Dr. Alexander M. Smirnov Profile

Dr. Alexander M. Smirnov

at IRE RAS

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Author

Publications (21)

Proceedings Article | 18 April 2021 Presentation + Paper

Passive Q-switched generation of all-fiber heavily erbium-doped laser

A. Smirnov, O. Butov

Proceedings Volume 11775, 117750R (2021) https://doi.org/10.1117/12.2589398

KEYWORDS: Q switched lasers, Pulsed laser operation, Absorption, Ions, Fiber lasers, Saturable absorption, Q switches, Optical components, Mirrors, Liquids

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Proceedings Article | 18 April 2021 Presentation + Paper

Second harmonic generation in colloidal solution of heterostructured CdSe/CdS quantum wells

I. Laktaev, B. Saidzhonov, R. Vasiliev, A. Smirnov, O. Butov

Proceedings Volume 11770, 117700Z (2021) https://doi.org/10.1117/12.2589264

KEYWORDS: Harmonic generation, Quantum wells, Nanostructures, Temporal resolution, Solar cells, Semiconductor lasers, Second-harmonic generation, Quantum dots, Optical microscopy, Optical imaging

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Proceedings Article | 18 April 2021 Presentation + Paper

Peculiarities of exciton interaction and relaxation in colloidal CdSe/CdS nanoplatelets

A. Smirnov, A. Golinskaya, M. Kozlova, B. Saidzhonov, R. Vasiliev, V. Mantsevich, V. Dneprovskii

Proceedings Volume 11770, 1177010 (2021) https://doi.org/10.1117/12.2589305

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Semiconductor nanocrystals have been actively studied due to their unique physical and chemical properties and are actively being implemented in nanophotonics devices. Nanostructures created by the colloidal synthesis with design shape, size and crystal structure are widely used. Recently, colloidal semiconductor quantum wells (nanoplatelets) have been created. Colloidal semiconductor nanoplatelets (NPLs) are atomically flat nanocrystals which demonstrate a zinc blend crystal structure with a [001] axis. Strong quantum confinement of NPLs and high exciton binding energy are provided by anisotropic of nanocrystals with several nanometers thick and tens of nanometers in lateral dimensions which can be used to tune the optical absorption and photoluminescence spectra. In this paper we present the peculiarities of excitation, interaction and relaxation of excitons in colloidal CdSe nanoplates depend on type and thickness of shell in the case of one-photon exciton excitation by laser pulses (λ=540 nm, τ=10 ns). The linear and nonlinear absorption spectra of colloidal CdSe NPLs were studied. The linear absorption spectrum of the NPLs demonstrate three well-resolved absorption bands that correspond to heavy hole, light hole and spin-orbital exciton transitions at room temperatures due to the almost complete absence size dispersion of nanocrystals. The differential transmission spectra allowed us to reveal experimentally the lowest four band structure of CdSe/CdS nanoplatelets at the Γ point of Brillouin zone and its modification with CdS shell thickness changing for the first time. In addition, the features of exciton-exciton interaction, exciton-phonon interaction, as well as the process of energy transfer between light and heavy excitons to exciton relaxation were investigated. The rate equations describing the exciton-exciton and exciton-electron interactions was applied for analyzing the recombination and interaction of excitons in the colloidal NPLs under high excitation densities. This work was partially supported by the Russian Foundation for Basic Research №20-32-70001

Proceedings Article | 1 April 2020 Presentation + Paper

Inertialess and resonance nonlinearity in colloidal CdSe/ZnS quantum dots in the case of two-photon excitation of excitons

I. Laktaev, A. Smirnov

Proceedings Volume 11358, 1135825 (2020) https://doi.org/10.1117/12.2565549

KEYWORDS: Absorption, Excitons, Diffraction gratings, Photons, Quantum dots, Picosecond phenomena

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Proceedings Article | 12 June 2019 Paper

Induced optical nonlinearities of colloidal Cu-doped CdSe

A. Smirnov, A. Golinskaya, P. Kotin, S. Dorofeev, V. Dneprovskii

Proceedings Volume 11026, 110261B (2019) https://doi.org/10.1117/12.2521036

KEYWORDS: Excitons, Copper, Absorption, Nonlinear optics, Luminescence, Transmission electron microscopy, Doping, Nanocrystals, Quantum dots, Optoelectronic devices

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Proceedings Article | 13 May 2019 Presentation

Saturable absorption of CdSe/CdS nanoplatelets colloidal solution (Conference Presentation)

Alexander Smirnov, Ekaterina Zharkova, Anastasiya Golinskaya, Maria Kozlova, Bedil Saidzhonov, Roman Vasiliev, Vladimir Dneprovskii

Proceedings Volume 11026, 110260F (2019) https://doi.org/10.1117/12.2521047

KEYWORDS: Nanolithography, Excitons, Saturable absorption, Absorption, Nanocrystals, Atomic layer deposition, Cadmium, Q switched lasers, Pulsed laser operation, Picosecond phenomena

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The features of the nonlinear absorption of CdSe/CdS core-shell nanocrystals based on 5 monolayer (ML) CdSe nanopletelets (NPLs) in the case of one-photon excitation of the exciton transitions by means of ultra-short laser pulses (non-stationary regime) were investigated. CdSe NPLs were synthesized by colloidal method at the temperature of 210 oC. Optical absorption spectrum of as prepared CdSe NPLs showed narrow excitonic absorption bands at 463 and 436nm corresponding to hh-e and lh-e, respectively, which indicates that the CdSe NPLs have 5ML thickness. The CdSe/CdS core-shell NPLs were obtained using method of colloidal atomic layer deposition (c-ALD). The c-ALD method allows obtaining core-shell NPLs with thickness control at the atomic monolayer level. The obtained CdSe/CdS core-shell NPLs showed narrow and pronounced hh-e and lh-e transitions characteristic for cadmium chalcogonide NPLs, which indicates their high uniformity in terms of thickness. Resonant excitation of heavy hole and light hole excitons was realized for 5CdSe/CdS, 5CdSe/2CdS, correspondingly, and non-resonant excitation both heavy hole and light hole excitons was carried out for 5CdSe/3CdS NPLs. Excitation of colloidal solution of NPLs was carried out by the second harmonic of passively Q-switched Nd3+:YAG laser (2w, λ=532 nm, the pulse duration is 30 ps). Nonlinear transmission spectra evolution was measured while changing pumping intensity. The variation of excitation intensity was realized by neutral optical filters. The increase in transmission of the exciton transitions at the excitation wavelength was observed for all three samples. This feature of nonlinear change in transmission is attributed to phase space filling effect. The greater induced bleaching was discovered for resonantly excited sample. The saturation intensity of all samples were measured about 50 MW/cm2 for non-stationary excitation regime. The transmission increases in absolute value ΔT=T-T0≈30%, with relative change in transmission ΔT/T0≈50% in the case of resonant excitation of excitons, and ΔT≈15%, ΔT/T0≈35% in the case of resonant excitation. The role of up-conversion and down-conversion processes were defined.

Proceedings Article | 14 May 2018 Paper

Features of nonlinear absorption of Bi2Te3-xSex and Bi2-xSbxTe3-ySey films

A. Smirnov, I. Laktaev, P. Kuznetsov, K. Golant

Proceedings Volume 10684, 106842K (2018) https://doi.org/10.1117/12.2322135

KEYWORDS: Bismuth, Selenium, Tellurium, Antimony, Absorption, Solids, Semiconductors, Metalorganic chemical vapor deposition, Chalcogenides, Raman spectroscopy

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Proceedings Article | 14 May 2018 Paper

Nonlinear properties of CdSe/ZnS quantum dots colloidal solutions under one- and two-photon excitation by means of high-power ultrashort laser pulses

A. Smirnov, Y. Valchuk, M. Kozlova, V. Mantsevich, V. Dneprovskii

Proceedings Volume 10684, 1068420 (2018) https://doi.org/10.1117/12.2306989

KEYWORDS: Absorption, Excitons, Quantum dots, Ultrafast phenomena, Nonlinear optics, Semiconductors

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Proceedings Article | 14 May 2018 Paper

Nonlinear effects in colloidal nanoplatelets with two-dimensional electronic structure

A. Smirnov, A. Golinskaya, M. Kozlova, D. Przhiyalkovskii, B. Saidjonov, R. Vasiliev, V. Dneprovskii

Proceedings Volume 10684, 1068421 (2018) https://doi.org/10.1117/12.2306999

KEYWORDS: Absorption, Excitons, Nanostructures, Nonlinear optics, Optoelectronic devices, Refraction, Nanocrystals, Semiconductors, Luminescence

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Proceedings Article | 14 May 2018 Paper

Tyndall scattering in colloidal solution of quantum dots under the action of laser pulses

A. Smirnov, A. Golinskaya, K. Ezhova, V. Dneprovskii

Proceedings Volume 10684, 106841U (2018) https://doi.org/10.1117/12.2306729

KEYWORDS: Quantum dots, Light scattering, Excitons, Absorption, Nanoparticles

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Proceedings Article | 26 June 2017 Paper

Modeling of nondestructive method for doped semiconductor layer diagnostics and experimental realization in a colloidal quantum dots

A. Smirnov, A. Boriskin, V. Dneprovskii

Proceedings Volume 10330, 103301M (2017) https://doi.org/10.1117/12.2270277

KEYWORDS: Four wave mixing, Semiconductors, Diagnostics, Photonic crystals, Nondestructive evaluation, Quantum dots, Crystals, Excitons, Diffraction gratings, Diffraction, Nonlinear optics, Picosecond phenomena, Polarization

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Proceedings Article | 30 May 2017 Paper

Dynamic photonic crystals dimensionality tuning by laser beams polarization changing

Anastasia Golinskaya, Yulia Stebakova, Yana Valchuk, Aleksandr Smirnov, Vladimir Mantsevich

Proceedings Volume 10228, 1022812 (2017) https://doi.org/10.1117/12.2264933

KEYWORDS: Polarization, Optical properties, Semiconductors, Refraction, Absorption, Diffraction gratings, Photonic crystals, Dielectric polarization, Crystals, Modulation, Quantum dots, Photon polarization, Refractive index, Laser optics, Laser crystals, Photonic crystal devices

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Proceedings Article | 16 May 2017 Paper

Creation technique and nonlinear optics of dynamic one-dimensional photonic crystals in colloidal solution of quantum dots

A. Smirnov, A. Golinskaya, K. Ezhova, M. Kozlova, J. Stebakova, Y. Valchuk

Proceedings Volume 10228, 102281C (2017) https://doi.org/10.1117/12.2265880

KEYWORDS: Excitons, Diffraction, Transparency, Photonic crystals, Nonlinear optics, Dielectrics, Quantum dots, Refractive index, Modulation, Laser beam propagation, Structural dynamics, Refraction, Absorption

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Proceedings Article | 16 May 2017 Paper

Optical features of zinc selenide, silver iodide and its two-phase composite nanostructures

A. Smirnov, V. Tomaev, A. Golinskaya, M. Kozlova, J. Stebakova, Y. Valchuk, E. Borisov, V. Polishchuk

Proceedings Volume 10231, 1023126 (2017) https://doi.org/10.1117/12.2265871

KEYWORDS: Nanostructures, Laser ablation, Zinc, Silver, Semiconductors, Optical sensors, Integrated optics, Nanocrystals, Sensors, Thin films, Composites, Optical design, Semiconductor materials

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Proceedings Article | 27 April 2016 Paper

Optical systems modeling and experimental realization of pump and probe technique: investigation of nonlinear absorption in colloidal quantum dots

A. Smirnov, A. Golinskaya, K. Ezhova, M. Kozlova, V. Dneprovskii

Proceedings Volume 9889, 98890R (2016) https://doi.org/10.1117/12.2227855

KEYWORDS: Systems modeling, Quantum dots, Excitons, Luminescence, Beam shaping, Light scattering, Scattering, Quantum dots, Nonlinear optics, Absorption, Saturable absorption, Ray tracing, Laser scattering

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Proceedings Article | 27 April 2016 Presentation + Paper

Three-dimensional dynamic photonic crystal creation by four laser beams interference in colloidal quantum dots

A. Smirnov, V. Mantsevich, K. Ezhova, I. Tikhonov, V. Dneprovskii

Proceedings Volume 9894, 98940O (2016) https://doi.org/10.1117/12.2227839

KEYWORDS: Photonic crystals, Quantum dots, Nonlinear optics, Absorption, Excitons, Semiconductors, Refraction, Diffraction gratings, Picosecond phenomena, Refractive index, Crystals, Diffraction

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Proceedings Article | 18 May 2015 Paper

Modeling of self-diffraction from the induced aperture in colloidal quantum dots

K. Ezhova, A. Smirnov

Proceedings Volume 9503, 950315 (2015) https://doi.org/10.1117/12.2178661

KEYWORDS: Absorption, Excitons, Diffraction, Transparency, Semiconductors, Quantum dots, Pulsed laser operation, Visible radiation, Optical simulations, Near field diffraction

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Proceedings Article | 18 May 2015 Paper

Degenerate four-wave mixing and two-photon induced gratings in colloidal quantum dots CdSe/ZnS

A. Smirnov, M. Kozlova, V. Dneprovskii

Proceedings Volume 9503, 950304 (2015) https://doi.org/10.1117/12.2178667

KEYWORDS: Excitons, Absorption, Diffraction gratings, Quantum dots, Photons, Four wave mixing, Diffraction, Photonic crystals, Refraction, Laser energy

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Proceedings Article | 1 May 2014 Paper

Self-action effects in semiconductor quantum dots

V. Dneprovskii, A. Kanev, M. Kozlova, A. Smirnov

Proceedings Volume 9136, 91361Y (2014) https://doi.org/10.1117/12.2052459

KEYWORDS: Excitons, Absorption, Quantum dots, Diffraction gratings, Photonic crystals, Transparency, Semiconductors, Diffraction, Picosecond phenomena, Refraction

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Proceedings Article | 8 May 2013 Paper

Self-diffraction of laser beams in the case of resonant excitation of excitons in colloidal CdSe/ZnS quantum dots

V. Dneprovskii, A. Smirnov, M. Kozlova

Proceedings Volume 8772, 877209 (2013) https://doi.org/10.1117/12.2017347

KEYWORDS: Excitons, Absorption, Quantum dots, Diffraction gratings, Picosecond phenomena, Transparency, Pulsed laser operation, Refraction, Mode locking, Semiconductors

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Proceedings Article | 12 January 2011 Paper

State-filling and self-action processes at resonant excitation of excitons in colloidal quantum dots

V. Dneprovskii, M. Kozlova, T. Wumaier, E. Zhukov, Sy Hieu Dau, A. Smirnov

Proceedings Volume 7993, 79931R (2011) https://doi.org/10.1117/12.881197

KEYWORDS: Absorption, Excitons, Semiconductors, Quantum dots, Electrons, Luminescence, Picosecond phenomena, Nonlinear optics, Transparency, Optical semiconductors

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Showing 5 of 21 publications

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