62 Works

Signal Enhancement in Disperse Solutions for the Analysis of Biomedical Samples by Photothermal Spectroscopy

Proskurnin, M.A.; Analytical Chemistry Division, Chemistry Department, Lomonosov Moscow State University, Moscow, 119991, Russia, Nedosekin, D.A.; Philips Classic Laser Laboratories, University Of Arkansas For Medical Sciences, Little Rock, Arkansas, 72205, USA, Ryndina, E.S.; Analytical Chemistry Division, Chemistry Department, Lomonosov Moscow State University, Moscow, 119991, Russia, Zharov, V.P.; Philips Classic Laser Laboratories, University Of Arkansas For Medical Sciences, Little Rock, Arkansas, 72205, USA & Volkov, D.S.; Analytical Chemistry Division, Chemistry Department, Lomonosov Moscow State University, Moscow, 119991, Russia
Photothermal lens spectrometry not only shows high sensitivity of colored heme protein determination, but also provides a change in the sensitivity compared to the theoretical values due to changes in the heat transfer in dispersed media. This can be used for estimating the size of disperse particles exemplified by hemoglobin cyanide, photothermal examination of the state of existence of hemoglobin in highly saline solutions by changes in photothermal properties upon dissociation of hemoglobin tetramers into...

THz and Raman Spectroscopy in Steroid Chemistry

Nazarov, M.M.; Institute On Laser And Information Technologies Of The RAS, Shatura, Russia, Smirnova, I.N.; Institute On Laser And Information Technologies Of The RAS, Shatura, Russia, Shkurinov, A.P.; Faculty Of Physics And International Laser Center M.V.Lomonosov Moscow State University, Leninskie Gory, GSP-1, Moscow, 119991, Russia & Cherkasova, O.P.; Institute Of Laser Physics SB RAS, Lavrentyeva 13/3, Novosibirsk, 630090, Russia
The terahertz time-domain and Raman spectra of steroids in the region of 0.1-3.5 THz have been measured. Steroids have several intense and specific absorption features in the THz frequency region. The features are uniquely determined by a hormone structure. This allows us to analyze steroids in complex samples such as pharmaceuticals, foodstuffs and biological fluids, and in process of the pharmacological and chemical synthesis.

Supercontinuum Generation over 2 µm

Kamynin, V.A.; General Physics Institute, Moscow, Russian Federation, 11933, Sadovnikova, Ya.E.; Moscow State University Of Instrument Engineering And Computer Science, Moscow, Russian Federation, 142200, Kurkov, A.S.; General Physics Institute, Moscow, Russian Federation, 11933 & Tsvetkov, V.B.; General Physics Institute, Moscow, Russian Federation, 11933
Effective supercontinuum generation in fiber mediain spectral range over 2 μm was experimentallydemonstrated. Supercontinuum generation wasobserved in passive optical fibers. Maximumspectral broadening was obtained in germaniumdopedfibers with longest wavelength near 2.7 μm.To provide high spectral density we used opticalfiber amplifiers. Thus supercontinuum generationwas obtained in holmium optical fiber amplifiersmedium with spectral density 10 W/nm, in therange from 2 to 2.5 μm. In thulium fiber amplifiersobserved amplification not only in conventionalrange near 1.8 μm, but in...

Multi-stage ytterbium fiber-amplifier seeded by a gain-switched laser diode

Burn, A.; Bern University Of Applied Sciences, ALPS, Pestalozzistrasse 20, CH-3400 Burgdorf, Switzerland, Romano, V.; Institute Of Applied Physics, University Of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland Bern University Of Applied Sciences, ALPS, Pestalozzistrasse 20, CH-3400 Burgdorf, Switzerland, Pilz, S.; Bern University Of Applied Sciences, ALPS, Pestalozzistrasse 20, CH-3400 Burgdorf, Switzerland & Ryser, M.; Institute Of Applied Physics, University Of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
We demonstrated all-fiber amplification of 11 ps pulses from a gain-switched laser diode at 1064 nm. The diode was driven at a repetition rate of 40 MHz and delivered 13 µW of fiber-coupled average output power. For the low output pulse energy of 325 fJ we have designed a multi-stage core pumped pre-amplifier in order to keep the contribution of undesired amplified spontaneous emission as low as possible. By using a novel time-domain approach for...

Nanostructure Formation on Solid Surfaces melted by Laser Pulse

Mikolutskiy, S.I.; Institute For Electrophysics And Electric Power RAS, 18, Dvorzovaya Nab., Sankt-Peterburg 191186, Russia, Urlichich, Yu.M.; Joint Stock Company "Russian Space Systems",53, Aviamotornaya St., Moscow 111250, Russia, Tokarev, V.N.; A.M. Prokhorov General Physics Institute RAS, 38, Vavilov St., Moscow 119991, Russia, Shmakov, V.A.; A.M. Prokhorov General Physics Institute RAS, 38, Vavilov St., Moscow 119991, Russia, Khomich, V.Yu.; Institute For Electrophysics And Electric Power RAS, 18, Dvorzovaya Nab., Sankt-Peterburg 191186, Russia & Yamschikov, V.A.; Institute For Electrophysics And Electric Power RAS, 18, Dvorzovaya Nab., Sankt-Peterburg 191186, Russia
The paper describes the model of nanostructureformation on solid surface by nanosecond laserpulses melting the material. Stefan problem withcorresponding boundary conditions is solved incombination with nucleation theory. It is found thattypical size of surface nanostructure formeddepends on energy and duration of laser pulse. Forcomparison of theoretic and experimental resultsvarious industry material (germanium, titanium,zirconia dioxide) pieces irradiated by ArF-laser areshown.

Broadband Superfluorescent Source Based on Bismuth-Doped GeO2-SiO2 Fiber

Riumkin, K.E.; Fiber Optics Research Center, Russian Academy Of Sciences, 38 Vavilov Str., Moscow 119333, Russia, Melkumov, M.A.; Fiber Optics Research Center, Russian Academy Of Sciences, 38 Vavilov Str., Moscow 119333, Russia, Shubin, A.V.; Fiber Optics Research Center, Russian Academy Of Sciences, 38 Vavilov Str., Moscow 119333, Russia, Dianov, E.M.; Fiber Optics Research Center, Russian Academy Of Sciences, 38 Vavilov Str., Moscow 119333, Russia, Bufetov, I.A.; Fiber Optics Research Center, Russian Academy Of Sciences, 38 Vavilov Str., Moscow 119333, Russia, Khopin, V.F.; Institute Of Chemistry Of High-Purity Substances, Russian Academy Of Sciences, 49 Tropinin Str., Nizhny Novgorod 603600, Russia, Firstov, S.V.; Fiber Optics Research Center, Russian Academy Of Sciences, 38 Vavilov Str., Moscow 119333, Russia & Gurianov, A.N.; Institute Of Chemistry Of High-Purity Substances, Russian Academy Of Sciences, 49 Tropinin Str., Nizhny Novgorod 603600, Russia
The first bismuth-doped superfluorescent fibersource operating at 1.44-μm was developed. Atpump power of 200 mW and pump wavelength of1310 nm, its output signal reaches 57 mW withspectrum width of 25 nm.

Self-Q-switched Cr,Nd:ReVO4 (Re=Gd, Y) crystal lasers

Zhang, H.; State Key Laboratory Of Crystal Materials And Institute Of Crystal Materials, Shandong University, 250100 Jinan, China & Yu, H.; State Key Laboratory Of Crystal Materials And Institute Of Crystal Materials, Shandong University, 250100 Jinan, China Max-Born-Institute For Nonlinear Optics And Short Pulse Spectroscopy, 2A Max-Born-Str., D-12489 Berlin, Germany
Self-Q-switched Cr,Nd:ReVO4 (Re=Gd, Y) crystallasers are demonstrated. The spectroscopic and self-Q-switched laser properties of Cr,Nd:ReVO4 arestudied. Polarized absorption spectra weremeasured at room temperature, which showed thatthe absorption bands display polarization characterand an absorption band of Cr5+ ions at 1110 nmenables the crystals to be self-Q-switched lasermaterials. The maximum pulse energy are achievedto be 1.12 μJ with Re=Gd , and the shortest pulsewidth is 85.8 ns with Re=Y. The results show thatCr,Nd:ReVO4 crystals are new potential...

Selective Ablation in Cu(In,Ga)Se2 thin-film solar cells – analysis of different process regimes at sub-picosecond to nanosecond pulse duration.

Muralt, M.; Bern University Of Applied Sciences, Pestalozzistrasse 20, CH-3400 Burgdorf, Nishiwaki, S.; Laboratory For Thin Films And Photovoltaics, EMPA, Swiss Federal Laboratories For Materials Science And Technology, Überlandstrasse 129, CH-8600 Dübendorf, Witte, R.; Solneva SA, Swiss Solar Tools, Alte Lyssstrasse 2, CH-3270 Aarberg, Frei, B.; Solneva SA, Swiss Solar Tools, Alte Lyssstrasse 2, CH-3270 Aarberg, Romano, V.; Bern University Of Applied Sciences, Pestalozzistrasse 20, CH-3400 Burgdorf, Burn, A.; Bern University Of Applied Sciences, Pestalozzistrasse 20, CH-3400 Burgdorf, +41 34 426 4141 & Buecheler, S.; Laboratory For Thin Films And Photovoltaics, EMPA, Swiss Federal Laboratories For Materials Science And Technology, Überlandstrasse 129, CH-8600 Dübendorf
Recent achievements in Cu(In,Ga)Se2 (CIGS) thin film technology allow the industrial production ofhighly efficient solar modules. A large growth of the CIGS-based solar cell production volume can beexpected for the coming years thanks to some favorable properties inherent to this absorber type. A majordrawback of CIGS is the inefficient patterning process. Since CIGS is a particularly difficult material forlaser ablation there is still no industrial all-laser scribing solution available. Manufacturers fall back onmechanical needle scribing...

Progress in real-time photoacoustic imaging using optical ultrasound detection

Paltauf, G.; Department Of Physics, Karl-Franzens-University, 8010 Graz, Austria & Nuster, R.; Department Of Physics, Karl-Franzens-University, 8010 Graz, Austria
Optical phase contrast full field detection in combination with a CCD-camera can be used to record acoustic fields. This allows to obtain two-dimensional photoacoustic projection images in real-time. The present work shows an extension of the technique towards full three-dimensional photoacoustic tomography. The reconstruction of the initial three dimensional pressure distribution is a two step process. First of all, projection images of the initial pressure distribution are acquired. This is done by back propagating the...

Laser Processing of CFRP

Graf, T.; Institut Für Strahlwerkzeuge, Universität Stuttgart, Pfaffenwaldring 43, D-70569 Stuttgart, Freitag, C.; Institut Für Strahlwerkzeuge, Universität Stuttgart, Pfaffenwaldring 43, D-70569 Stuttgart, Hafner, M.; Institut Für Strahlwerkzeuge, Universität Stuttgart, Pfaffenwaldring 43, D-70569 Stuttgart, Weber, R.; Institut Für Strahlwerkzeuge, Universität Stuttgart, Pfaffenwaldring 43, D-70569 Stuttgart & Onuseit, V.; Institut Für Strahlwerkzeuge, Universität Stuttgart, Pfaffenwaldring 43, D-70569 Stuttgart
The key issue for laser-processing of carbon fiberreinforced plastics (CFRP) is the thermal damage ofboth, the matrix material and the carbon fibres. Thispaper describes the basic mechanisms leading tosuch thermal damage and its implications on thedesign of appropriate laser processing systems.

Laser-induced chemical liquid-phase deposition of copper on transparent substrates

Von Arx, U.; Department Architecture, Wood And Civil Engineering, Bern University Of Applied Sciences, Solothurnstrasse 102, CH-2500 Biel, Switzerland, Schwaller, P.; Institute For Applied Laser, Photonics And Surface Technologies, Bern University Of Applied Sciences, Pestalozzistrasse 20, CH-3400 Burgdorf, Switzerland, Neuenschwander, B.; Institute For Applied Laser, Photonics And Surface Technologies, Bern University Of Applied Sciences, Pestalozzistrasse 20, CH-3400 Burgdorf, Switzerland & Zehnder, S.; Institute For Applied Laser, Photonics And Surface Technologies, Bern University Of Applied Sciences, Pestalozzistrasse 20, CH-3400 Burgdorf, Switzerland
Laser-induced chemical liquid phase deposition allows maskless manufacturing of metallic structures on the surface of dielectrics and is prospected to be a promising tool in the field of microelectronics and microfluidics. The aim of the work presented here is to combine this deposition method with a related micro-structuring method known as laser-induced backside wet etching. Fabricating both, microstructured surface structures and subsequent deposition of conducting patterns within the same setup would be an interesting tool...

All-Fiber Thulium-Doped Mode-Locked Lasers Based on the Nonlinear Amplifying Loop Mirror

Krylov, A.A.; Fiber Optics Research Center Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia, Dianov, E.M.; Fiber Optics Research Center Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia, Pozharov, A.S.; A.M. Prokhorov General Physics Institute Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia, Obraztsova, E.D.; A.M. Prokhorov General Physics Institute Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia, Kryukov, P.G.; Fiber Optics Research Center Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia, Arutyunyan, N.R.; A.M. Prokhorov General Physics Institute Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia & Chernysheva, M.A.; Fiber Optics Research Center Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia
We report on thulium-doped all-fiber lasers based on the nonlinear amplifying loop mirror and mode-locked by both a semiconductor saturable absorber (SESAM) and single-walled carbon nanotubes (SWCNT). An intracavity and external dispersion management was realized with the aid of a passive germanium-silicate fiber. SESAM mode-locked laser generates as short as 230-fs pulses with maximum average output power of 106 mW, corresponding to a 3.7 kW peak power and almost 2 nJ pulse energy. In contrast...

Laser Structuring of Glass-Carbon for Improvement of Its Emitting Properties

Chebotarevsky, Yu.V.; Gagarin Saratov State Technical University, 77, Polytechnicheskaya St., Saratov, 410054, Russia, Surmenko, E.L.; Gagarin Saratov State Technical University, 77, Polytechnicheskaya St., Saratov, 410054, Russia, Popov, I.A.; Gagarin Saratov State Technical University, 77, Polytechnicheskaya St., Saratov, 410054, Russia & Sokolova, T.N.; Gagarin Saratov State Technical University, 77, Polytechnicheskaya St., Saratov, 410054, Russia
Laser structuring as a stage of laser micromachining operations for a glass-carbon plate processing is described. The operations of laser scribing, milling, cleaning and marking were used for production of the field-emission multi-beam cathode preform. The operation of structuring was applied for production of micropeaks on the surface of the cathode beams. Two different approaches were tested for laser structuring of the cathode beams - linear scan and overlapping blind holes. The nanopeaks are self-organized...

Enhancement of the Raman Scattering and the Third-Harmonic Generation in Silicon Nanowires

Sivakov, V.A.; D.V. Skobeltsyn Nuclear Physics Institute, M.V. Lomonosov Moscow State University, Moscow, 199991, Russia, Osminkina, L.A.; Physics Department, M.V. Lomonosov Moscow State University, Moscow, 199991, Russia, Marshov, V.S.; Physics Department, M.V. Lomonosov Moscow State University, Moscow, 199991, Russia, Bunkov, K.V.; Physics Department, M.V. Lomonosov Moscow State University, Moscow, 199991, Russia, Petrov, D.V.; D.V. Skobeltsyn Nuclear Physics Institute, M.V. Lomonosov Moscow State University, Moscow, 199991, Russia, Gonchar, K.A.; Physics Department, M.V. Lomonosov Moscow State University, Moscow, 199991, Russia, Golovan, L.A.; Physics Department, M.V. Lomonosov Moscow State University, Moscow, 199991, Russia NRC ‘Kurchatov Institute’, Moscow, 123182, Russia, Kulmas, M.N.; Institut Für Photonische Technologien, Jena, D-07745, Germany & Timoshenko, V.Yu.; Physics Department, M.V. Lomonosov Moscow State University, Moscow, 199991, Russia
We studied features of Raman scattering and the third-harmonic generation in silicon nanowire (SiNW) ensembles formed by means of chemical etching of crystalline silicon (c-Si) wafers with preliminary deposited silver nanoparticles in hydrofluoric acid. The c-Si wafers of different crystallographic orientations and doping levels were used, which results in variations of the formed nanostructure size and degree of order. For the excitation at 1064 nm the ratio of Raman scattering signals for SiNWs and those...

Fluorescent properties of the kindling fluorescent protein (KFP) at acidic pH values

Nemukhin, A.V.; M.V. Lomonosov Moscow State University, Department Of Chemistry, 119991, Moscow, Russia, Goryashchenko, A.S.; A.N. Bach Institute Of Biochemistry, Moscow, 119071, Russia, Mironov, V.A.; M.V. Lomonosov Moscow State University, Department Of Chemistry, 119991, Moscow, Russia, Savitsky, A.P.; A.N. Bach Institute Of Biochemistry, Moscow, 119071, Russia & Rusanov, A.L.; A.N. Bach Institute Of Biochemistry, Moscow, 119071, Russia
Kindling fluorescent protein (KFP) is the photoswitchable protein which can be used in high-resolution microscopy and as a quencher in FRET-sensors. Fluorescent properties of KFP depend on pH value. In this paper we investigate the influence of pH on the spectral properties and kindling/quenching ability of KFP in the acidic pH region.Shift to the acidic region leads to the increase of fluorescence intensity of KFP over time. The excitation spectrum has a new peak near...

UV Picosecond-Laser Induced Bulk Modifications and Luminescence in Single-Crystal Diamond

I.I. Vlasov, Khomich, A.A.; Natural Sciences Center, Prokhorov General Physics Institute, Moscow 119991, Russia, Pimenov, S.M.; Natural Sciences Center, Prokhorov General Physics Institute, Moscow 119991, Russia, Zavedeev, E.V.; Natural Sciences Center, Prokhorov General Physics Institute, Moscow 119991, Russia, Jäggi, B.; Bern University Of Applied Sciences, Engineering & Information Technology, Burgdorf CH-3400, Switzerland, Neuenschwander, B.; Bern University Of Applied Sciences, Engineering & Information Technology, Burgdorf CH-3400, Switzerland & Romano, V.; Bern University Of Applied Sciences, Engineering & Information Technology, Burgdorf CH-3400, Switzerland
Bulk laser-graphitized microstructures have been fabricated in type IIa single-crystal 1.2-mm-thick diamond plates by UV laser irradiation with 10-ps pulses at λ=355 nm wavelength. It is found that the crystallographic-plane-dependent character of structural modifications in the bulk is influenced by the laser wavelength and the direction of the laser beam incidence relative to a given crystallographic direction (<100> or <110>) in the diamond plates. High-order Stokes Raman lasing is observed during UV laser irradiation and...

Influence of Submillisecond Er-Laser Pulses on Mechanical Properties of Hard Tooth Tissues

Belikov, A.V.; Saint-Petersburg National Research University Of Information Technologies, Mechanics And Optics, Saint-Petersburg, 197101, Russia, Skrypnik, A.V.; Saint-Petersburg National Research University Of Information Technologies, Mechanics And Optics, Saint-Petersburg, 197101, Russia & Shatilova, K.V.; Saint-Petersburg National Research University Of Information Technologies, Mechanics And Optics, Saint-Petersburg, 197101, Russia
In this paper the influence of pulse duration, pulse repetition rate, pulse number (at single point), and pulse energy of YLF: Er laser radiation with λ=2.84 μm on mechanical properties of human hard tooth tissues was studied. It was found that the multi-pulses action of this laser radiation with pulse energy below hard tooth tissues ablation threshold promotes increase in the microhardness of enamel at 25% and microhardness of dentine at 35%. Such research can...

Observation of Thermocapillary Effect in Gas -Assisted CO2 Laser Cutting of Steel

Dubrov, A.V.; Institute On Laser And Information Technology Of Russia Academy Of Science -ILIT RAS 1 Svyatoozerskaya St., Shatura, Moscow Region, 140700 Russia, Zavalov, Y.N.; Institute On Laser And Information Technology Of Russia Academy Of Science -ILIT RAS 1 Svyatoozerskaya St., Shatura, Moscow Region, 140700 Russia & Dubrov, V.D.; Institute On Laser And Information Technology Of Russia Academy Of Science -ILIT RAS 1 Svyatoozerskaya St., Shatura, Moscow Region, 140700 Russia
Investigations of melt’s dynamics have been performed with pyrometer in the gasjet-assisted CO2 laser cutting. Pyrometer consists of 4 sensors and local luminosity of metal melt has been measured precisely on different depth along front of cutting with long dimension resolution about 0.1 mm and with time resolution as short as 0.06 ms. The results of data processing of brightness temperature are reported for laser cutting of mild-steel plate 3 mm, 6 mm and 10...

Modeling of non-equilibrium effects in silicon irradiated by pulsed laser

Mazhukin, A.; Keldysh Institute Of Applied Mathematics Of RAS, Moscow, Miusskaya Sq.4, Russia
In this paper, we use the methods of mathematical modeling to investigate the action of laser pulse (picosecond) with a wave length of λL=0.53μm and the photon energy exceeding the band gap of silicon ħω>Eg on silicon target. The main feature of these regimes of laser irradiation is strong non-equilibrium of heating and melting processes, which is manifested in a large temperature difference between the carriers and the lattice.

Mechanism of femtosecond laser nano-ablation for metals

Miyasaka, Y.; Institute For Chemical Research, Kyoto University, Gokasho, Uji, 611-0011, Japan Department Of Physics, Kyoto University, Kitashirakawa, Sakyo, 606-7501, Japan, Sakagami, H.; Department Of Physics, Nagoya University, Nagoya, Aichi, 464-8602, Japan National Institute For Fusion Science, Toki-City, Gifu, 509-5292, Japan, Sakabe, S.; Institute For Chemical Research, Kyoto University, Gokasho, Uji, 611-0011, Japan Department Of Physics, Kyoto University, Kitashirakawa, Sakyo, 606-7501, Japan, Hashida, M.; Institute For Chemical Research, Kyoto University, Gokasho, Uji, 611-0011, Japan Department Of Physics, Kyoto University, Kitashirakawa, Sakyo, 606-7501, Japan, Tokita, S.; Institute For Chemical Research, Kyoto University, Gokasho, Uji, 611-0011, Japan Department Of Physics, Kyoto University, Kitashirakawa, Sakyo, 606-7501, Japan, Shimizu, M.; Institute For Chemical Research, Kyoto University, Gokasho, Uji, 611-0011, Japan Department Of Physics, Kyoto University, Kitashirakawa, Sakyo, 606-7501, Japan & Ogata, T.; Department Of Physics, Nagoya University, Nagoya, Aichi, 464-8602, Japan
Metals have three ablation threshold fluences (high,middle and low-threshold fluence, here called) forfemtosecond laser pulses. In order to investigatethe physics of metal ablation under an intenseoptical field, the ions emitted from a laserirradiatedcopper surface were studied by time-offlightenergy spectroscopy. The low laser fluenceat which ions are emitted, Fth,L is 0.028 J/cm2, andtwo higher emission thresholds were identified atfluences of Fth,M =0.195 J/cm2 and Fth,H =0.470J/cm2. The relation between the number of emittedions per pulse Ni...

The resonance fluorescence spectra of N two-level quantum systems located around the spherical nanoantenna

Pastukhov, V.M.; International Laser Center And Faculty Of Physics, M.V. Lomonosov Moscow State University, Moscow 119991, Russia, Zadkov, V.N.; International Laser Center And Faculty Of Physics, M.V. Lomonosov Moscow State University, Moscow 119991, Russia, Vladimirova, Yu.V.; International Laser Center And Faculty Of Physics, M.V. Lomonosov Moscow State University, Moscow 119991, Russia & Klimov, V.V.; P.N. Lebedev Physical Institute, Russian Academy Of Sciences, Leninsky Ave. 53, 119991 Moscow, Russia
Modification of the resonance fluorescence spec-trum of a two-level atom driving by a lasermonochromatic field in the close proximity of aplasmonic nanostructure (metal sphere) is studiedin detail. It is shown that one can control thisspectrum varying four key parameters: distancebetween the atom and the nanosphere, atom’s lo-cation around the nanosphere, the radius of thenanosphere, and polarization of the incident ra-diation. These parameters affect the local fieldenchancement, transition frequency shift and themodification of the radiative decay...

Pulse Laser Deposition method for UV-Photocathode production

Denisov, N.N.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 119991, Moscow, Vavilov Str., 38, Trutnev, U.A.; FSUE RFNC-VNIIEF, 607188, Sarov, Nizhny Novgorod Region, Mira Ave, 37, Bukin, V.V.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 119991, Moscow, Vavilov Str., 38, Garanin, S.G.; FSUE RFNC-VNIIEF, 607188, Sarov, Nizhny Novgorod Region, Mira Ave, 37, Terehin, V.A.; FSUE RFNC-VNIIEF, 607188, Sarov, Nizhny Novgorod Region, Mira Ave, 37, Garnov, S.V.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 119991, Moscow, Vavilov Str., 38, Brendel, V.M.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 119991, Moscow, Vavilov Str., 38 & Bagdasarov, V.Ch.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 119991, Moscow, Vavilov Str., 38
Production method of alkali halides UVphotocathodes durable to environment exposure was proposed. Photocathodes with highhomogeneous and adhesion photoemission layerwere made. Quantum yield measurements results ofmanufactured photocathodes are presented.Developed method is promising for creation of highaperture electron injectors and detectors.

Photoacoustic section imaging with integrating detectors

Gratt, S.; Department Of Physics, Karl-Franzens-Universitaet Graz, Universitaetsplatz 5, Graz, 8010, Austria, Nuster, R.; Department Of Physics, Karl-Franzens-Universitaet Graz, Universitaetsplatz 5, Graz, 8010, Austria & Paltauf, G.; Department Of Physics, Karl-Franzens-Universitaet Graz, Universitaetsplatz 5, Graz, 8010, Austria
Photoacoustic section imaging is a method for visualizing structures with optical contrast in selected layers of an extended object. In order to avoid resolution limitations that are due to commonly used ultrasound detectors of finite size, we propose the use of extended, integrating cylindrical elements for focusing the acoustic detection into the selected section. Two imaging methods based on piezoelectric and optical detection are presented. Resolution limits and results on zebra fish are demonstrated.

Growth peculiarities and non-linear properties of profiled doped strontium-barium niobate crystals

Zverev, P.G.; A.M. Prokhorov General Physics Institute RAS, 38, Vavilov Str., Moscow, 119991, Russia, Lykov, P.A.; A.M. Prokhorov General Physics Institute RAS, 38, Vavilov Str., Moscow, 119991, Russia, Dunaeva, E.E.; A.M. Prokhorov General Physics Institute RAS, 38, Vavilov Str., Moscow, 119991, Russia, Ivleva, L.I.; A.M. Prokhorov General Physics Institute RAS, 38, Vavilov Str., Moscow, 119991, Russia & Osiko, V.V.; A.M. Prokhorov General Physics Institute RAS, 38, Vavilov Str., Moscow, 119991, Russia
The nominally pure and doped with Ce, Cr, Co strontium-barium niobate crystals of SBN:61 were grown by modified Stepanov technique. The specific features of the technique were studied and growth conditions for obtaining the high homogeneous SBN crystals in bulk-profiled configuration were optimized. The photorefractive and non-linear properties of SBN pure and doped with Ce, Cr and Co were investigated. It was shown that SBN:Ce crystal is an excellent medium for high efficiency holographic information...

20th International Conference on Advanced Laser Technologies ALT’12: Conference Program

Beat Neuenschwander & Romano, Valerio; University Of Bern
The ALT Conference series are focused on the recent achievements and advances in laser technology and laser applications in various areas. These series of conferences, held annually since 1993, were established by Nobel Prize laureate Alexander Prokhorov, director of the General Physics Institute of the Russian Academy of Sciences. Previous conferences were organized in Russia, Czech Republic, Germany, Greece, France, Italy, Romania, Switzerland, United Kingdom, China, Hungary, Finland, Turkey, The Netherlands and Bulgaria. The key...

Registration Year

  • 2013
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