Dr. Alexander Anatolyevich Zemlyanov Profile

KEYWORDS: Luminescence, Femtosecond phenomena, Fluorescence spectroscopy, Mirrors, LIDAR, Rhodamine, Deformable mirrors, Telescopes, Atmospheric optics, Pulsed laser operation

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Proceedings Article | 8 December 2022 Paper

Effect of the topological charge of a vortex light beam of a high-power femtosecond radiation on the statistical characteristics of the filamentation domain geometry in the turbulent atmosphere

A. Zemlyanov, A. Buligin

Proceedings Volume 12341, 123411Q (2022) https://doi.org/10.1117/12.2646090

KEYWORDS: Femtosecond phenomena, Atmospheric propagation, Turbulence, Genetic algorithms, Systems modeling, Numerical analysis, Atmospheric optics, Statistical analysis, High power lasers, Geometrical optics

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Proceedings Article | 8 December 2022 Paper

Numerical simulations of self-channeling and filamentation of spatially pre-modulated high-power femtosecond laser pulse in air

Yu. Geints, A. Zemlyanov, O. Minina

Proceedings Volume 12341, 123410C (2022) https://doi.org/10.1117/12.2644367

KEYWORDS: Femtosecond phenomena, High power lasers, Modulation, Plasma, Numerical simulations, Wave propagation, Ionization

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Proceedings Article | 8 December 2022 Paper

Acoustic signals from water aerosol with nanoparticles during filamentation of a femtosecond pulse

S. Golik, V. Donchenko, A. Zemlyanov, Al. Zemlyanov, A. Yu. Major, R. Ryambov, A. Trifonov

Proceedings Volume 12341, 1234115 (2022) https://doi.org/10.1117/12.2644922

KEYWORDS: Aerosols, Femtosecond phenomena, Acoustics, Nanoparticles, Atmospheric particles, Atmospheric propagation, Atmospheric optics, Plasma, Laser energy, Pulsed laser operation

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Proceedings Article | 8 December 2022 Paper

Using the nonlinear layer model for estimation of characteristics of high-power ultrashort laser pulse beams propagating along an aerospace path

A. Zemlyanov, O. Minina

Proceedings Volume 12341, 1234109 (2022) https://doi.org/10.1117/12.2643896

KEYWORDS: Atmospheric propagation, High power lasers, Atmospheric optics, Ultrafast phenomena, Aerospace engineering, Diffraction, Nonlinear optics, Laser beam propagation

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Proceedings Article | 8 December 2022 Paper

Regularities of propagation of amplitude-modulated high-power femtosecond laser radiation in the air

D. Apeksimov, P. Babushkin, Yu. Geints, A. Zemlyanov, G. Matvienko, V. Oshlakov, A. Petrov, E. Khoroshaeva

Proceedings Volume 12341, 1234111 (2022) https://doi.org/10.1117/12.2644911

KEYWORDS: Atmospheric propagation, High power lasers, Femtosecond phenomena, Modulation, Laser energy, Laser beam propagation, Beam controllers, Amplitude modulation, Mirrors

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Proceedings Article | 8 December 2022 Paper

The influence of turbulence on propagation of femtosecond laser pulses along 100-m path

D. Apeksimov, P. Babushkin, A. Zemlyanov, A. Kabanov, D. Kochetov, V. Oshlakov, A. Petrov, E. Khoroshaeva

Proceedings Volume 12341, 1234112 (2022) https://doi.org/10.1117/12.2644912

KEYWORDS: Turbulence, Femtosecond phenomena, Mirrors, Deformable mirrors, Atmospheric optics, Remote sensing, Pulsed laser operation, Plasma

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Proceedings Article | 16 December 2021 Paper

Energy characteristics of resonator-free generation in nanodisperse active media under irradiation by nano- and femtosecond laser pulses

P. Babushkin, A. Burnashov, V. Donchenko, Al. Zemlyanov, V. Oshlakov, R. Ryambov, A. Trifonova

Proceedings Volume 11916, 119160V (2021) https://doi.org/10.1117/12.2603021

KEYWORDS: Femtosecond phenomena, Nanoparticles, Zinc oxide, Laser damage threshold, Stochastic processes, Photomultipliers, Oscilloscopes, Monochromators, Luminescence, Laser scattering

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Proceedings Article | 16 December 2021 Paper

Experimental studies of the response of liquid with fluorophore microparticles in interaction with femtosecond laser radiation

D. Apeksimov, P. Babushkin, A. Zemlyanov, G. Matvienko, A. Petrov, V. Oshlakov

Proceedings Volume 11916, 119161C (2021) https://doi.org/10.1117/12.2603368

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Proceedings Article | 16 December 2021 Paper

Interpretation of experimental data on multiple filamentation of high-power femtosecond laser pulses in air based on the diffraction-ray model of single filamentation

A. Zemlyanov, O. Minina

Proceedings Volume 11916, 119160P (2021) https://doi.org/10.1117/12.2602330

KEYWORDS: Femtosecond phenomena, High power lasers, Numerical simulations, Atmospheric optics, Laser beam propagation, Atmospheric propagation

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Proceedings Article | 16 December 2021 Paper

Analysis of the main processes during the propagation of high-power femtosecond laser pulses on the basis of the diffraction-ray tube method

A. Zemlyanov, O. Minina

Proceedings Volume 11916, 119160O (2021) https://doi.org/10.1117/12.2602325

KEYWORDS: Femtosecond phenomena, High power lasers, Atmospheric propagation, Dispersion, Diffraction, Plasma, Light wave propagation, Absorption

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Proceedings Article | 2 December 2021 Paper

Specifics of multiple filamentation formation for femtosecond laser radiation with topological charge

A. Bulygin, A. Zemlyanov

Proceedings Volume 12086, 120860N (2021) https://doi.org/10.1117/12.2602421

KEYWORDS: Atmospheric propagation, Femtosecond phenomena, Modeling, Beam propagation method, Atmospheric modeling, Turbulence, Systems modeling, Nonlinear optics, Laser beam propagation, High power lasers

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Proceedings Article | 2 December 2021 Paper

Femtosecond filamentation dynamics of synthesized coronary profile laser beam in air: numerical simulations

Yury Geints, Alexander Zemlyanov

Proceedings Volume 12086, 120860I (2021) https://doi.org/10.1117/12.2601461

KEYWORDS: Diffraction, Beam propagation method, Wave propagation, Geometrical optics, Nonlinear optics, Laser beam propagation, Atmospheric optics, Seaborgium, Numerical simulations, Femtosecond phenomena

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Proceedings Article | 2 December 2021 Paper

High-intensity light channels formed during the propagation of high-power femtosecond laser radiation in air

D. Apeksimov, Yu. Geints, A. Zemlyanov, A. Iglakova, G. Matvienko, O. Minina, V. Oshlakov, A. Petrov

Proceedings Volume 12086, 120861Z (2021) https://doi.org/10.1117/12.2601905

KEYWORDS: Femtosecond phenomena, Atmospheric propagation, Laser beam propagation, Pulsed laser operation, Numerical simulations, High power lasers, Atmospheric optics, Plasma

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Proceedings Article | 2 December 2021 Paper

Channeling of femtosecond laser pulses in the turbulent atmosphere

A. Zemlyanov, O. Minina

Proceedings Volume 12086, 1208620 (2021) https://doi.org/10.1117/12.2601906

KEYWORDS: Atmospheric propagation, Turbulence, Atmospheric optics, Femtosecond phenomena, Laser beam propagation, Atmospheric modeling, High power lasers, Diffraction, Atmospheric sciences

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Proceedings Article | 12 November 2020 Paper

Effective dispersion length during the propagation of powerful femtosecond laser pulses in the air

Yu. Geints, A. Zemlyanov, O. Minina

Proceedings Volume 11560, 115600S (2020) https://doi.org/10.1117/12.2574443

KEYWORDS: Dispersion, Femtosecond phenomena, Atmospheric propagation, Diffraction, Numerical analysis, Light wave propagation

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Proceedings Article | 12 November 2020 Paper

Numerical investigation of laser light scattering by dielectric microtoroids

Yury Geints, Ekaterina Panina, Alexander Zemlyanov, Inna Apeximova

Proceedings Volume 11560, 115600P (2020) https://doi.org/10.1117/12.2572642

KEYWORDS: Particles, Near field optics, Dielectrics, Light scattering, Scattering, Photonic nanostructures, Silicon, Glasses, Near field

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Proceedings Article | 12 November 2020 Paper

Characteristics of the energy-replenishing diffraction-ray tube at the postfilamentation stage of the propagation of femtosecond laser pulses in the air

Yu. Geints, A. Zemlyanov, O. Minina

Proceedings Volume 11560, 115600T (2020) https://doi.org/10.1117/12.2574444

KEYWORDS: Femtosecond phenomena, Atmospheric propagation, Chromium, Pulsed laser operation, Diffraction, Laser beam propagation, Gaussian beams, Atmospheric optics, Numerical simulations, Wave propagation

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Proceedings Article | 20 September 2020 Presentation + Paper

Filaments and post-filaments formation during high-power Ti:sapphire laser pulses propagation in air and optical glasses

Yuri Geints, Andrey Ionin, Daria Mokrousova, Georgy Rizaev, Leonid Seleznev, Elena Sunchugasheva, Alexander Zemlyanov

Proceedings Volume 11539, 115390H (2020) https://doi.org/10.1117/12.2566799

KEYWORDS: Glasses, Laser beam propagation, High power lasers, Ultrafast phenomena, Phase modulation, Nonlinear optics, Solids, Dielectrics, Pulsed laser operation, Laser energy

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Proceedings Article | 1 April 2020 Presentation + Paper

Tailoring light absorption of plasmonic-doped spherical dielectric microcapsule

Yury Geints, Ekaterina Panina, Alexander Zemlyanov

Proceedings Volume 11368, 113680E (2020) https://doi.org/10.1117/12.2551580

KEYWORDS: Absorption, Nanoparticles, Gold, Spherical lenses, Particles, Optical spheres, Metals, Plasmons, Nanorods, Finite-difference time-domain method

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We report the study of light absorption efficiency of a hollow spherical microparticle (microcapsule) doped with strongly absorbing gold nanoparticles of spherical and cylindrical spatial shapes. By means of the FDTD numerical simulations, the absorption spectra of a doped microcapsule in the visible and near-IR spectral regions (from 0.5 μm to 0.9 μm) are calculated. Based on the research results we can draw the several conclusions. First, the absorption efficiency of initially transparent spherical microcapsule is effectively tailored by doping the necessary amount of strongly absorbing nanometersized metal (gold) particles. Meanwhile, with a rather low volume fraction of nano-inclusions in the capsule shell (~ 18%) it is possible to rise its absorption cross-section to the value of an absolutely absorbing sphere. Next, the spectral absorption of a microcapsule turns out to be quite non-uniform in the considered wavelength range of incident radiation and depends on the morphology of nano-inclusions. In some spectral regions, substantial capsule absorption enhancement is realized due to the resonant excitation of surface plasmons in nanoparticles (from 540 nm to 570 nm for spheres, from 670 nm to 770 nm for rods of various form factors). In the long-wavelength wing of the spectrum, the efficiency of absorption of a nanoparticle-doped capsule as a rule decreases due to its Mie-parameter decrease and a drop in the absorption coefficient of bulk gold. The chromatic dispersion of microcapsule absorption decreases with the increasing of volume content of plasmonic nanoparticles. By simultaneous combining gold nanoparticles of various shapes (spheres and rods), it is possible to obtain a quasi-neutral absorption of composite capsule in the considered wavelength range. Finally, the absorptivity of a nanoparticle-doped microcapsule can be calculated using the effective homogenized medium formulae mainly in the conditions of weak chromatic dispersion of capsule absorption. This situation is usually realized with cylinder-shaped nano-inclusions or at high levels of total shell absorption. Besides, the Bruggeman mixing rule does not capture the surface plasmon resonances of nanoparticle-dope.

Proceedings Article | 18 December 2019 Paper

Investigation of multiple filamentation of high power laser radiation in air with a deformable mirror

D. Apeksimov, Yu. Geints, A. Zemlyanov, A. Iglakova, A. Kabanov, O. Kuchinskaya, G. Matvienko, V. Oshlakov, A. Petrov

Proceedings Volume 11208, 1120826 (2019) https://doi.org/10.1117/12.2540752

KEYWORDS: Deformable mirrors, Atmospheric propagation, Wavefronts, Femtosecond phenomena

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Proceedings Article | 18 December 2019 Paper

Peculiarities of the optical scheme, Telescope - Deformable Mirror, in the problems of nonlinear optics

D. Apeksimov, P. Babushkin, A. Zemlyanov, A. Kabanov, G. Matvienko, V. Oshlakov, A. Petrov, V. Ryabtsev

Proceedings Volume 11208, 1120823 (2019) https://doi.org/10.1117/12.2540746

KEYWORDS: Deformable mirrors, Nonlinear optics, Atmospheric optics, Femtosecond phenomena, High power lasers

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Proceedings Article | 11 December 2019 Paper

Regularities of nanosecond laser filamentation in the visible and near IR range of waverange (532 and 1562 nm) in a medium with strong optical nonlinearity

D. Apeksimov, P. Babushkin, A. Zemlyanov, Al. Zemlyanov, A. Kabanov, O. Kuchinskaya, G. Matvienko, A. Petrov, V. Oshlakov, O. Romanovsky, S. Sadovnikov, S. Yakovlev

Proceedings Volume 11322, 113220W (2019) https://doi.org/10.1117/12.2555278

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Proceedings Article | 11 December 2019 Paper

Influence of phase and amplitude distortions of initial beam profile on the characteristics of filamentation domain

D. Apeksimov, P. Babushkin, A. Zemlyanov, A. Kabanov, G. Matvienko, V. Oshlakov, A. Petrov

Proceedings Volume 11322, 113220X (2019) https://doi.org/10.1117/12.2554667

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Proceedings Article | 11 December 2019 Paper

Lidar measurements of emission spectra of targets and aerosols excited by filamented femtosecond Ti:Sapphire laser pulses

D. Apeksimov, P. Babushkin, A. Zemlyanov, A. Kabanov, G. Matvienko, V. Oshlakov, A. Petrov

Proceedings Volume 11322, 113221T (2019) https://doi.org/10.1117/12.2554670

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