Del Mar Photonics - Del Mar Photonics at Optics and Photonics 2008 - Pump-probe - Multiphoton

Femtosecond laser processing with adaptive optics (Paper Presentation)
Paper 7042-17 of Conference 7042
Authors(s): K.-C. Cho, Shean-Jen Chen, National Cheng Kung Univ. (Taiwan)
Date: Sunday, 10 August 2008
In order to accomplish a fast and accurate processing, a two-axis beam scanner, a acousto-optic modulator (AOM), and an adaptive optics system (AOS) controlled by a digital signal processor (DSP) are integrated into a femtosecond laser processing system. The laser system utilizes CAD software to design the processing route and exports a drawing interchange format (DXF) file. Then, the DSP with the related processing information from the DXF file and send command signals to the beam scanner and the AOM. In order to achieve the diffraction-limit laser processing spot, the AOS with a 37-element deformable mirror will adjust the laser wavefront based on off-line wavefront detection to reduce the aberrations from the laser system or processed samples.

A nanometer-sized few femtosecond electron source at high-repetition rates (Paper Presentation)
Paper 7032-12 of Conference 7032
Authors(s): Christoph Lienau, Carl von Ossietzky Univ. Oldenburg (Germany)
Date: Sunday, 10 August 2008
We describe and demonstrate a novel approach towards realizing a nanometer-sized ultrafast electron source. By illuminating ultrasharp gold tips with 7-fs pulses from an 80 MHz Ti:sapphire oscillator, we induce emission of an intense flux of up to 10 Million electrons per second. Due to the local field enhancement this emission is strongly localized at the apex of the metallic tip with a radius of curvature of only few tens of nanometers. We demonstrate the multiphoton character of the electron generation in the absence of a tip bias voltage. The results of first imaging experiments using this novel electron source will be presented, demonstrating near-field imaging of local electric fields with about 20 nm spatial resolution.

Femtosecond coherent control of surface plasmon propagating direction (Paper Presentation)
Paper 7032-13 of Conference 7032
Authors(s): SooBong Choi, Doo-Jae Park, YeoChan Yoon, Seoul National Univ. (South Korea); JiHoon Kang, Q-Han Park, Korea Univ. (South Korea); D. S. Kim, Seoul National Univ. (South Korea)
Date: Sunday, 10 August 2008
We experimentally demonstrate that it is possible to control surface plasmon polaritons (SPP) propagation direction from a nano-slit launcher, using femtosecond coherent-control. In the investigated one-dimensional nano-optical system, the flow of electromagnetic energy is controlled at the desired direction defined by the in-plane wavevector of the interfering SPP fields. In the present case, the temporal-phase dependent optical nearfield distribution is governed by the spectrally selective coupling to SPP modes at grooves.

Femtosecond modulation of surface plasmon-polariton propagation (Paper Presentation)
Paper 7032-14 of Conference 7032
Authors(s): Kevin F. MacDonald, Zsolt Samson, Nikolay I. Zheludev, Univ. of Southampton (United Kingdom); Mark I. Stockman, Georgia State Univ.
Date: Sunday, 10 August 2008
We report on a new way of controlling the propagation of surface plasmon polariton waves on a metal/dielectric interface using femtosecond optical pulses.

Control of surface plasmons with phase-correlated femtosecond light fields (Paper Presentation)
Paper 7032-15 of Conference 7032
Authors(s): Atsushi Kubo, Univ. of Tsukuba (Japan); Hrvoje Petek, Univ. of Pittsburgh
Date: Sunday, 10 August 2008
Optical control of surface plasmon (SP) fields and its time-resolved microscopic imaging are demonstrated by means of phase-correlated 10fs laser pulse pair excitation of two photon photoemission combined with photoemission electron microscopy. Excitation pump-probe light pulses, with mutual delay controlled to better than 50as accuracy, couple to SPs at nano-scale optical patterns fabricated in deposited silver films. Evolution of the SP fields is imaged thorough a polarization grating created by interference with the external excitation light field. Simulation based on the complex SP wave vector and Huygens' principle explains the experimental results.

Formation of femtosecond bessel and conical light beams by single and double axicons (Paper Presentation)
Paper 7062-2 of Conference 7062
Authors(s): Svetlana N. Kurilkina, Vladimir N. Belyi, Nikolai S. Kazak, Anatolii A. Ryzhevich, B.I. Stepanov Institute of Physics (Belarus)
Date: Monday, 11 August 2008
The properties of the transformation of a pulse beam to femtosecond Bessel light beam (FBLB) using axicons are investigated theoretically and experimentally. The dependence of group velocity of FBLB on dispersion of the axicon material and its base angle is established. The appearance of super-short satellite pulse with envelope maximum depending on incident pulse duration is predicted and correctly explained. New techniques for controlling the spatial form of FBLB, based on including additional lenses and tunable-diameter diaphragm are developed and experimentally tested. A new method of forming the super-short pulsed beams of Bessel type using double-axicon is proposed and elaborated.

Femtosecond laser pulse filament robustness in aerosol layer (Paper Presentation)
Paper 7090-12 of Conference 7090
Authors(s): Elena P. Silaeva, M.V. Lomonosov Moscow State Univ. (Russia)
Date: Tuesday, 12 August 2008
The robustness and recoverability of the high-power femtosecond laser pulse filament in the presence of atmospheric aerosol scattering layer was studied by means of computer simulations.
The obtained 3D-distributions of fluence and electron density in a laser filament demonstrate that these parameters acquire a stochastic character inside the aerosol layer and recover on leaving it.
Filament energy decreases with distance inside the layer because of the water particles scattering and after the layer because of the amplitude-phase distortions induced by aerosol particles. The equivalence of nonlinear aerosol medium and linear damping medium with equal to dispersive dissipations was investigated.

Modelling of femtosecond pulse propagation through dense scattering media (Paper Presentation)
Paper 7065-31 of Conference 7065
Authors(s): Nicolas Rivi鑢e, Barthelemy Marie, Laurent Hespel, Thibault Dartigalongue, ONERA (France)
Date: Tuesday, 12 August 2008
We study the interaction of femtosecond polarized light pulse with a scattering medium considering Monte-Carlo simulation. The Monte Carlo scheme is based on temporal photon pursuing, including a pseudo MC approximation associated to two small detectors in forward and backward directions. The statistical scattering properties are derived from temporal Mueller matrices, that are evaluated through a scanning of frequency associated to the Lorenz-Mie theory.
We specially focused our attention on solid rocket motor modelling. In such scattering medium, large optical thickness, various bimodal particle size distributions and concentration gradients could be observed.

Surface profile measurement of silicon wafers using a femtosecond pulse laser (Paper Presentation)
Paper 7063-35 of Conference 7063
Authors(s): Taekmin Kwon, Ki-Nam Joo, Seung-Woo Kim, Korea Advanced Institute of Science and Technology (South Korea)
Date: Tuesday, 12 August 2008
We investigated the possibility of exploiting a femtosecond pulse laser as the light source for the low-coherence interferometer designed for inspection of silicon wafers. The intension is to measure both the front and rear surface profiles of a bare silicon wafer simultaneously as the femtosecond laser provides a near-infrared spectrum transparent to silicon. The spectrum is further widened using a photonic crystal fiber to cover the wavelength range of 1000 to 1100 nm, which is not only transmittable through silicon but also detectable by an ordinary CCD photodetector array.

PbTe quantum dots multilayer grown by femtosecond laser ablation (Paper Presentation)
Paper 7056-9 of Conference 7056
Authors(s): Eugenio Rodriguez, Lourdes Moya, Ricardo S. Moreira, Walfrido A. Pippo, Carlos L. Cesar, Luiz C. Barbosa, Univ. Estadual de Campinas (Brazil)
Date: Wednesday, 13 August 2008
In the present work, PbTe quantum dots embedded in a dielectric host (SiO2) were fabricated. The samples were fabricated by alternating between the laser ablation technique and the Plasma Enhanced Chemical Vapor Deposition (PECVD) thechniques. This alternating growth was achieved with a computer controlled interface using a LabView code.
The semiconductor quantum dots were grown by femto second laser ablation of a PbTe target using an ultra short pulsed laser (100 fs; 1 mJ) at a central wavelength of 200 nm.
The glass matrix was fabricated by a plasma chemical vapor deposition method using vapor of tetramethoxysilane (TMOS) as precursor. The structural and optical properties of the multilayer were studied.

SiO2-based variable microfluidic lenses fabricated by femtosecond laser lithography-assisted micromachining (Paper Presentation)
Paper 7039-13 of Conference 7039
Authors(s): Mizue Mizoshiri, Hiroaki Nishiyama, Osaka Univ. (Japan); Junji Nishii, National Institute of Advanced Industrial Science and Technology (Japan); Yoshinori Hirata, Osaka Univ. (Japan)
Date: Wednesday, 13 August 2008
SiO2-based variable microfluidic lenses were fabricated by femtosecond laser lithography-assisted micromachining, which was a proposed combined process of femtosecond laser lithography and plasma etching. Resist patterns of continuous-relief micro-Fresnel lenses were directly written inside chemically amplified negative-tone photoresist on SiO2-based microchannels of 250 um width and 6 um depth using nonlinear optical effects induced by femtosecond laser pulses. SiO2-based micro-Fresnel lenses with smooth surface were formed on the bottom of microchannels by plasma etching. The characteristics of these variable microlenses will be reported in detail.

Femtosecond micro- and nano-machining of materials for microfluidic applications (Paper Presentation)
Paper 7039-18 of Conference 7039
Authors(s): Yelena V. White, Matthew Parrish, Xiaoxuan Li, Lloyd Davis, William Hofmeister, Univ. of Tennessee Space Institute
Date: Wednesday, 13 August 2008
Ultrafast laser micromachining is a promising candidate for micro- and nano-fabrication technology. Due to the high precision of femtosecond ablation, laser-machined features can be added to lithography-prototyped device. To accomplish that, parametric studies of laser interrogation of materials of interest are necessary. We present femtosecond laser ablation studies of glass, PDMS, fused silica, and diamond films. Samples were ablated by 800 nm with pulse width of 200 fs laser and repetition rates of up to 250 kHz. Our results include single- and multi-pulse laser machining for fluidic and photonic devices. Feature size and structural dependences on ablation rates are discussed.

Femtosecond shape transformation dynamics of silver nanoparticles in glass (Paper Presentation)
Paper 7032-80 of Conference 7032
Authors(s): Ahmet A. Unal, Andrei Stalmashonak, Gerhard Seifert, Heinrich Graener, Martin-Luther Univ. Halle-Wittenberg (Germany)
Date: Thursday, 14 August 2008
Irradiation of spherical silver nanoparticles in glass by linearly-polarized femtosecond laser pulses close to the surface plasmon resonance results in irreversible shape transformations. To investigate the transformation dynamics we introduce a single-color double-pulse experiment, where the sample is irradiated by two time-delayed pulses of equal intensity. Varying the delay between pulses upto 1 ns and analyzing the shift of polarized absorption bands for each delay give valuable information on the evolution of shape transformations. Possible transformation mechanisms including electron gas thermalization, electron-phonon coupling and excess energy transfer from the nanoparticle to the glass matrix are observed and discussed.

Optical pulse shaping and applications (Paper Presentation)
Paper 7062-6 of Conference 7062
Authors(s): Andrew M. Weiner, Purdue Univ.
Date: Monday, 11 August 2008
Femtosecond optical pulse shaping is by now an established technology allowing generation of essentially arbitrary ultrafast optical waveforms according to user specification. Waveform generation is accomplished via a Fourier synthesis method, which reflects phase, amplitude, and polarization information placed onto the optical spectrum via a spatial light modulator. Applications span lightwave communications, coherent control of quantum mechanical processes, few femtosecond pulse compression, nonlinear optical microscopy, and microwave photonics. In this talk I will first discuss the basics of pulse shaping and then survey recent topics of interest within my group at Purdue University.

Dispersion compensation of femtosecond laser pulses by maximising a second harmonic signal with a feedback loop containing a genetic search algorithm and an acoustic-optic modulator (Poster Presentation)
Paper 7062-51 of Conference 7062
Authors(s): Andrew Mori, Univ. Stellenbosch (South Africa) and CSIR National Laser Ctr. (South Africa); Lourens R. Botha, Anton du Plessis, Ted Roberts, Hendrik Maat, CSIR National Laser Ctr. (South Africa)
Date: Monday, 11 August 2008
No description available
Silica-based diffractive/refractive hybrid microlenses fabricated by multiphoton lithography (Poster Presentation)
Paper 7056-55 of Conference 7056
Authors(s): Hiroaki Nishiyama, Mizue Mizoshiri, Osaka Univ. (Japan); Junji Nishii, National Institute of Advanced Industrial Science and Technology (Japan); Yoshinori Hirata, Osaka Univ. (Japan)
Date: Tuesday, 12 August 2008
SiO2-based diffractive/refractive hybrid microlenses were created by use of femtosecond laser lithography-assisted micromachining (FLAM). Diffractive optical elements of inorganic materials are expected to be used for optical interconnection, information appliances, and so on. In this study, we proposed the FLAM for microfabrication upon nonplanar surfaces such as lens structures, which was difficult for conventional photolithography technique. By use of femtosecond laser-induced nonlinear optical absorption, the fine resist patterns were formed even on nonplanar substrates. We could obtain SiO2 microFresnel lens upon convex lenses after pattern transfer by plasma. FLAM is one of effective ways for integrated photonic devices.

Ultrafast diagnostics of energy transfer in photovoltaic materials (Paper Presentation)
Paper 7047-11 of Conference 7047
Authors(s): Xianfan Xu, Purdue Univ.
Date: Wednesday, 13 August 2008
In this work, we investigate the ultrafast energy conversion process in photovoltaic materials. We employ a femtosecond laser based technique to excite coherent optical phonons in nanostructured photovoltaic materials. The femtosecond time-resolved measurements allow us to determine the energy transfer process during the photo-excitation process and the energy coupling from electrons to phonons. By measuring the phonon decay time, we are able to investigate electron-phonon interaction and phonon-phonon interaction in details. The possibility of extending the free electron lifetime using nanostructured materials, which is one of the approaches for increasing the efficiency of the photovoltaic materials is also investigated.

Near-IR enhanced position-sensitive avalanche photodiodes (Paper Presentation)
Paper 7055B-20 of Conference 7055B
Authors(s): Richard A. Myers, Richard Farrell, Frank Robertson, Radiation Monitoring Devices, Inc.; James E. Carey, SiOnyx Inc.; Eric Mazur, Harvard Univ.
Date: Monday, 11 August 2008
A processing method employing a Ti-sapphire femtosecond laser was used for microstructure the surface of position-sensitive silicon avalanche photodiodes (PSAPDs) and enhancing their near-infrared response. Experiments were performed on APDs using a series of microstructuring parameters and high-temperature annealing steps. Using the optimized technique, we were able to fabricate APDs with quantum efficiencies as high as 58% at 1064 nm. This enhanced near-infrared response has been realized in both lateral effect and quadrant-type PSAPDs without altering their electronic noise, maximum avalanche gain or position resolution.

Nonlinear optical properties of neat and DNA-CTMA doped dendritic chromophores (Paper Presentation)
Paper 7040-9 of Conference 7040
Authors(s): Anna Samoc, Marek J. Samoc, The Australian National Univ. (Australia); Tzu-Chau Lin, National Central Univ. (Taiwan); Barry Luther-Davies, The Australian National Univ. (Australia); James G. Grote, Air Force Research Lab.
Date: Tuesday, 12 August 2008
Negative values of the nonlinear refractive index, Re(n2), related to the real part of the complex hyperpolarizability gamma, and a strong multi-photon absorption were observed in a broad spectral range, 520 nm ?1600 nm with the femtosecond Z-scan technique in a family of dendritic compounds built of triphenylamine and fluorene units. The studies performed in the deoxyribonucleic acid - cetyltrimethylammonium complex (DNA-CTMA) doped with the chromophores at various molar ratios of the DNA base pairs to the dye in the range from 100:1 to 2:1, indicated enhancement of the fluorescence and of the nonlinear optical response.

Pump probe experiment for light scattering media diagnosis (Paper Presentation)
Paper 7065-34 of Conference 7065
Authors(s): Marie Barthelemy, Thibault Dartigalongue, Laurent Hespel, Nicolas Rivi鑢e, ONERA (France); G閞ard Gr閔an, Univ. de Rouen (France)
Date: Tuesday, 12 August 2008
Optical density measurement is a very powerful tool to characterize particle size and physical property of diffuse media such as jets and engine injection. The major difficulty of such a measurement is the tremendous amount of diffused light : for such media, the optical density can be greater than 10. The goal of this work is to develop a new experimental tool, based on femtosecond laser technology in order to isolate (spatially and temporally) a very limited amount of non diffused transmitted light, and to measure the extinction of diffuse media.

Surface plasmon resonance linear and nonlinear response in a single metal nanoparticle (Paper Presentation)
Paper 7033-44 of Conference 7033
Authors(s): Hatim Baida, Aurelien Crut, Paolo Maioli, Univ. Claude Bernard Lyon 1 (France); Natalia Del Fatti, Univ Claude Bernard Lyon 1 (France); Fabrice Vallee, Univ. Claude Bernard Lyon 1 (France)
Date: Wednesday, 13 August 2008
The results of the linear and nonlinear response of a single metal nanoparticle investigated using the spatial modulation technique combined with ultrafast femtosecond spectroscopy will be discussed. Quantitative information on the surface plasmon resonance characteristics in silver nanospheres and on the optical nonlinearity in single gold nanorods will be presented.

Invited Paper

Nonlinear optical properties of quantum sized gold clusters (Paper Presentation)
Paper 7049-21 of Conference 7049
Authors(s): Theodore G. Goodson III, Guda Ramakrishna, Univ. of Michigan; Lee Dongil, Western Michigan Univ.
Date: Thursday, 14 August 2008
Research on gold clusters comprising of few tens to hundreds of atoms has received great deal of research attention since they bridge the properties of isolated gold to clusters to nanoparticle and consequent molecule to metal transition1. Here, we have systematically followed the femtosecond excited state dynamics and nonlinear optical properties (two-photon absorption, TPA) of gold clusters comprising of 25 atoms to 140, 309 and all the way up to 2406 atoms in an attempt to realize such metal to molecule transition.

Avalanche photodiode time-resolved diagnostics for interaction experiment (Poster Presentation)
Paper 7077-60 of Conference 7077
Authors(s): Josef Blazej, Czech Technical Univ. in Prague (Czech Republic); Ladislav Pina, Czech Technical Univ. in Prague (Czech Republic) and Reflex s.r.o. (Czech Republic); Miroslava Vrbova, Alexandr Jancarek, Ivan Prochazka, Czech Technical Univ. in Prague (Czech Republic)
Date: Monday, 11 August 2008
We have designed, developed and tested the avalanche diode structures operational as single photon counters with picosecond resolution on the basis of the GaP material. The preliminary results of interaction experiments with femtosecond laser and solid state target are presented. Timing resolution of solid state photon counters as high as 60 picoseconds full width at a half maximum has been achieved when detecting single photon signals. The advantage of low operating voltage is discussed. The timing resolution and signal to noise ration is presented for different detector configuration, using active or passive quenching circuit.

Fringe-resolved interferometric autocorrelation of ultrashort-pulsed Bessel-like beams (Paper Presentation)
Paper 7063-36 of Conference 7063
Authors(s): Silke Huferath, Bremer Institut f黵 Angewandte Strahltechnik (Germany); Volker Kebbel, Bremer Werk fur Montagesysteme (Germany); Martin Bock, Ruediger Grunwald, Max-Born-Institut f黵 Nichtlineare Optik und Kurzzeitspektroskopie (Germany)
Date: Tuesday, 12 August 2008
In fringe-resolved noncollinear autocorrelation, ultrashort pulses of interest are split by an interferometric setup into nearly identical replica which are superimposed in a certain angle thus enabling a self-referential measurement by analyzing fringe envelopes. Temporal information is extracted by detecting higher order autocorrelation functions after frequency conversion. Here we report on a modified fringe-resolved technique based on analyzing the radial fringe envelope of Bessel-like beams and beam arrays. In comparison to the classical method, an appropriate mathematical transform has to be applied. Experiments with pulse durations in few-femtosecond range were performed.

Plasmonic metamaterials and their applications (Paper Presentation)
Paper 7033-53 of Conference 7033
Authors(s): Igor I. Smolyaninov, BAE Systems
Date: Wednesday, 13 August 2008
Linear and nonlinear optical properties of two-dimensional plasmonic metamaterials consisting of alternating layers of metal-vacuum and metal-dielectric interfaces prepared on different substrates will be discussed. Imaging and focusing applications of these metamaterials will be presented. Femtosecond plasmon-induced changes in the magnetic anisotropy of the iron garnet substrate will be presented. This effect is found to be similar to the previously reported photo-induced magnetic anisotropy in this material. However, its dependence on the polarization of the
light and orientation of the magnetization is found to be different and it's magnitude appears to be enhanced. This plasmonic control of the spins opens new interesting avenues for all-optical ultrafast control of the magnetization at a nanometer length scale.

Ultrashort relativistic electron bunches and spatio-temporal radiation biology (Paper Presentation)
Paper 7080-1 of Conference 7080
Authors(s): Yann A. Gauduel, Jerome Faure, Victor Malka, Ecole Nationale Sup閞ieure de Techniques Avanc閑s (France)
Date: Thursday, 14 August 2008
The intensive developments of terawatt Ti:Sa lasers have permitted to extend laser-plasma interactions into the relativistic regime and to provide very-short particles bunches in the MeV energy range. A combination with femtosecond near-IR optical pulses might conjecture the real-time investigation of penetrating radiation effects. This emerging domain involves high-energy radiation femtochemistry for which the early energy deposition is decisive for the prediction of cellular and tissular radiation damages. It is shown that short range electron-biosensor interactions lower than 10 Ă take place in nascent ionisation tracks. High-quality ultrashort particle beams open opportunities for spatio-temporal radiation biology, cancer therapy and nanomedicine.

Modulating the optical response of thin-film structures by a nanoscale phase transition (Paper Presentation)
Paper 7041-17 of Conference 7041
Authors(s): Richard F. Haglund, Jr., Vanderbilt Univ.
Date: Thursday, 14 August 2008
Vanadium dioxide undergoes a reversible semiconductor-to-metal transition (SMT) near 70˚C, transforming the crystal structure from monoclinic to rutile. The SMT can be induced either thermally, or by band-to-band laser excitation on a femtosecond time scale. The hysteresis in the optical reflection or transmission associated with the SMT exhibits intensity-, size-, shape- and curvature-dependent effects that open the door to a variety of technological applications for nanostructured VO2. In composite nanostructures combining VO2 with noble metals, the change in the dielectric function effected by the SMT can be used to modulate the plasmonic response of noble-metal nanostructures on an ultrafast time scale.

Nanoparticle-assembled catalysts for solar hydrogen generation from water (Paper Presentation)
Paper 7044-19 of Conference 7044
Authors(s): Frank E. Osterloh, Univ. of California/Davis
Date: Thursday, 14 August 2008
We present a modular strategy to build photochemical water splitting catalysts by linkage of CdSe, KCa2Nb3O10, or K4Nb6O17 nanosheets and Pt or IrO2 nanoparticles. The structures are supported by direct covalent bonds or by aminoalkylsilane linkers. Upon ultraviolet or visible irradiation all composites are active for photocatalytic hydrogen evolution from water, with the activity depending on the nature of the linkers and on the components. Femtosecond absorption spectroscopy and electrochemistry were used to probe charge generation and transport in these structures and across the nanoparticle-solution interfaces. The nanostructures were also characterized with electron microscopy, and visible and fluorescence spectroscopy.

A bio-inspired single photon detector with suppressed noise and low jitter (Paper Presentation)
Paper 7035-31 of Conference 7035
Authors(s): Omer G. Memis, Alex Katsnelson, Hooman Mohseni, Northwestern Univ.; Minjun Yan, Shuang Zhang, Tim Hossain, Niu Jin, Ilesanmi Adesida, Univ. of Illinois at Urbana-Champaign
Date: Thursday, 14 August 2008
A single photon detector for short wave infrared spectrum was conceived. The detection mechanism is conceptually based on biological inspirations taken from the eye. The detectors provide internal amplification to achieve gain values reaching 10,000 with bias voltages around 1 V for imaging applications. Ultra-low noise levels were measured at gain values exceeding 4,000 at room temperature. An alternate version of the detector, specialized towards high-speed applications, was also developed. Fast detectors with bandwidth beyond 3 GHz were demonstrated which provide gain values around 20. Femtosecond pulsed illumination measurements exhibited ultra-low jitter around 15 ps, consistent with statistically stable nature of amplification.

Nanoscale melting and ablation using near-field plasmonic effects of gold nanorods on silicon (Poster Presentation)
Paper 7032-90 of Conference 7032
Authors(s): Rick K. Harrison, Nick Durr, Adela Ben-Yakar, The Univ. of Texas at Austin
Date: Wednesday, 13 August 2008
The near-field confinement of femtosecond lasers for material ablation has potential for applications ranging from nanosurgery to nanolithography. Gold nanorods have tunable plasmon resonances that can be exploited to achieve large enhancements of the electromagnetic fields near the particle for ablation on the nanometer scale. We investigate the near-field enhancement from gold nanorods to better understand the interaction between laser light and the plasmon oscillations. We demonstrate the melting of individual gold nanorods and the ablation of material below nanorods, both of which have been found to be fluence and orientation dependent. Nanorods and surfaces were observed before and after irradiation using high-resolution scanning electron and atomic force microscopy. Gold nanorods were deposited on silicon (100) and irradiated at resonance. Experiments were performed in air and water environments to observe the effect of medium on the ablation, particle removal and melting characteristics. In addition to experimental results, we present simulations of nanorods using discrete dipole approximation (DDA) and finite-difference time-domain (FDTD) codes, which are benchmarked using Mie theory for gold spheres. The effect of substrates on the enhancement has also been studied computationally with a model including low-density plasma formation with increased absorption. Enhancement was demonstrated through the observed modification of silicon near gold nanorods below the unenhanced threshold. This enhancement effect was compared with predicted values from simulations. We have also studied the polarization dependence of energy absorption characteristics. Lastly, we estimate the threshold melting fluence for gold nanorods with experiments and theoretical predictions.

Micro-optic array applications in terawatt ultrafast laser amplifiers (Paper Presentation)
Paper 7062-3 of Conference 7062
Authors(s): Barry C. Walker, Isaac Ghebregziabher, Sasi Palaniyappan, Anthony DiChiara, Univ. of Delaware
Date: Monday, 11 August 2008
Recent developments in micro-optics offer the potential of higher power, more robust ultrafast laser technology operating at high efficiency. Results using micro-optic lenslet arrays in an ultrafast, Ti:sapphire terawatt amplifier are presented. We report a final ultrafast amplified laser mode can be shaped to within 1% of the target Gaussian at a pump energy to laser pulse energy conversion efficiency of 35%. Focusing studies demonstrate the laser system with microlens arrays can achieve a peak intensity of 10^(19) W/cm^2. Future applications of microlens arrays in 100 terawatt and possibly petawatt peak power systems will be discussed.

Photonic bandgap and ultrafast lasers: IR photodetectors phenomenology and novel applications (Paper Presentation)
Paper 7055B-18 of Conference 7055B
Authors(s): Michael K. Rafailov, RICHER International LLC
Date: Monday, 11 August 2008
Unique feature of an ultra-fast laser is its ability to 揵leach?of an IR photodetector for a period of time that proportional to free carrier lifetime and comparable with detector raise time. Ultra-fast laser 揵leaching?capability opens almost unlimited opportunities in IR photonics novel applications, especially in defense and military areas. In this paper we will discuss applications of ultra-fast and, to some extends ?fast lasers to Advanced Directional Laser Based Infrared Countermeasures-IRCM, Laser Low Observables and military platform signature reduction as well as broader sensing and counter-sensing capabilities. Presented physical and mathematical models of the interaction process helps expand qualified laser pulse dwell time to pico-second and, to some extends, to nano-second pulse range.

Ultrafast optical switching and laser dynamics in distributed feedback polymer lasers (Paper Presentation)
Paper 7051-47 of Conference 7051
Authors(s): Stefano Perissinotto, Margherita Zavelani-Rossi, Marco Carvelli, Guglielmo Lanzani, Politecnico di Milano (Italy); Marco Salerno, Instituto Italiano di Tecnologia (Italy); Giuseppe Gigli, Univ. degli Studi di Lecce (Italy)
Date: Tuesday, 12 August 2008
In this work the photon-exciton and laser dynamics of organic distributed feedback lasers are investigated by applying the pump-probe technique to devices under operation [1].
Moreover we demonstrate a range of modulation techniques, including optical gating and two photon pumping . We mainly show all optical control of the laser by applying a gating pulse, which completely switch-off emission in the sub-ps time scale and may represent a possible way for integration of organic photonics . The switching mechanism is assigned to photo-injection of charge carriers induced by the gate transition [2].

[1] M. Zavelani-Rossi, S. Perissinotto, G. Lanzani, M. Salerno, G. Gigli, Appl. Phys. Lett. 89, 181105 (2006).
[2] S. Perissinotto, G. Lanzani, M. Zavelani-Rossi, M.Salerno, G. Gigli, Appl. Phys. Lett. 91, 191108 (2007).

Ultrafast optical switching and laser dynamics in distributed feedback polymer lasers (Paper Presentation)
Paper 7049-47 of Conference 7049
Authors(s): Stefano Perissinotto, Margherita Zavelani-Rossi, Marco Carvelli, Guglielmo Lanzani, Politecnico di Milano (Italy); Marco Salerno, Instituto Italiano di Tecnologia (Italy); Giuseppe Gigli, Univ. degli Studi di Lecce (Italy)
Date: Tuesday, 12 August 2008
In this work the photon-exciton and laser dynamics of organic distributed feedback lasers are investigated by applying the pump-probe technique to devices under operation [1].
Moreover we demonstrate a range of modulation techniques, including optical gating and two photon pumping . We mainly show all optical control of the laser by applying a gating pulse, which completely switch-off emission in the sub-ps time scale and may represent a possible way for integration of organic photonics . The switching mechanism is assigned to photo-injection of charge carriers induced by the gate transition [2].

[1] M. Zavelani-Rossi, S. Perissinotto, G. Lanzani, M. Salerno, G. Gigli, Appl. Phys. Lett. 89, 181105 (2006).
[2] S. Perissinotto, G. Lanzani, M. Zavelani-Rossi, M.Salerno, G. Gigli, Appl. Phys. Lett. 91, 191108 (2007).

Recent advances on multiple channel unequally spaced optical phased array for ultrafast LADAR (Poster Presentation)
Paper 7056-47 of Conference 7056
Authors(s): Shizhuo Yin, Jae Hun Kim, The Pennsylvania State Univ.; Paul B. Ruffin, Eugene Edwards, Christina L. Brantley, U.S. Army Aviation and Missile Research, Development and Engineering Ctr.; Claire Luo, General Opto Solutions, LLC
Date: Tuesday, 12 August 2008
In this paper, we review the recent advance on our research project related to the unequally spaced multiple channel optical phased array. It clearly shows that as the number of channels increases,the angular width of the main lobe becomes narrower and narrower. Furthermore, the level of the side grating lobes also decreases significantly. Thus,highly accurate, ultrafast tuning speed beam scanning can be realized by employing multiple channel unequally spaced optical phased array, which can be very useful for the high performance next generation LADAR.

A two-pass Sagnac loop for high-contrast ultrafast switching at 1053nm (Paper Presentation)
Paper 7072-38 of Conference 7072
Authors(s): Alain Jolly, S閎astien Jonathas, Commissariat ?l'Energie Atomique (France); Jacques Luce, Commissariat a l'Energie Atomique (France); Herve Coic, Jean-Fran鏾is Gleyze, Commissariat ?l'Energie Atomique (France); Sophie Letourneur, Patrice Le Boudec, IDIL Fibres Optiques (France)
Date: Wednesday, 13 August 2008
We demonstrate a fully polarization - maintaining Sagnac setup, for gating applications in the range of laser wavelengths of interest for ICF needs. Our design involves two propagation paths with two highly different wavelengths, i.e. 1053nm for the signal and 1550nm for switching. The optical architecture is operated using properly controlled nonlinear effects within a unique Sagnac loop. The sub - picosecond synchronization of the two propagation paths helps to compensate for any unwanted depolarization effect and manage the switching issues within a wide range of signal bandwidths. A comprehensive model is proposed to discuss the optical performance.

Ultrafast diagnostics of energy transfer in photovoltaic materials (Paper Presentation)
Paper 7047-11 of Conference 7047
Authors(s): Xianfan Xu, Purdue Univ.
Date: Wednesday, 13 August 2008
In this work, we investigate the ultrafast energy conversion process in photovoltaic materials. We employ a femtosecond laser based technique to excite coherent optical phonons in nanostructured photovoltaic materials. The femtosecond time-resolved measurements allow us to determine the energy transfer process during the photo-excitation process and the energy coupling from electrons to phonons. By measuring the phonon decay time, we are able to investigate electron-phonon interaction and phonon-phonon interaction in details. The possibility of extending the free electron lifetime using nanostructured materials, which is one of the approaches for increasing the efficiency of the photovoltaic materials is also investigated.

Ultrafast adaptive optical near-field control in nanoplasmonic (Paper Presentation)
Paper 7032-58 of Conference 7032
Authors(s): Martin Aeschlimann, Univ. Kaiserslautern (Germany)
Date: Wednesday, 13 August 2008
The optical response of nanostructures exhibits fascinating properties, such as subwavelength variation of the field, local field enhancement, and local fields with vector components perpendicular to those of the incident field. Moreover, the combination of ultrafast laser spectroscopy, i.e. illumination with broadband coherent light sources, and near-field optics opens a new realm for nonlinear optics on the nanoscale. First experiments demonstrating the manipulation of nanoscopic local near-fields on sub-diffraction length scales by the use of a coherent control scheme on a ultrafast time scale will be presented. Silver nanoparticles manufactured by e-beam lithography are illuminated with ultrashort polarization shaped laser pulses. The induced local near-field distribution is mapped by the two-photon photoemission pattern as recorded using a photoemission electron microscope (PEEM). The observed emission pattern critically depends on the polarization state of the incident laser pulse. Furthermore, it is demonstrated that adaptive polarization pulse shaping allows optimizing a particular emission pattern with sub-diffraction resolution. First spatio-temporal control experiments will be shown.

Ultrafast local investigations of plasmonic structures (Paper Presentation)
Paper 7032-59 of Conference 7032
Authors(s): Laurens Kuipers, FOM Institute for Atomic and Molecular Physics (Netherlands)
Date: Wednesday, 13 August 2008
Both plasmonic and periodic structures can exert a huge control over electromagnetic waves at the nanoscale. The result may be slow light in photonic crystal waveguides or huge field enhancements near metal nanostructures. With plasmonic crystals we gain the best of both worlds. Visualization of the propagation with subwavelength resolution allows the optical properties to be unravelled in detail. With a time-resolved near-field microscope we have tracked plasmonic wavepackets (duration 100 fs) as they propagate. We show that plasmons in periodic structures obey Bloch's theorem. Moreover, we can slow the wavepackets down for their entire bandwidth (~4 THz).

Optics of photonic band gap crystals: Spontaneous emission control and ultrafast switching (Paper Presentation)
Paper 7031-10 of Conference 7031
Authors(s): Willem Vos, Univ. Twente (Netherlands) and FOM Institute for Atomic and Molecular Physics (Netherlands)
Date: Thursday, 14 August 2008
I will discuss latest results on nano-fabrication, spontaneous emission control, and ultrafast switching. We have systematically studied quantum efficiency and oscillator strength of semiconductor quantum dots. The results shed new light on the electron and hole wavefunction overlap. We observe modified spontaneous emission in 3D photonic crystals with new phenomena on quantum dots, laser dyes, and even biological emitters.
To switch semiconductor photonic crystal structures, we homogeneously excite the systems by two-photon processes. We observe intricate behavior due to competing electronic Kerr and free-carriers effects. We observe ultrafast changes of cavity resonances and quality factors. Possible applications will be assessed.

Light-activated ultrafast magneto-optic switches (Paper Presentation)
Paper 7056-28 of Conference 7056
Authors(s): Shizhuo Yin, Chia-En Yang, Meng-Ku Chen, The Pennsylvania State Univ.
Date: Thursday, 14 August 2008
In this paper, we present our recent work on light activated ultrafast magneto-optic switch by integrating the ultrafast magneto-optic switch with a linear photoconductive switch. The experimental result demonstrats that a ns range switching speed can be achieved. Furthermore, the delay time between the light activation and the optical switching time is in the sub-ns range.

Ultrafast pulse characterization using XPM in silicon (Paper Presentation)
Paper 7056-39 of Conference 7056
Authors(s): Nuh S. Yuksek, Xinzhu Sang, En-Kuang Tien, Qi Song, Feng Qian, Ivan V. Tomov, Ozdal Boyraz, Univ. of California/Irvine
Date: Thursday, 14 August 2008
High intrinsic nonlinearity enhanced by the tight modal confinement make Silicon an ideal platform for chip scale nonlinear optical applications. Based on the cross-phase modulation (XPM) of chirped supercontinuum (SC) pulses by short pulses, we show that pulse profiles in time domain can be mapped into spectral domain in a chip scale. Experimentally we measure 2.4ps pulses by mapping them into spectral domain by using a linearly-chirped SC pulse and a 1.7 cm Silicon chip. Due to time wavelength mapping, this phenomenon can be utilized to characterize amplitude and phase information of short pulses in real time.

Development of ultrafast laser-based x-ray in vivo phase-contrast micro-CT beamline for biomedical applications at Advanced Laser Light Source (ALLS) (Paper Presentation)
Paper 7078-43 of Conference 7078
Authors(s): Russell E. Kincaid, Syracuse Univ.; Andrzej Krol, Upstate Medical Univ./SUNY and Syracuse University; Jean-Claude Kieffer, Marina Servol, Univ. du Qu閎ec (Canada); Levon Vogelsang, Syracuse Univ.; Sylvain Fourmaux, Univ. du Qu閎ec (Canada); Stephen W. Wilkins, Andrew W. Stevenson, Timur E. Gureyev, Yakov I. Nesterets, Commonwealth Scientific and Industrial Research Organisation (Australia); Edward D. Lipson, Syracuse University and Upstate Medical Univ./SUNY; Hongwei Ye, Syracuse Univ.; Andrew Pogany, Commonwealth Scientific and Industrial Research Organisation (Australia)
Date: Thursday, 14 August 2008
We are developing in vivo, in-line holography, x-ray phase-contrast micro-CT with an ultrafast laser-based x-ray source. This will exceed the capabilities of conventional micro-CT, by offering superior contrast resolution and multienergy imaging. Tomographic data were acquired for phantoms and euthanized mouse in two imaging geometries, with magnification M = 1.28 and 2.05. Images were compared to those acquired using a commercial micro-CT scanner. The major obstacle to date is long-term instability in x-ray production by ultrafast laser. We are working towards stable, ultrafast laser-produced, x-ray generation to enable fast, high-resolution, in vivo scans.

An investigation of the ultrafast electron transfer between oligothiophenes and thieno[3,4-b]thiophene units (Paper Presentation)
Paper 7034-2 of Conference 7034
Authors(s): Jodi M. Szarko, Northwestern Univ. and Argonne National Lab.; Jianchang Guo, Argonne National Lab. and University of Chicago; Yongye Liang, Luping Yu, The Univ. of Chicago; Lin X. Chen, Northwestern Univ. and Argonne National Lab.
Date: Monday, 11 August 2008
A new copolymer system based on alkyl oligothiophene/thieno[3,4-b]thiophene blocks in random sequences has shown the potential for creating more efficient photovoltaic (OPV) solar cells. We studied both the ultra-fast interactions between these two monomeric units when they are linked in the copolymers and their interactions with the electron acceptor PCBM in order to determine the transport mechanisms in these systems. Three oligomeric molecules have been synthesized to model the local interactions in the polymers. By performing transient absorption and up-conversion measurements, the nature of the early electron transfer and transport between these different units is elucidated.

Interfacial charge carrier dynamics and excitation transport in a photovoltaic polymer blend observed with ultrafast vibrational spectroscopy (Paper Presentation)
Paper 7034-3 of Conference 7034
Authors(s): John B. Asbury, Ryan D. Pensack, Larry W. Barbour, Maureen Hegadorn, The Pennsylvania State Univ.
Date: Monday, 11 August 2008
The dynamics of photoinduced charge separation are examined in a polymer blend photovoltaic material with ultrafast two-dimensional infrared and visible pump ? infrared probe spectroscopy. The carbonyl (C=O) stretch of PCBM is probed as a local vibrational reporter of the dynamics in a blend with a conjugated polymer, CN-MEH-PPV. Following interfacial electron transfer, geminate electron ?hole pair dissociation occurs on ultrafast timescales from 100 fs to 100 ps. Geminate charge recombination is also observed within a 100 ps window. Interfacial electron transfer continues on the 100 ps to 3 ns timescales as excitations in the polymer diffuse to the PCBM interfaces.

Optical pulse shaping and applications (Paper Presentation)
Paper 7062-6 of Conference 7062
Authors(s): Andrew M. Weiner, Purdue Univ.
Date: Monday, 11 August 2008
Femtosecond optical pulse shaping is by now an established technology allowing generation of essentially arbitrary ultrafast optical waveforms according to user specification. Waveform generation is accomplished via a Fourier synthesis method, which reflects phase, amplitude, and polarization information placed onto the optical spectrum via a spatial light modulator. Applications span lightwave communications, coherent control of quantum mechanical processes, few femtosecond pulse compression, nonlinear optical microscopy, and microwave photonics. In this talk I will first discuss the basics of pulse shaping and then survey recent topics of interest within my group at Purdue University.

Surface plasmon resonance linear and nonlinear response in a single metal nanoparticle (Paper Presentation)
Paper 7033-44 of Conference 7033
Authors(s): Hatim Baida, Aurelien Crut, Paolo Maioli, Univ. Claude Bernard Lyon 1 (France); Natalia Del Fatti, Univ Claude Bernard Lyon 1 (France); Fabrice Vallee, Univ. Claude Bernard Lyon 1 (France)
Date: Wednesday, 13 August 2008
The results of the linear and nonlinear response of a single metal nanoparticle investigated using the spatial modulation technique combined with ultrafast femtosecond spectroscopy will be discussed. Quantitative information on the surface plasmon resonance characteristics in silver nanospheres and on the optical nonlinearity in single gold nanorods will be presented.

Invited Paper

Dynamics on the nanoscale: time-domain ab initio studies of quantum dots and carbon nanotubes (Paper Presentation)
Paper 7044-13 of Conference 7044
Authors(s): Oleg V. Prezhdo, Univ. of Washington
Date: Wednesday, 13 August 2008
Harvesting and applications of solar energy requires an understanding of the dynamical response of novel materials on the nanometer scale. We have developed state-of-the-art non-adiabatic molecular dynamics techniques and implemented them within time-dependent density functional theory in order to model the ultrafast photoinduced processes in these materials at the atomistic level, and in real time. The talk will focus on the photo-initiated charge transfer at the molecule-semiconductor interfaces and multiple excitons which can be generated in semiconductor quantum dots in competition with various relaxation processes.

Attosecond nanoplasmonic field microscope (Paper Presentation)
Paper 7033-12 of Conference 7033
Authors(s): Mark I. Stockman, Georgia State Univ.; Matthias F. Kling, Max-Planck-Institut f黵 Quantenoptik (Germany); Ulf Kleineberg, Ludwig-Maximilians-Univ. M黱chen (Germany); Ferenc Krausz, Max-Planck-Institut f黵 Quantenoptik (Germany)
Date: Sunday, 10 August 2008
Recently, there has been an increased attention and rapid development in the field of nanoscale collective electronic dynamics on surfaces of metal nanostructures, which is due to excitations called surface plasmons. Due to their broad spectral bandwidth, the surface plasmons possess ultrafast dynamics, with times as short as a few hundreds attoseconds. The associated spatio-temporal dynamics of the local optical fields in nanoplasmonic systems so far has been hidden from direct (in the real space and time domain) access. The concept presented in this talk will provide the direct, non-invasive access to the nanoplasmonic collective dynamics with nanometer spatial resolution and ~100 as temporal resolution. This approach combines two modern techniques, photoelectron emission microscopy and attosecond streaking spectroscopy. It can be used in fundamental nanoplasmonics and its various existing and potential applications.

Modeling photoinduced reaction dynamics and coherent control in sensitized semiconductor surfaces (Paper Presentation)
Paper 7034-11 of Conference 7034
Authors(s): Victor S. Batista, Yale Univ.
Date: Monday, 11 August 2008
Recent studies of semiconductor surfaces, functionalized with organic and inorganic molecules, will be presented. The first half of the talk will address the problem of visible-light sensitization of TiO2 surfaces, covalently modified with Mn complexes suitable for water splitting. The undelying activation of surface catalyst by ultrafast interfacial electron transfer will be discussed at the detailed molecular level. The second half of the talk will describe the feasibility of using sequences of unitary laser pulses for coherent control of superexchange electronic tunneling in sensitized TiO2 surfaces. The reported results are particularly relevant for understanding coherent optical manipulation of electronic excitations in semiconductor devices where performance can be limited by quantum tunneling and decoherence.

Colloidal quantum dot doped core photonic crystal fibers (Paper Presentation)
Paper 7030-23 of Conference 7030
Authors(s): Gilberto J. Jacob V.D.M., Diogo D. Almeida, Enver F. Chillcce, Wagner M. Faustino, Andr?A. de Thomaz, Eugenio Rodriguez, Luiz C. Barbosa, Carlos L. Cesar, Univ. Estadual de Campinas (Brazil)
Date: Tuesday, 12 August 2008
Quantum Dot [QD] doped optical fibers have attracted much attention due to their huge potential for the development of a broad class of photonic devices, from ultrafast optical switching to biosensors. The long optical path in optical fibers can enhance the quantum dot optical properties by several orders of magnitude compared to bulk devices or even to short waveguide structures. In the past we have been able to produce PbTe quantum dot doped core and undoped clad tellurite glass optical fibers after an enormous effort to match the thermo-physical and the optical properties of both glasses. We then decided to go for tellurite glass photonic crystal fiber because we could use the same glass for core and cladding to avoid the thermophysical mismatch.

Exciton dynamics in self-assembled molecular nanotubes and near dielectric nanorods (Paper Presentation)
Paper 7034-15 of Conference 7034
Authors(s): Jasper Knoester, Univ. of Groningen (Netherlands)
Date: Tuesday, 12 August 2008
Recent advances in molecular synthesis have enabled the creation of self-assembled double-wall molecular nanotubes, in which the primary optical excitations are Frenkel excitons. These tubes may act as artificial light-harvesting systems. Optical experiments reveal intriguing phenomena, such as ultrafast energy transport between both walls, color-dependent nonexponential fluorescence decay, and a dynamic Stokes shift. We show that these properties may be understood at a quantitative level by using a theory that includes weak exciton-vibration coupling. I will also address theoretically how exciton transport between two molecules (F鰎ster transfer) may be focused by placing both molecules near a dielectric nanorod.

Plasmonic metamaterials and their applications (Paper Presentation)
Paper 7033-53 of Conference 7033
Authors(s): Igor I. Smolyaninov, BAE Systems
Date: Wednesday, 13 August 2008
Linear and nonlinear optical properties of two-dimensional plasmonic metamaterials consisting of alternating layers of metal-vacuum and metal-dielectric interfaces prepared on different substrates will be discussed. Imaging and focusing applications of these metamaterials will be presented. Femtosecond plasmon-induced changes in the magnetic anisotropy of the iron garnet substrate will be presented. This effect is found to be similar to the previously reported photo-induced magnetic anisotropy in this material. However, its dependence on the polarization of the
light and orientation of the magnetization is found to be different and it's magnitude appears to be enhanced. This plasmonic control of the spins opens new interesting avenues for all-optical ultrafast control of the magnetization at a nanometer length scale.

Femtosecond micro- and nano-machining of materials for microfluidic applications (Paper Presentation)
Paper 7039-18 of Conference 7039
Authors(s): Yelena V. White, Matthew Parrish, Xiaoxuan Li, Lloyd Davis, William Hofmeister, Univ. of Tennessee Space Institute
Date: Wednesday, 13 August 2008

Modulating the optical response of thin-film structures by a nanoscale phase transition (Paper Presentation)
Paper 7041-17 of Conference 7041
Authors(s): Richard F. Haglund, Jr., Vanderbilt Univ.
Date: Thursday, 14 August 2008
Vanadium dioxide undergoes a reversible semiconductor-to-metal transition (SMT) near 70˚C, transforming the crystal structure from monoclinic to rutile. The SMT can be induced either thermally, or by band-to-band laser excitation on a femtosecond time scale. The hysteresis in the optical reflection or transmission associated with the SMT exhibits intensity-, size-, shape- and curvature-dependent effects that open the door to a variety of technological applications for nanostructured VO2. In composite nanostructures combining VO2 with noble metals, the change in the dielectric function effected by the SMT can be used to modulate the plasmonic response of noble-metal nanostructures on an ultrafast time scale.

Linear and nonlinear optical properties of highly transmissive one-dimensional metal-organic photonic bandgap structures (Paper Presentation)
Paper 7049-24 of Conference 7049
Authors(s): Canek Fuentes-Hernandez, Georgia Institute of Technology; Lazaro A. Padilha, College of Optics & Photonics/Univ. of Central Florida; Daniel Owens, Shuo-Yen Tseng, Georgia Institute of Technology; Scott Webster, College of Optics & Photonics/Univ. of Central Florida; Jian-Yang Cho, Georgia Institute of Technology; David J. Hagan, Eric W. VanStryland, College of Optics & Photonics/Univ. of Central Florida; Seth R. Marder, Bernard Kippelen, Georgia Institute of Technology
Date: Thursday, 14 August 2008
 

Related Del Mar Photonics products

Femtosecond Lasers - Reserve a spot in our femtosecond Ti:Sapphire training workshop during this summer in San Diego, California

Trestles femtosecond Ti:Sapphire laser
Trestles Finesse femtosecond Ti:Sapphire laser with integrated DPSS pump laser
Teahupoo Rider femtosecond amplified Ti:Sapphire laser
Mavericks femtosecond Cr:Forsterite laser
Tamarack femtosecond fiber laser (Er-doped fiber)
Buccaneer femtosecond OA fiber laser (Er-doped fiber) and SHG
Cannon Ultra-broadband light source
Tourmaline femtosecond Yt-doped fiber laser
Chata femtosecond Cr:ZnSe laser (2.5 micron) coming soon
Phonics West 2008: applications of femtosecond lasers

High Power Femtosecond Laser Systems - Reserve a spot in our femtosecond Ti:Sapphire training workshop during this summer in San Diego, California

Cortes 800 tabletop 40 TW Ti:Sapphire laser system
Cortes E  - High vacuum laser ablation/deposition system with 2 TW Ti:Sapphire laser
Cortes K - femtosecond seed laser for Petawatt KrF excimer laser
Cortes O 200TW femtosecond laser - KD*P CPOPA based amplifier system
Jaws femtosecond Cr:forsterite Multi-Terawatt Amplified Laser
High-vacuum system for laser ablation/deposition

Femtosecond pulse measurement instrumentation - Reserve a spot in our femtosecond Ti:Sapphire training workshop during this summer in San Diego, California

Reef scanning and single shot femtosecond autocorrelators
Avoca SPIDER - Spectral phase interferometry for direct electric-field reconstruction (SPIDER)
Rincon third order femtosecond cross-correlator (third order autocorrelator TOAC) also referred to as contrastmeter

Ultrafast Dynamics Research Tools  - Reserve a spot in our Ultrafast Dynamics Tools training workshop during this summer in San Diego, California

Beacon femtosecond fluorescence up-conversion (optical gating) spectrometer
Hatteras Ultrafast Transient Absorption Spectrometer

Femtosecond Systems and Accessories - Reserve a spot in our femtosecond Ti:Sapphire training workshop during this summer in San Diego, California

Femtosecond Micromachining
Femtosecond nanophotonics
Femtosecond NSOM
Pacifica femtosecond fiber laser based terahertz spectrometer
Pismo pulse picker (ultrafast electro-optical shutter)
Wavelength conversion: second and third harmonics generators for femtosecond lasers
Jibe white light continuum generator
Kirra Optical Faraday Rotators and Isolators

Laser accessories

Diffractive Variable Attenuator for high power lasers
Deformable mirrors - active elements for adaptive optics systems - Reserve a spot in our  Adaptive optics and wavefront sensors workshop in San Diego
ShaH - the family of fast, accurate and reliable wavefront sensors
Complete adaptive optics systems
Faraday rotators and isolators for high-power (up to 1kW) laser beams
SAM - Saturable Absorber Mirrors
PCA - Photoconductive antenna for terahertz applications
 

 

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