Dr. Alexander I. Plekhanov Profile

Dr. Alexander I. Plekhanov

Head of Lab at Institute of Automation and Electrometry SB of RAS

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Publications (16)

Proceedings Article | 31 July 2007 Paper

Single-crystal opal films and heterostructures

D. Kalinin, V. Serdobitseva

Proceedings Volume 6728, 67280K (2007) https://doi.org/10.1117/12.752176

KEYWORDS: Photonic crystals, Crystals, Heterojunctions, Reflection, Particles, Optical spheres, Silica, Dispersion, Nanocrystals, Scanning electron microscopy

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Proceedings Article | 19 July 2007 Paper

Explosive evaporation of Rb or K clusters by low-power laser radiation in the presence of excited atoms

Anatoly Shalagin, Sergey Atutov, Roberto Calabrese, Luca Tomassetti, Vincenzo Guidi

Proceedings Volume 6726, 67260D (2007) https://doi.org/10.1117/12.750139

KEYWORDS: Clouds, Chemical species, Rubidium, Potassium, Explosives, Metals, Luminescence, Fractal analysis, Particles, Absorption

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Proceedings Article | 10 April 2007 Paper

Diffractive gradient mirror for the formation of YAG:Nd laser one-mode radiation

A. Kuchyanov, A. Plekhanov, A. Poleshchyk, V. Cherkashin

Proceedings Volume 6613, 661304 (2007) https://doi.org/10.1117/12.739307

KEYWORDS: Mirrors, Diffractive optical elements, Laser damage threshold, Laser resonators, Diffraction, Laser optics, Space mirrors, Optical filters, Fused quartz, Dielectrics

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Proceedings Article | 10 June 2006 Paper

Chirped frequency-shifted light pulses from a photonic-crystal fiber for pump-probe nonlinear absorption spectroscopy of molecular aggregates

A. Ivanov, D. Akimov, P. Mezentsev, A. Plekhanov, M. Alfimov, A. Zheltikov

Proceedings Volume 6344, 634413 (2006) https://doi.org/10.1117/12.694284

KEYWORDS: Molecular aggregates, Absorption, Chromium, Spectroscopy, Absorption spectroscopy, Molecules, Photonic crystal fibers, Optical fibers, Excitons, Femtosecond phenomena

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Proceedings Article | 7 April 2004 Paper

Thin film of J-aggregates a saturable absorber for passive mode locking in a YAG:Nd3+ laser

Alexander Plekhanov, Aleksandr Kuch'yanov, Roman Markov, A. Simanchuk, V. Avdeeva, Boris Shapiro, Yu. Solomisky, Alexey Tolmachev

Proceedings Volume 5478, (2004) https://doi.org/10.1117/12.560946

KEYWORDS: Thin films, Mode locking, Picosecond phenomena

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Proceedings Article | 29 July 2002 Paper

Optical limiting mechanisms in fullerene-containing Pi-conjugated organic materials: polyimide and COANP

Natalia Kamanina, Alexander Plekhanov

Proceedings Volume 4900, (2002) https://doi.org/10.1117/12.484613

KEYWORDS: Absorption, Fullerenes, Molecules, Medium wave, Visible radiation, Thin films, Optical limiting, Organic materials, Saturable absorption, Doping

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Proceedings Article | 24 July 2002 Paper

Observation of optical nonlinearity size enhancement in one-dimensional molecular aggregates

Roman Markov, Alexander Plekhanov, Vladimir Shelkovnikov

Proceedings Volume 4751, (2002) https://doi.org/10.1117/12.475919

KEYWORDS: Absorption, Molecular aggregates, Excitons, Molecules, Nonlinear optics, Photonic integrated circuits, Thin films, Optical properties, Molecular interactions, Ions

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Proceedings Article | 29 May 2002 Paper

Population inversion in two-level system under continuous optical excitation

Roman Markov, Alexander Plekhanov, A. Shalagin

Proceedings Volume 4748, (2002) https://doi.org/10.1117/12.468934

KEYWORDS: Sodium, Particles, Chemical species, Absorption, Helium, Chemical elements, Luminescence, Polarization, Beam splitters, Monochromators

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Proceedings Article | 29 November 2000 Paper

Optical properties of thin solid films of J-aggregated dyes with long alkyl substituents

Alexander Plekhanov, Roman Markov, Sergei Rautian, Natalja Orlova, Vladimir Shelkovnikov

Proceedings Volume 4086, (2000) https://doi.org/10.1117/12.408367

KEYWORDS: Thin films, Solids, Absorption, Molecules, Optical properties, Molecular aggregates, Photonic integrated circuits, Atomic force microscopy, Absorbance, Polymers

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Proceedings Article | 15 March 1999 Paper

Nonlinear optical properties of cyanine dye J-aggregates in thin films measured by Z-scan technique

Roman Markov, Alexander Plekhanov, Sergei Rautian, Zoya Ivanova, Natalja Orlova, Vladimir Shelkovnikov

Proceedings Volume 3734, (1999) https://doi.org/10.1117/12.342359

KEYWORDS: Absorption, Thin films, Photonic integrated circuits, Solids, Information operations, Excitons, Nonlinear optics, Data modeling, Picosecond phenomena, Polymers

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Proceedings Article | 21 October 1998 Paper

Dispersion of the real and imaginary parts of cubic susceptibility in submicron films of pseudoisocyanine J aggregates

Alexander Plekhanov, Sergei Rautian, Vladimir Safonov, Pavel Chubakov, Natalja Orlova, Vladimir Shelkovnikov

Proceedings Volume 3485, (1998) https://doi.org/10.1117/12.328262

KEYWORDS: Absorption, Photonic integrated circuits, Information operations, Excitons, Refraction, Nonlinear optics, Data modeling, Thin films, Absorbance, Thermography

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Proceedings Article | 16 October 1998 Paper

Third-order nonlinearity optical properties of the films of cyanine dye with borate anion

Alexander Plekhanov, Roman Markov, Sergei Rautian, Natalja Orlova, Vladimir Shelkovnikov, Vladimir Volkov

Proceedings Volume 3473, (1998) https://doi.org/10.1117/12.328187

KEYWORDS: Photonic integrated circuits, Absorption, Molecular aggregates, Molecules, Nonlinear optics, Thin films, Refraction, Optical properties, Nonlinear response, Crystals

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Proceedings Article | 25 August 1998 Paper

Dynamics of hologram pulse recording in polymer films with high optical attenuation

Eugene Kovalenko, Sergey Sharangovich, Vladimir Shelkovnikov, Alexander Plekhanov, Eugene Pen

Proceedings Volume 3388, (1998) https://doi.org/10.1117/12.319429

KEYWORDS: Holography, Diffusion, Holograms, Polymers, Polymerization, Signal attenuation, Diffraction gratings, Photopolymers, Pulsed laser operation, Helium neon lasers

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Proceedings Article | 1 January 1998 Paper

Dynamics of holographic diffraction grating formation in pilot photopolymer materials during pulse recording

Vladimir Shelkovnikov, Alexander Plekhanov, Eugene Pen, Sergey Sharangovich

Proceedings Volume 3347, (1998) https://doi.org/10.1117/12.301425

KEYWORDS: Polymers, Polymerization, Holograms, Diffraction gratings, Pulsed laser operation, Holography, Photopolymers, Helium neon lasers, Magnesium, Dysprosium

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The investigations of hologram recording on a basis of photochemical polymerization reaction in polymer films have lead to creation the number of new holographic materials13. It is expected that their application will be realized in the nearest future. The performances of holographic recording useful for practice, such as sensitivity, maximum of diffraction efficiency (DE), storage, spatial resolution and other have been investigated in detail for this films4'5. But the question of mechanism of hologram formation, including the description of kinetic of photochemical and chemical stages of hologram recording is keeping open and discussed5'6. The holographic performances of HPPM-633 which consist of the light absorbing dye (Methylene Blue), initiator (triethanolamine - TEA), monomer (acrylamide -M), cross-linking monomer (hexamethylenbisacrylamide) and polymer binder (polyvinylalcohol) at He-Ne laser continuous recording were described7'8. In the preliminary investigation of hologram recording in HPPM-633 by the He-Ne laser pulses it was established that the DE about 1-5% appear at exposition time 0, 1 s with laser beam power density 0,05-0,1 W/cm2. The Fig. 1 illustrates the pulse hologram growth curves in HPPM633 , The phenomenon of hologram dark amplification (see Fig.2a,b) was observed in this experiment , That fact is in accordance with the mechanism of free-radical polymerization in HPPM. In this case the monomer polymerization in plasticizered polymer may expand independently after initial laser pulse action. It is interesting to know in which way the polymerization accrues at earlier stages. But the employment of pulse setup on the base of He-Ne laser does not allow to investigate the dark processes at time less then 0. 1 sec. To elucidate the material behaviour at the initial stages of the polymerization process immediately after excitation of the absorbing dye to the triplet state it is necessary to record the diffraction grating by laser pulse with durability about 108 sec. The DE growth of hologram under these conditions fall into nonsteady-state case of the polymerization. Thus we must to connect the hologram DE temporal dependence (DE(t)) with kinetic model of polymerization reactions in nonsteady-state case to have a possibility of the chemical interpretation of the obtained experimental date.

Proceedings Article | 1 January 1998 Paper

Nonlinear optical properties of two types of PIC J-aggregates in thin films

Roman Markov, Alexander Plekhanov, Sergei Rautian, Natalja Orlova, Vladimir Shelkovnikov, Vladimir Volkov

Proceedings Volume 3347, (1998) https://doi.org/10.1117/12.301407

KEYWORDS: Absorption, Photonic integrated circuits, Thin films, Excitons, Refraction, Data modeling, Information operations, Solids, Molecules, Polymer thin films

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Proceedings Article | 10 June 1996 Paper

Cubic susceptibility of thin films of pseudoisocyanine J-aggregates

Fedor Zhuravlev, Natalja Orlova, Alexander Plekhanov, Sergei Rautian, Vladimir Safonov, Pavel Chubakov, V. Shelkovnikov

Proceedings Volume 2801, (1996) https://doi.org/10.1117/12.242129

KEYWORDS: Absorption, Thin films, Signal detection, Four wave mixing, Refraction, Excitons, Information operations, Photonic integrated circuits, Dye lasers, Light scattering

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Showing 5 of 16 publications

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