman), V. Boucher, R. Barille, X. Nguyen Phu, Laboratoire POMA, Angers , FRANCE
We have observed in a planar waveguide strong polarization changes near and above the soliton power. We compare the influence of Stimulated Rayleigh Wing Scattering (SRWS) and Stimulated Raman Scattering (SRS) on the propagation in waveguide filled with
different nonlinear materials. These observations yield to important imformations on the modes coupling in nonlinear waveguide.
 
 
QThD20 10:30 - 12:00
Bandwidth-Enhanced Quadratic Soliton Formation by On-Sample Single-Band Amplification, Silvia Carrasco, Lluis Torner, Universitat Politecnica de Catalunya, Barcelona, SPAIN
Formation of optical soliton in quadratic nonlinear media under conditions for second-harmonic generation is investigated numerically in the presence of linear amplification at the fundamental frequency band. We show that both, the efficiency and the bandwidth of soliton excitation can be importantly enhanced by the on-sample amplification. Implementation conditions in erbium-doped periodiaclly-poled lithium niobate are discussed.
 
QThD21 10:30 - 12:00
Control of the Nonlinear Polarisation Dynamics in a Semiconductor Waveguide with a Periodic Magnetic Field, David Hutchings, J.M. Arnold, University of Glasgow, Glasgow, Scotland, UK
The influence of a longitudinal magneto-optic effect on the nonlinear in a semiconductor waveguide is studied. Optical polarisation evolution can be selected with a periodic modulation of the magnetic field.
 
QThD22 10:30 - 12:00
Bright and Dark Spatial Solitons in a Nonlocal Kerr-Like Medium, Wieslaw Krolikowki, Barry Luther-Davies, D. Edmundson, Australian National University, Canberra ACT, AUSTRALIA, O. Bang, Tech University Denmark, Lyngby, DENMARK, A. Kujawski, Warsaw Institute of Technology, Warsaw, POLAND
We investigate properties of 1D bright and dark spatial solutions in a nonlocal Kerr-like medium. We found an exact analytical solitons to the nonlinear propagation equation in case of weak nonlocality. We show that nonlocal solitons are stable in propagation but their collisions are inelastic.
 
QThD23 10:30 - 12:00
Observation of Chaotic Oscillation in a Diode-Pumped Nd:YAG Microchip Laer Array with an External Mirror, Y. Shimamura, Atsushi Uchida, T. Ogawa, Masahiko Shinozuka, Fumihiko Kannari, Keio University, Yokohama, Kanagawa, JAPAN
We experimentally observed chaotic burst in a Nd:YAG microchip laser array which are mutually coupled with diffracted feedback light from an external mirror. Sychronization of chaos among the array outputs is achieved.
 
QThD24 10:30 - 12:00
Interaction of Laser Bullets, N. Kaliteevskij, N.N. Rosanov, Institute for Laser Physics, St. Petersburg, RUSSIA
We study numerically collisions of two laser bullets - three-dimensional dissipative localized radiation structures in continuous media with saturable gain and absorption and frequency dispersion.
 
QThD25 10:30 - 12:00
Super and Sub-Critical HOPF Birfurcation Leading to Chaos: Theory and Experiments, Laurent Larger, Laboratoire d'Optique, Beancon, FRANCE, T. Erneux, Universite Libre de Bruxelles, Bruxelles, BELGIUM
Super-and sub-critical Hopf bifurcations are theoretically analyzed for the general class of systems described by delayed differentail equation. Experiments based on an optoelectronic oscillator are presented.
 
QThD26 10:30 - 12:00
Coherent Control of the Polarization of Optical Pulses Using Electromagnetically Induced Transparency, Daisuke Fujishima, M. Takeoka, Fumihiko Kannari, Keio University, Yokohama, Kanagawa, JAPAN
We numerically studied a novel scheme to control coherently the polarization state of an optical probe pulse with the quantum coherence induced by a coupling field.
 
QThD27 10:30 - 12:00
Criteria for Synchronization of Chaotic Diode Lasers, Luis Pesquera, J. Revuelta, Instituto de Fisica de Cantabria, Santander, SPAIN, Claudio Mirasso, Pere Colet, Universidad de las Islas Baleares, Palma de Mallorca, SPAIN
We obtain the region of parameters at which synchronization between two external-cavity chaotic laser diodes is possible. We show the existence of a minimum coupling and an optimum one, above which synchronization degrades.
 
QThD28 10:30 - 12:00
Femtosecond Beats in the Blue Fluorescence of Rubidium Atoms, Daniel Felinto, Lucio Acioli, Sandra Vianna, Universidade Federal de Pernambuco, Pernambuco, BRAZIL
Femto-and pico-second beats are observed in the emission of rubidium atoms when the system is excited by pairs of femotosecond pulses with a variable relative delay and double resonant with a sequential atomic transition.
 
 
QThD29 10:30 - 12:00
Optical Nutation with Population Inversion on Raman Transition at Pulse Biharmonic Excitation, S. Anikeev, V. Kulyasov, V. Morozov A. Olenin, V. Tunkin, M.V. Lomonosov Moscow State University, Moscow, RUSSIA
Optical nutation accompanied by considerable, up to inverse, population changes was observed in thallium atoms. Picosecond pulses with frequency difference tuned close to the Raman frequency excited the transition. Polarization and upper level population were monitored by probing pulses. AC Stark shift resulted in additonal frequency detuning.
 
QThD30 10:30 - 12:00
Turning Patterns in Nonlinear Optics, Kestutis Staliunas, Physikalisch-Technische Bundesanstalt, Braunschweig, GERMANY, Victor Sanchez-Morcillo, Universitat de Valencia, Burjassot, SPAIN
We report a novel local activation and lateral inhibition pattern formation mechanism in nonlinear optics. The mechanism is based on interplay of nonlocalities (diffraction and /or diffusion) of interacting field components, and is determined for lasers and optical parametric oscillators.
 
QThD31 10:30 - 12:00
Second Harmonic Generation and the Dynamics of Optical Excitation in Small Particles, David Andrews, Luciana Davila-Romero, University of East Anglia, Norwich, UK
At high levels of optical excitation, local coherence in domains of mesoscopically disordered materials produces second harmonic emision whose temporal signature characterizes the excited state population. The signal affords an experimental test of time-reversal symmetry.
 
 
QThD32 10:30 - 12:00
Genesis of Walking Optical Solitons in Semiconductor Lasers by Nonlinear Spatio-Spectral Pulse-Trapping, Edeltraud Gehrig, Ortwin Hess, DLR - Institute of Technical Optoelectronics, Stuttgart, GERMANY
The formation and propagation of optical solitons by microscopic spatio-spectral wave-mixing of ultrashort pulses in semiconductor lasers are numerically analyzed on the basis of space-dependent Maxwell-Bloch-Langevin-equations including amplified spontaneous emission, hole buring and carrier heating.
 
QThD33 10:30 - 12:00
Enhanced X(2) Interactions Near the Band-Edge of Finite, One - Dimensional Photonic Gap Structures, G. D'Aguanno, M. Centini, C. Sibilia, M. Bertolotti, Universita di Roma La Sapienza, Roma, ITALY, M. Scalora, M.J. Bloemer, C.M. Bowden, US Army Missile & Aviation Command, Redstone Arsenal, AL, USA, J.W. Haus, University of Dayton, Dayton, OH, USA
By multiple scale expansion approach, we demonstrate that simultaneous availability of high fields localization and phase matching conditions near the band edge are responible for a surprisingly enhancement of the quadratic X(2) response.
 
QThD34 10:30 - 12:00
One-Dimensional Photonic Band-Gap Structures: Control of Reflectivity Via Parametric Nonlinear Interaction Processes, M. Centini, C. Sibilia, G. D'Aguanno, M. Bertolotti, Universita di Roma La Sapienza, Roma, ITALY, M. Scalora, M.J. Bloemer, C.M. Bowden, US Army Missile & Aviation Command, Redstone Arsenal, AL, USA
We show that it is possible to control the nonlinear reflectivity of an input pulse at the fundamental frequency induced by a nonlinear quadratic interaction in one dimensional photonic band gap structures, under parametric amplification process. We find the enhancement of gain near the band edge, coupled with a suitable choice of the relative phase between the input pulses, lead to significant reflectivity and transmittivity change of the inout pump pulse for structures only a few microns in length.
 
QThD35 10:30 - 12:00
Size Dependent Electron Interactions in Metal Nanoparticles, D Voisen, D. Christofilos, D. Del Fatti, F. Vallee, Laboratoire d'Optique, Palaiseau , FRANCE, E. Cottancin, J. Lerme, B. Prevel, LASIM, Villeurbanne , FRANCE
The electron-electron and electron-lattice thermalization dynamics are investigated in silver nanoparticles with radius ranging from 13 to 1.6 nm using a femtosecond pump-probe technique. A sharp confinement induced increase of the electron-electron scattering rate is demonstrated for particles smaller than 5nm, with a similar behavior for the electron-phonon interaction.
 
 
QThD36 10:30 - 12:00
Molecular Dynamics Model for Ultrafast Laser Ablation of Metal, Etsuji Ohmura, Ichirou Fukumoto, Isamu Miyamoto, Osaka University, Suita, Osaka, JAPAN
Abstract not available.
 
 
QThD37 10:30 - 12:00
Influence of Correlations on Intensity Dependent Excitonic Absorption Changes, Torsten Meier, Stephan Koch, Philipps University, Marburg, GERMANY, P. Brick, Claudia Ell, Galina Khitrova, Hyatt Gibbs, University of Arizona, Tucson, AZ, USA
Excitonic differential absorption spectra are studied for different pump intensities and detunings. Experimental results obtained on high-quality InGaAs quantum wells can be described by microscopic calculations including Coulomb correlations up to fifth order.
 
QThD38 10:30 - 12:00
Study of Carrier Dynamics in LT GaAs by Means of Time-Resolved Emission Terahertz Spectroscopy, H Nemec, Petr Kuzel, Academy of Sciences, Prague 8, CZECH REPUBLIC, M Khazan, S. Schnuell, Ingrid Wilke, Universitaet Hamburg, Hamburg, GERMANY
The photoexcited carrier dynamics was measured in low-temperature grown GaAs samples by means of terahertz emission spectroscopy through terahertz waveform analysis. The results are interpreted in terms of kinetic equations for the photo-carriers.
 
QThD39 10:30 - 12:00
Exciton Annihilation Dynamics in Biological and Artificial Antenna Systems, Ben Brueggemann, Volkhard May, Humboldt University, Berlin, GERMANY
A multi-exciton density matrix theory is used to simulate ultrafast spectra of photosynthetic antennae and dendrimers taken at higher excitation intensities. The signatures of exciton annihilation are discussed in detail.
 
QThD40 10:30 - 12:00
Self-Phase Modulation and Compression of Few-Optical-Cycle Pulses, V.P. Kalosha, A. V. Gusakov, J. Herrmann, Max-Born-Institute, Berlin, GERMANY
The propargation of few-optical cycle pulses through fused silica and argon is studied theoretically without usually used approximations. It is shown that phase-controlled half-cycle pulses with a FWHM as short as 0.5 fs can be generated by the application of a liquid-crystal modulator.
 
 
QThD41 10:30 - 12:00
Analysis of Disorder-Induced Dephasing, S. Weiser, Torsten Meier, J. Moebius, A. Euteneuer, E. Mayer, W. Stolz, M. Hofmann, W. Ruehle, P. Thomas, Stephan Koch, Philipps University, Marburg, GERMANY
Microscopic model calculation including energetic disorder and Coulomb correlations up to third-order in the laser field are performed. The four-wave-mixing signals show polarization-dependent disorder-induced dephasing in qualitative agreement with experiment.
 
QThD42 10:30 - 12:00
Spatio-Temporal Dynamics of Optically Excited Excitonic Wavepackets in Smiconductor Quantum Wells, Steffen Kuckenburg, A Knorr, Stephan Koch, Philipps University, Marburg, GERMANY
A theory of the spatio-temporal dynamics of quantum well excitons on short time and space scales is presented. For spatially localized optical excitation the dynamics of excitonic wavepackets is investigated.
 
QThD43 10:30 - 12:00
Anisotrophy Decay of Solvated and Isolated Photofragments, A. P. Blokhin, M. F. Gelin, National Academy of Sciences of Belarus, Minsk, BELARUS
A theory is presented for the description of the photofragment anisotrophy decay, both for isolated and solvated species. Its predictions are tested against the results of spectroscopic experiments and computer simulations.
 
QThD44 10:30 - 12:00
Mode Superfluorescence of Two-Level and Quasi-Classical Systems in a Bad Cavity and Without Cavity, N. S. Ginzburg, E. R. Kocharovskaya, Russian Academy of Sciences, Nizhny Novgorod, RUSSIA, V.V. Kocharovsky, Texas A&M University, College Station, TX, USA, VI. V Kocharovsky, Russian Academy of Sciences, Nizhny Novgorod, RUSSIA
A theory of mode superfluorescence in systems with two-level and quasi-or equidistant energy spectra in the bad-cavity limit is developed, and correlations between counterpropagating waves due to resonance reflections from facets of an open inverted medium are investigated.
 
QThD45 10:30 - 12:00
Nonperturbative Analysis of the Femtosecond Spectal Diffusion Processes in Molecular Complexes, Eugenijus Gaizauskas, Vilnius University, Vilnius, LITHUANIA
Transient effects in molecular spectra (delay-dependent Stokes shift, electronic coherence transfer, vibrational quantum beats) are displayed when treating interaction of the hot (excited) molecule with its thermal environment in the framework of the Redfield theory.
 
QThD46 10:30 - 12:00
Modification of the Beam Profile from Semiconductor Lasers by Spatial Manipulation of an Optical Feedback Field, D.M. Kane, V. G. Ta'eed, Macquarie University, Sydney, NSW, AUSTRALIA
The output beam profile of a laser diode with optical feedback arises from interference of the emitted and feedback fields at the laser diode facet.
 
QThD47 10:30 - 12:00
Transient Studies of Transparency and Gain in Laser-Cooled Rubidium Lambda Systems, Sebastian De Echaniz, A. D. Greentree, A. V. Durrant, The Open University, Milton Keynes, UK, J. P. Marangos, D. M. Segal, J Vaccaro, Imperial College Science Tech & Medicine, London, UK
An experimental investigation is reported of transient effects in the approach to steady-state electromagnetically induced transparency in a rubidium magneto-optical trap following fast non-adiabatic switch-on of the coupling field.
 
QThD48 10:30 - 12:00
Observation of Vacuum Ultraviolet Stimulated Emission of Krypton Excimer Molecules at 147 nm Excited by a Transverse Discharge, Shoichi Kubodera, Kosaku Nakajima, Wataru Sasaki, Atsushi Yokotani, Kou Kurosawa, Miyazaki University, Miyazaki, JAPAN, Tatsushi Igarashi, USHIO Inc., Miyazaki, JAPAN
We have observed a considerable spectral narrowing of krypton excimer emission excited in a stimulated compact transverse discharge devise,which strongly indicates the stimulated emission of the molecules centered at 147 nm.
 
 
QThD49 10:30 - 12:00
Narrowband Tunability of a Pulsed Optical Parametric Oscillator Pumped by a Low-Cost Multimode Pump Laser, Brian Orr, Macquarie University, North Ryde, NSW, AUSTRALIA, Yabai He, Macquarie University, Sydney, NSW, AUSTRALIA
We report a compact, low-cost injection-seeded quasi-phasematched optical parametric oscillator system incorporating a pulsed, multimode pump laser and an actively controlled ring cavity. Narrowband, single-mode tunability of its signal radition is verified spectroscopically.
 
QThD50 10:30 - 12:00
Pulsed, Tunable 900-1100 nm Lasers: LiF:F2+ Versus Ti3+ :Sapphire, Chris Rawle, University of Otago, Dunedin, NEW ZEALAND, Iain McKinnie, Coherent Technologies, Inc., Boulder, CO, USA, Valerii Ter-Mikirtychev, Science & Engineering Services, Inc., Burtonsville, MD, USA, Weston Sandle, University of Otago, Dunedin, NEW ZEALAND
Room-temperature LiF:F2+ color center lasers tunable in the 900-1100 nm range provide lower threshold, broader tuning, higher pulse energies and higher peak powers than Ti:sapphire lasers. Amplified spontaneous emission effects are eliminated by pump pulse stretching.
 
 
QThD51 10:30 - 12:00
The Kinetic Effects of HBr Partial Pressure and Gas-Flow Rate in Cu HyBrID Lasers, Richard Mildren, R. Carman, Macquarie University, Macquarie, NSW, AUSTRALIA, J. Piper, Macquarie University, North Ryde, AUSTRALIA
We report time-resolved measurements of Cu2S1/2 Density as functions of HBr partial pressure and buffer-gas flow rate in a Cu HyBrID laser. The mechanisms determining the free Cu density, interpulse plasma relaxtion rate and limits for sealed off operation are discussed.
 
QThD52 10:30 - 12:00
Lasing Without Inversion in Three-Level Systems Without External Coherent Driving, V Ahufinger, J Mompart, R. Corbalan, Universitat Autonoma de Barcelona, Bellaterra, SPAIN
We study an incoherently pumped laser operating with a Doppler-broadened three-level system placed in a doubly resonant cavity. This system can generate two laser fields, one of them without population inversion. Both ladder and V-type schemes are considered.
 
QThD53 10:30 - 12:00
Novel, Single Longitudinal Mode, Near Infrared Gain-Switched Lasers, J.C. Diettrich, University of Otago, Dunedin, NEW ZEALAND, Iain McKinnie, Coherent Technologies, Inc., Boulder, CO, USA, Don Warrington, University of Otago, Dunedin, NEW ZEALAND
Efficient single longitudinal mode operation is demostrated using two new, low-loss, multi-arm, coupled laser resonators, based on Michelson-Fox-Smith grazing incidence and Littrow cavities. Pulse energies of 1.5 mJ in Cr:forsterite and 2.6 mJ in Ti:sapphire are obtained.
 
QThD54 10:30 - 12:00
Effect of End Reflectivity on Statistical Properties of Light Generated by Circular Grating DBR Laser, A Tyszka-Zawadzka, Tomasz Kossek, Warsaw University of Technology, Warsaw, POLAND, Pawel Szczepanski, National Institute of Telecommunications, Warsaw, POLAND, Michal Malinowski, Warsaw University of Technology, POLAND
We analyze an influence of the complex end reflectivity on statistical properities of light generated by circular grating DBR laser. In our model the stochastic approach based on the Fokker-Planck equation is used.
 
QThD55 10:30 - 12:00
Efficient Generation of Narrow-Linewidth THz Waves from Multilayers Pumped by Electron Beam, Yujie Ding, University of Arkansas, Fayetteville, AR, USA
For the first time to the best of our knowledge, we show that it is feasible to efficiently generate narrow-linewidth THz waves based on transition radition when a nonrelativistic electron beam moves through multilayers.
 
QThD56 10:30 - 12:00
Model Studies of Photorefractive Keratectomy: Laser Photolysis of Selected Dipeptides, M Mulcahy, D. N. Nikogosyan, University College Cork, Cork, IRELAND, John McInerney, National University of Ireland, Cork, IRELAND, H. Gorner, Max-Planck Institute f. Strahlenchemie, Muelheim an der Ruhr, GERMANY
The quantum yields of photodecomposition and peptide bond scission were determined for a number of aromatic and aliphatic dipeptides under 193 nm laser irradiation in neutral Ar-saturated aqueous solution. No dependence of photodecomposition quantum yield on sequence of amino acid residues was found.
 
QThD57 10:30 - 12:00
Triplet Formation via Ultrafast Intersystem Crossing in Thiophene Oligomers Detected by Time Resolved Transient Spectra, Wolfgang Paa, Sabine Rentsch, Friedrich-Schiller-Universitaet, Jena, GERMANY
Investigating transient spectra of bithiophene and terthiophene we detected ultrafast intersystem crossing (ISC) proceeding in less than 2 ps. The role of an excited twisted conformation for ultrafast ISC and resulting high triplet yields will be discussed.
 
 
QThD58 10:30 - 12:00
157, 193 and 248 nm Structural Damage of the DNA and RNA Bases, A.C. Cefalas, E. Sarantopoulou, National Hellenic Research Foundation, Athens, GREECE
We report on the structural damage of the RNA and DNA bases thymine, cytosine adenine and guanine at 157,193 and 248 nm using mass spectrocopy. Even at low laser energy, there was a complete breaking of the chemical bonds.
 
QThD59 10:30 - 12:00
Nonlinear Circular Dichroism in a Liquid of Chiral Molecules, H. Mesnil, M. Schanne-Klein, Francois Hache, Ecole Polytechnique, Palaiseau, FRANCE
Signature of the optical activity in the third order optical response of a liquid of chiral molecules investigated. Theoretical claculations as well as an experimental demonstration of nonlinear circular dichroism are given.
 
QThD60 10:30 - 12:00
Two-Dimensional Two-Photon Laser Induced Fluorescence Imaging of Atomic Hydrogen in Low Pressure Chemical Vapor Deposition, Jussi Larjo, H Koivikko, D Li, R Hernberg, Tampere University of Technology, Tampere, FINLAND
Two photon laser induced fluorescence imaging of atomic hydrogen density in the reactive zone of a hot filament chemical vapor deposition reactor is presented. The image area was 10x0.5cm with 0.2 mm resolution.
 
QThD61 10:30 - 12:00
Excited-state Intramolecular Proton Transfer in 4'-amino Derivatives of 3-hydroxyflavone in Organic Solvents and Biomembranes, Julia Kruchenok, , N. Nemkovich, A. Sobchuk, E. Petrov, A.N. Rubinov, National Academy of Sciences of Belarus, Minsk, BELARUS, V. Pivovarenko, National Taras Shevchenko Univ, Kiev, UKRAINE
Results of steady-state and time-resolved fluorescence investigations of 4'-diethylamino and 4' -(15-azacrown-5) derivatives of 3-hydroxyflavone in aprotic solvents and human erythrocyte membranes are presented. A mechanism of the charge and proton transfer in 4'-amino-3-hydroxyflavones is proposed.
 
 
QThD62 10:30 - 12:00
High Resolution 5th Overtone of Benezene by Cavity Ringdown Spectroscopy, N Ohgata, K Sinmura, S Nishio, A Matsuzaki, H. Sato, Mi'e University, Tsu, JAPAN
High resolution spectrum of the fifth overtone (6 CH) benzene (C6H6) in the gas phase was probed by cavity ringdown spectroscopy, using pulsed dye laser in the 16500 cm-1 region.
 
QThD63 10:30 - 12:00
Modeling of Blood Vessels Heated by Laser Radiation, L.G. Astafieva, G.I. Zheltov, National Academy of Sciences of Belarus, Minsk, BELARUS
A new model of blood vessel heating by laser radiation is proposed. Blood vessel is modeled by infinite circular cylinder situated in skin dermis. Heat conduction equation is calculated taking into account inhomogeneous internal source function.
 
Room: Rhodes
10:30 - 12:00
Session: IQEC Poster Session
 
QThD64 10:30 - 12:00
Collapse of Two-Atom Vacuum Rabi Oscillation in a Planar Microcavity, Kikuo Ujihara, University of Electro-Communications, Chofu, Tokyo, JAPAN
Vacuum Rabi oscillation in a planar microcavity by two initially excited atoms is numerically shown to be suppressed below the single-atom oscillation level when the interatomic separation is nearly equal to the cavity transverse coherence length.
 
 
QThD65 10:30 - 12:00
Quantum-Classical Correspondence in Dissipative Optical Systems with Limit Cycle, Kirill Alekseev, Kirensky Institute of Physics, Krasnoyarsk, RUSSIA, Jan Perina, Palacky University, Olomouc, CZECH REPUBLIC
We compare the quantum and classical dynamics of self-pulsing optical systems in the limit of large number of photons N. We show that a classical description is valid during a time interval which is proportional to N.
 
 
QThD66 10:30 - 12:00
Three-Photon Parametric Oscillator: Semiclassical and Quantum Signatures, G. Yu. Kryuchkyan, L. A. Manukyan, N. T. Muradyan, National Academy of Sciences, Ashtarak-2, ARMENIA
We present a scheme of three-photon parametric oscillator involving cascaded second-order nonlinearities. The advantage is the low value of the threshold power. We study the Wigner functions, von Neumann entropies and photon statistics of three-photon light.
 
QThD67 10:30 - 12:00
A Scheme for the Robust Generation and Detection of Nonclassical States, Giacomo Mauro D'Ariano, Dipartimento di Fisica A.Volta, Pavia, ITALY, Matteo G. A. Paris, Universita di Pavia, Pavia, ITALY
We suggest a novel conditional scheme involving a parametric amplifier and an avalanche photodetector to generate highly nonclassical states of the radition field. The nonclassicality is robust against the amplifier gain and the detector efficiency.
 
QThD68 10:30 - 12:00
Transmitted and Fluorescent Spectra of a Two-Level Atom in an Optical Parametric Oscillator, P. R. Rice, J. P. Clemens, P. K. Rungta, R Thurairutnam, Robert Brecha, University of Dayton, Dayton, OH, USA
The spectrum of two level atom in an optical parametric oscillator is calculated in the weak-field limit. Novel and interesting spectral features are compared with those found in other cavity QED systems.
 
QThD69 10:30 - 12:00
First-Order Interference of Nonclassical Light Emitted Spontaneously at Different Times, Yoon-Ho Kim, Maria Chekova, Sergei Kulik, Yanhua Shih, Morton Rubin, University of Maryland, Baltimore, MD, USA
First order interference in spontaneous parametric down conversion generated by two temporally separated pump pulses is studied. Interference occurs in the signal channel only when it is inherently impossible to tell from which pulse the signal photon orginated. This leads to the interesting nonclassical feature that the condition for the signal photon interference depends on the parameters of the pump pulse and the idler photon.
 
 
QThD70 10:30 - 12:00
Controlled Single-Photon Emission From a Strongly Coupled Atom-Cavity System, Axel Kuhn, T Legero, Gerhard Rempe, M. Hennrich, Max-Planck-Institute für Quantenoptik, Garching bei Muenchen, GERMANY
A method is proposed for the single-photon emission into a predetermined mode of the electromagnetic radition field, triggered by a light pulse. This photon is emitted by an atom strongly coupled to a highf-finesse cavity.
 
 
QThD71 10:30 - 12:00
Spontaneous Emission in Nanoscopic Dielectric Media, H. Schniepp, H-M. Ludwig, T. Kalkbrenner, Vahid Sandoghdar, Universitaet Konstanz, Konstanz, GERMANY
We have compared the spontaneous emission rate in bulk versus a nanoscopic dielectric medium. To do this we have measured the fluorescence lifetime of europium ions in individual polymer spheres
with diameters of 20 nm to 2000 nm.
 
QThD72 10:30 - 12:00
Coupling of a Near-Field Probe to a Whispering Gallery Modes in a Microsphere, Oliver Benson, Y. S. Goetzinger, Vahid Sandoghdar, Universitaet Konstanz, Konstanz, GERMANY
We study experimentally the influence of a sharpened optical fiber tip on the high-Q modes of a microsphere resonator. New experiments where we couple optically active nanoparticles to individual cavity modes are discussed.
 
 
QThD73 10:30 - 12:00
Error-free Discrimination Between Two Non-orthogonal States, Roger Clarke, Erling Riis, Stephen Barnett, John Jeffers, University of Strathclyde, Glasgow, Scotland, UK, A. Chefles, University of Herfordshire, Hatfield, UK
The Ivanovic-Dieks-Peres measurement discriminates between two non-orthogonal states with certainty, but sometimes produces an inconclusive result. We use a free-space interferometer to experimentally distinguish between two non-orthogonal polarisation states of light.
 
QThD74 10:30 - 12:00
A Dynamics and Quasi-Stationary States of a N-Atom Micromaser., G. P. Miroshnichenko, St. Petersburg State Institute, St. Petersburg, RUSSIA, Andrei Rybin, J. T. Timonen, University of Jyvaeskylae, Jyvaeskylae, FINLAND, I. P. Vadeiko, University of Jyvaeskylae, St Petersburg, RUSSIA
A N-atom model of micromaser exhibits a set of new properties as compared with the one atom model. In our work we concentrate in particular on powerful cavity cooling, two-sided trapping of the field by Dicke's atoms, and some other properties.
 
QThD75 10:30 - 12:00
Comparison of the Capacities of Communication Channels with Different Statitics of Information Carriers, Mikhail Khodasevich, George Sinitsyn, A. Yasukevich, National Academy of Sciences of Belarus, Minsk, BELARUS
We account the influence of non-additivity of signal and noise in the number-state model of fermionic communication channel. It allows to compare the limiting characteristics of channels with different statistics of carriers.
 
 
QThD76 10:30 - 12:00
Atomic Inversion After a Photon Detection, V. Shatokhin, Sergei Kilin, National Academy of Sciences of Belarus, Minsk, BELARUS
We predict the effect of atomic inversion of the reduced atomic state following detection of the filtered photon. Role of quantum interference is discussed, and the way of this effect observation is proposed.
 
 
QThD77 10:30 - 12:00
Manipulation of the Intermode Quantum Correlations of Optical Pulses in Nonlinear Fibers via a Classical Pulse Shaping, M. Takeoka, S. Sakata, Fumihiko Kannari, Keio University, Yokohama, Kanagawa, JAPAN
We numerically studied the dependence of the initial optical pulse shape on the spectral filtering photon-number squeezing in nonlinear optical fibers. Fourier domain pulse shaping technique can be effectively applied to optimize the squeezing.
 
 
QThD78 10:30 - 12:00
Eigen-Frequencies in Giant Dipole-Dipole Interaction Mediated by Whispering Gallery Modes of Microspheres, S. Dutta Gupta, University of Hyderabad, Hyderabad, INDIA, Girish Agarwal, Physical Research Laboratory, Ahmedabad, INDIA
Eigenmodes of a two-dipole microsphere system are studied. Qualitative differences are predicted for large and small sphere because of nonresonant contributions. Giant dipole-dipole interaction is shown for large sphere,which support modes with extraordinarily large Q values.
 
 
QThD79 10:30 - 12:00
Coherent Control of Birefringence, Anil Patnaik, Girish Agarwal, Physical Research Laboratory, Ahmedabad, INDIA
We consider the possibility of controlling magneto-optical rotation using a coherent field. We demonstrate very significant amount of magneto-optical rotations in certain frequency regions which depends on the parameters of the control field.
 
 
QThD80 10:30 - 12:00
Quantum Coding on Phase Plane, Sergei Kilin, D. Mogilcvtscv, V. Shatokhin, National Academy of Sciences of Belarus, Minsk, BELARUS
In our work we present a quantum coding procedure which implements phase space of a harmonic oscillator. We discuss quantum coding in sequences of coherent states, possibilities of information compression and error-correction for both the simple binary code and the alphabet formed by the set of imperfectly distinguishable coherent states on the lattice in the phase plane.
 
 
QThD81 10:30 - 12:00
Complimentary and Intelligent State Simultaneous Measurements, Alexei Trifonov, Russian Academy of Sciences, St. Petersburg, RUSSIA, Gunnar Bjoerk, J. Soederholm, Royal Institute of Technology, Kista, SWEDEN
In order to make a simultaneous measurement, i.e. obtain (partial) information about both of the complementary observables from each system in an ensemble, the state must be entangled with an ancillary system. We have made simultaneous measurements on polarization entangled photons for which we can vary both the degree of entanglement and optimize the measurement projection bases for the ancilla.
 
QThD82 10:30 - 12:00
Real-Time Detection of Single Atoms with Transverse Mode of High-Finesse Optical Micro Cavity, Noritsuga Shiokawa, Yukiko Shimizu, Noriaki Yamamoto, Tatsuo Noguchi, University of Tokyo, Tokyo, JAPAN, Mikio Kozuma, Takahiro Kuga, University of Tokyo, JAPAN
A novel type of single-atom trapping using a high-order transverse mode of high-finesse optical micro cavity is proposed. We also demonstrated the real-time detection of single atoms with this transverse mode.
 
 
QThD83 10:30 - 12:00
Three-Photon Creation in x(3) Mediated Parametric Down-conversion, John Rarity, Defense Evaluation & Research Agency, Malvern, Worcestershire, UK
We calculate the rate of creation of three-photon events in spontaneous parametric processes. For materials with high third order susceptibility and suitable birefringence a projected three-photon rate of order one per second can be expected.
 
 
QThD84 10:30 - 12:00
Evolution of an Atom Impeded by Measurement, Christoph Balzer, T. Hannemann, Christoph Wunderlich, W. Neuhausser, P. Toshek, Universitaet Hamburg, Hamburg, GERMANY
The Quantum Zeno Effect predicts the evolution of a quantum system to be impeded under observation. In an ensemble that effect is indistinguishable from dephasing the systems wavefunction. We present measurements on a coherently driven optical E2 line of a single trapped ion.
 
QThD85 10:30 - 12:00
Quantum Spin Flip Model for a Vertical-Cavity Surface-Emitting Lasers, Jean-Pierre Hermier, Isabelle Maurin, A. Bramati, Universite P. et M. Curie, Paris, FRANCE, Antonio Khoury, Universidade Federal de Pernambuco, Recife, PE, BRAZIL, Elisabeth Giacobino, Universite P. et M. Curie, Paris , FRANCE
We present a full quantum model designed to investigate the intensity noise properities of a vertical-cavity surface-emitting lasers. The anticorrelations are found to play an important role in this regime.
 
QThD86 10:30 - 12:00
Nonclassicality and Fidelity for Quantum Teleportation of Continuous-VariableStates, Myung Shik Kim, Queens University Of Belfast, Belfast, UK, Jinhyoung Lee, Sogang University, Seoul, KOREA
We consider teleporation of nonclassical features in an original unknown state when the quantum channel is subject to the thermal environment. We investigate the efficiency of the quantum teleportation.
 
 
QThD87 10:30 - 12:00
Atom Symmetry Breaking and Level Coupling in Atom-Surface van der Waals Interaction, M. Boustimi, B. Viaris, J. Baudon, J. Robert, Martial Ducloy, Universite Paris-Nord, Villentaneuse, FRANCE
Atom-surface interractions in cavity QED present an anisotropic component due to cylindrical symmetry . Near-field atom symmetry breaking iis responsible for 3p0-3p2 argon level mixing, which is observed on the diffraction of a metastable Ar beam crossing a copper micro-slit.
 
QThD88 10:30 - 12:00
Radiating Dipoles in Photonic Crystals, Barry Sanders, Macquarie University, Sydney, NSW, AUSTRALIA, Kurt Busch, Universitaet Karlsruhe, Karlsruhe, GERMANY, Nipun Vats, Sajeev John, University of Toronto, Toronto, ON, CANADA
By modelling the radiative dynamics of a dipole oscillator coupled to Bloch modes of the photonic crystal as coupled oscillators,we reproduce known photonic crystal results and propose new microwave and optical experiments.
 
QThD89 10:30 - 12:00
Monte Carlo Simulation of Resonance Fluorescence Under Non-Poissonian Excitation, Daniel Felinto, Antonio Khoury, Sandra Vianna, Universidade Federal de Pernambuco, Pernambuco, BRAZIL
We consider simulations with variable statistics for the energy exchange between atoms and excitations laser, and show that it is possible to control the fluorescence statistics if we control the statistics of the stimulated events.
 
 
QThD90 10:30 - 12:00
Limits of the Photon Model in Cavity QED & Quantum Optics, B. Dalton, S. Brown, University of Queensland, Brisbane, Queensland, AUSTRALIA
The photon model of the quantum electromagnetic field has recently been developed further and applied in Cavity QED and Quantum Optics. Coupled and uncoupled field oscillators cases both occur. Possiblle limits to the model are discussed.
 
 
QThD91 10:30 - 12:00
Far Field Radiation Pattern From Quantum Boxes Located in Micropillars, Herve Rigneault, ENSPM, Marseille, FRANCE, J. Broudic, Domaine Universitaire de St Jerome, Marseille, FRANCE, Bruno Gayral, France Telecom-CNET, Bagneux, FRANCE, Jean-Michel Gerard, CNET, Bagneux, FRANCE
Far field radiation pattern from InAs quantum boxes located in semiconductor (GaAs/AlAs) pillar microcavities is studied at room temperature. We study the angular emission of the various discrete modes for different pillar diameters.
 
 
QThD92 10:30 - 12:00
Biphotons Generated from a Multimode Pump: Revival of a Interference, O. Karabutova, A. Burlakov, Maria Chekhova, S.P. Kulik, G. Rytikov, Moscow State University, Moscow, RUSSIA
For degenerate collinear biphotons generated from a multimode pump, interference is observed. It disappears as the interferometer path difference exceeds the pump coherence length but reappears at path difference multiple to the doubled laser-cavity length.
 
QThD93 10:30 - 12:00
Non-holonomic Quantum Devices, V.M. Akulin, CNRS, Orsay , FRANCE, V. Gershkovich, Institut des Hautes Etudes Scientifiques, Bures - sur - Yvette, FRANCE, G. Harel, Vrije Universiteit, Amsterdam, THE NETHERLANDS
We show that quantum devices based on non-holonomic control can be employed efficiently for quantum computing and quantum simulation. We describe a device that can perform Toffoli-gate transformations and discrete Fourier transform on 9 qubits.
 
 
QThD94 10:30 - 12:00
Hexagonal Pattern Correlations in a Kerr Cavity, Damia Gomila, Pere Colet, Universidad de las Islas Baleares, Palma de Mallorca, SPAIN
We study the fluctuations and correlations in an hexagonal pattern in a Kerr cavity.. Correlations between intensity fluctuations of the fundamental harmonics can be understood in terms of momentum conservation.
 
QThD95 10:30 - 12:00
Microscopic Model of Quantum Noise in Semiconductor Lasers, Martino Travagnin, Luigi Lugiato, Universita di Milano, Milano, ITALY
We analyze the zero-frequency intensity noise of semiconductor lasers by taking into account the spectral carrier distributions. We show that pump-blocking may limit intensity squeezing, while scattering and spectral hole burning can be neglected.
 
 
QThD96 10:30 - 12:00
Multi-Term Two - Photon Entanglement, Kaoru Sanaka, Takahiro Kuga,University of Tokyo, Tokyo, JAPAN
We propose the multi-term entangled state with photon pairs. The state is a simple extension of usual 1/2-spin entangled state and its physical meaning is that two particle occupy the same m-th spin state simultaneously. Experimental study by measuring the intensity correlation is in progress.
 
QThD97 10:30 - 12:00
A Free-Space Test Range for Global Quantum Key Distribution Feasibility Studies, Paul Edwards, W.N. Cheung, L.O. Barbopoulos, University of Canberra, Canberra, ACT, AUSTRALIA, B. Greene, Electro Optic Systems Pty Limited, Queanbeyan, NSW, AUSTRALIA, J. Luck, Australian Surveying & Land Info Group, Canberra, ACT, AUSTRALIA
We describe the instrumentation and use of an optical free-space test range for global quantum key distribution system investigations. The range is based on a satellite laser ranging station incorporating a 750 mm Coude telescope.
 
 
QThD98 10:30 - 12:00
Biexcitonic Contribution to Four-Wave Mixing in a Self-Organized Quantum-Well Material, Junko Ishi, Y. Kato, Sophia University, Chiyoda-ku, Tokyo, JAPAN, Hideyuki Kunugita, Kazuhiro Ema, CREST, Takuma Ban, University of Tokyo, Tokyo, JAPAN, T. Kondo, Sophia University, Chiyoda-ku, JAPAN
We investigate polarization dependence of degenerate and nondegenerate four-wave-mixing signal in a self-organized quantum-well material (C6H13NH3)2PbI4. We can clearly observe the signals attributed to biexciton and estimate the biexcitonic contribution to the optical nonlinearity quantitatively.
 
QThD99 10:30 - 12:00
Picosecond Time - Resolved Photoluminescence Miscroscopy of Short Period Impurity Free Vacancy Disordered ALGaAs Gratings, Jason Smith, Gerald Buller, Heriot-Watt University, Edinburgh, UK, A. Saher Helmy, Ann Catrina Bryce, John Marsh, University of Glasgow, Glasgow, Scotland, UK
Time-resolved Photoluminescence of gratings with periods as short as 4µm, formed by spatially selective Impurity Free Vacancy Disordering of GaAs/AlGaAs quantum wells, shows suppression of recombination lifetime modulation, caused by differential strain during annealing.
 
 
QThD100 10:30 - 12:00
Coherent Coupling in Homogeneously Broadened Exciton Ensembles, Eckhard Finger, S. Kraft, Fachbereich Physik, Marburg, GERMANY, A. Euteneuer, M. Hofmann, W. Stolz, Torsten Meier, P. Thomas, Stephan Koch, W. Ruehle, Philipps University, Marburg, GERMANY
We investigate inhomogeneously broadened exciton ensembles in semiconductor heterostructures with coherent excitation spectroscopy. Our results reveal coherent coupling and energy splittings in quantum-well samples with different disorder strengths.
 
QThD101 10:30 - 12:00
Anisotropy of Optical Transition in Direct Bandgap AIII-BV Bulk Semiconductor, D. L. Boiko, Pascal Besnard, G. M. Stephan, ENSSAT, Lannion, FRANCE
The exact solutions of the Luttinger effective mass hamiltonian for heavy holes and light holes of valence band and electrons of conductance band is used to calculate the elements of the optical transisiton matrix in zinc-blend semiconductor. The band mixing was shown to exist in the general point of the Brillouin zone and the transitions CÆhh Ø and CØÆhh Are shown to be allowed. Moreover the nonuniform distribution of the carriers over the constant energy surfaces in the kÆ space is shown to be responsible for the anisotropy of the linear gain.
 
 
QThD102 10:30 - 12:00
Monte-Carlo Simulation of Photocarrier Dynamics; THz-pulse and Second-Harmonic Generation from Semiconductor Surface, V.L. Malevich, National Academy of Sciences of Belarus, Minsk, BELARUS
Space-charge electric field dynamics and photocarrier transport at n-GaAs surface excited by an ultrashort laser pulse have been investigated on a subpicosecond time scale by using Monte-Carlo simulation. The developed method has been applied to analysis of THz-pulse and second harmonic generation from a semiconductor surface depletion layer.
 
 
QThD103 10:30 - 12:00
Self-Organization and Pulsing in Multiple Quantum Well Structures Excited by Infrared Radiation, M. Ryzhii, Victor Ryzhii, University of Aizu, Fukushima, JAPAN, Robert Suris, Ioffe Institute of Technology, St. Petersburg, RUSSIA, C. Hamaguchi, Osaka University, Osaka, JAPAN
Nonequilibrium phenomena in multiple quantum well structures excited by infrared radition are studied using an ensemble Monte Carlo particle modeling. It is shown that side by side with the formation of periodic electric-field domains the pulsations of electric field and photocurrent can occur.
 
QThD104 10:30 - 12:00
Under-Threshold Mechanism of Generation of Frenkel Defects by Laser Radiation, Artur Medvid', Riga Technical University, Riga, LATVIA, Y. Hatanaka, Shizuoka University, Hamamatsu, JAPAN, J. Barloti, Riga Technical University, LATVIA
We propose a new mechanism for generation and separation of Frenkel defects in a semiconductor by thermal gradient field arising as a result of strong light absorption. The electrostatic under-threshold mechanism is shown not to work at irradiation of a semiconductor by light.
 
 
QThD105 10:30 - 12:00
Semiconductor Bloch Equations for Quantum Wells with Dynamical Screening, Mauro Pereira, Instituto de Fisica, Salvador BA, BRAZIL, G. Manzke, T. Klaehn, K. Henneberger, Fachbereich Physik, Rostock, GERMANY
The interplay of many-body, quatum confinement and band structure effects and the relative relevance of dynamical contrasted with static screening are discussed through the numerical solution of generalized Semiconductor Bloch Equations for hereostructures.
 
QThD106 10:30 - 12:00
Modulation of Optical Absorption by Controlling the Sign of Quantum Interference Via Parallel-Perpendicular Kinetic Energy Coupling Effects, Kyoung-Youm Kim, Byoungho Lee, Seoul National University, Seoul, KOREA
We propose a scheme of modulating optical absorption in an asymmetric coupled quantum well (QW) structure via the parallel-perpendicular energy coupling effect. A specific QW structure is suggested and the feasibility of our scheme is proved with the calculation of wavefunctions and absorption coefficients.
 
 
QThD107 10:30 - 12:00
Transverse Cumulatvie Effects in Pulsed Laser Irradiation of Nematic Liquid Crystals: 2-10-Hz Pulse-Repetition Rate, Nanosecond Mode, Svetlana Lukishova, IRE-SL, Honeoye Falls, NY, USA, Ansgar Schmid, University of Rochester, NY, USA
In an irradiation geometry excluding orientational effects, the nonlinear optical response of layers of pure 5CB liquid cyrstal exhibit a pulse-repetition-rate dependence involving a slow-build-up time, stable, elliptical ring pattern. Analysis of the effect in terms of two-photon absorption and transient heat-diffusion calculations is presented.
 
 
 
QThD108 10:30 - 12:00
Observation of Light-induced Inhomogeneous Broadening in Polyaniline Solutions, Leonardo Menezes, Cid B. de Araujo, Universidade Federal de Pernambuco, Recife, BRAZIL, Falcão, W.M. de Azevedo, Universidade Federal de Pernambuco, Recife, Brazil
Self-diffraction with broadband lasers was performed in polyaniline solutions. An intensity-dependent inhomogeneous broadening of the S0-S1 transition was observed. Non-equilibrium distribution of population in the vibrational states originates the inhomogeneity.
 
 
QThD109 10:30 - 12:00
Photoluminescence Dynamics in Polythiophene Derivative, Takashi Kobayashi, Junichi Hamazaki, Mitsuyoshi Arakawa, Sophia University, Chiyoda, Tokyo, JAPAN, Hideyuki Kunugita, Kazuhiro Ema, CREST, Keiko Ochiai, Sophia University, Chiyoda, Tokyo, JAPAN, Masahiro Rikukawa, Kohei Sanui, CREST, JAPAN
We measured time-resolved photoluminescence on highly ordered and disorder films of polythiophene derivative, poly(3-[2-((S)-2-menthylbutoxy)ethy1]thiophene). A red shift of luminescene peaks and a time delay of luminescene rising at lower energy remarkably appeared in disorder film.
 
 
QThD110 10:30 - 12:00
Dynamic Disordering Effects in Diferential Absorption Spectra of: Excess Energy Degradation vs. Bath-Assisted Relaxation, Eugenijus Gaizauskas, Vilnius University, Vilnius, LITHUANIA, K.-H. Feller, Fachhochschule Jena, Jena,
Dynamic disordering effects in molecular aggregates were examined theoretically by considering two possible pathways of energy degradation processes after exciton-exciton annihilation event. It was shown, that different pathways maps onto specific DAS transmission spectra.
 
 
QThD111 10:30 - 12:00
Chromium-doped Silica-based Optical Fibres: Influence of the Chemical Composition on Oxidatin States and Optical Properties, Bernard Dussardier, V. Felice, G. Monnom, Daniel Ostrowsky, Universite de Nice, Nice, FRANCE
The oxidation states and optical properties of chromium ions doped into silica-based optical fibers are higly sensitive to the core chemical compostition. Small concentrations (~1-2 mol%) of germanium and aluminium stabilize Cr3+ or Cr4+, respectively.
 
 
QThD112 10:30 - 12:00
Optical Studies of Thin Film Photonic Crystals, Sergei Romanov, Thorsten Maka, Dmitry Chigrin, Clivia Sotomayor-Torres, Manfred Mueller, Rudolf Zentel, University of Wuppertal, Wuppertal, GERMANY
We have prepared thin film opal-like photonic crystal from PMMA beads and inverted replicas using a SnS2 Infill. Experimental observations of the modification of the dispersion propertiesare discussed and compared to a theoretical model.
 
 
QThD113 10:30 - 12:00
Laser Action in 2D Random Media, O. Legrand, F. Mortessagne, P. Sebbah, C. Vanneste, Universite de Nice, Nice, FRANCE
We simulate laser action in nonlinear highly scattering media where Anderson localization takes place. We demonstrate how different localized modes which act as laser resonators are selected, depending on the gain location.
 
QThD114 10:30 - 12:00
Mechanisms for Three-Centre Energy Pooling in Lanthanide Doped Crystals, Robert Jenkins, David Andrews, University of East Anglia, Norwich, UK
A study based on molecular quantum electrodynamics reveals that both cooperative and accretive mechanisms for three-centre energy pooling are explicity manifest in the context of up-conversion in lanthanide doped crystal lattices.
 
QThD115 10:30 - 12:00
Optimization of Laser Energy Coupling to Solid Targets, G. Ts. Nersisyan, V. O. Papanyan, National Academy of Sciences, Ashtarek-2, ARMENIA, Frank Tittel, Rice University, Houston, TX
Enhanced XUV emission is observed from laser plasmas formed by metal targets that are coated by fullerene or phthalocyanine layers. A simple model is proposed and tested for selection of a suitable coating material for effective coupling of laser radiation to a solid target.
 
 
QThD116 10:30 - 12:00
Upconversion Emission Enhancement Induced by Themal Effects in Infrared Excited Pr3+/Yb3+ -Codoped Ga2O3:La2S3 Chalcogenide Glasses, P. V. Dos Santos, E.A. Gouveia, A.S. Gouveia-Neto, M.T. de Araujo, UFAL, Alagoas, BRAZIL
Upconversion emission enhancement induced by thermal effects in nonresonant infrared excited Pr3+ -doped Yb3+ sensitized Ga2O3:La2S3 chalcogenide glasses is reported. The upconversion emission enhancement is attributed to the multiphonon-assisted
anti-Stokes excitation of the ytterbium ions.
 
 
QThD117 10:30 - 12:00
Controlled Optical Transition Rates in Nanodroplets, Serdar Oezcelik, Bilkent University, Bilkent, Ankara, TURKEY
We are able to control optical transition rates utilising reverse micellar structures (nanodroplets) and show that they would be a candidate as molecular tools to prepare light emitting materials having controlled optical properties.
 
 
QThD118 10:30 - 12:00
Superfocusing of Plasmon Polariton on Rough Surface of Metal: Theory and Experiment, Kh.V. Nerkararyan, Asatur Lalayan, Yerevan State University, Yerevan, ARMENIA
The possibility of anomatous increase of the surface plasmon polariton wave fields in contact points of two-conical silver structure is theoretically and experimental studied. Surface photodamage stipulated by superfocusing of plasmon polariton in described structure at laser irradiation were observed.
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