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7 results on '"Andrey Yakovets"'

1. Application of the coupled classical oscillators model to the Fano resonance build-up in a plasmonic nanosystem

Author

Pavel Golovinski, Andrey Yakovets, and Egor Khramov

Subjects
fano resonance, model of coupled oscillators, ultrashort laser pulse, nanoantenna, Information theory, Q350-390, Optics. Light, QC350-467
Abstract

We study the excitation dynamics of Fano resonance within the classical model framework of two linear coupled oscillators. An exact solution for the model with a damped harmonic force is obtained. Details of the growth of a Fano profile under the harmonic excitation are shown. For an incident ultra-wideband pulse, the reaction of the system becomes universal and coincides with the time-dependent response function. The results of numerical calculations clarify two alternative ways for the experimental measurement of complete characteristics of the system: via direct observation of the system response to a monochromatic force by frequency scanning or recording the time-dependent response to a d-pulse. As a specific example, the time-dependent excitation in a system consisting of a quantum dot and a metal nanoparticle is calculated. Then, we show the use of an extended model of damped oscillators with radiative correction to describe the plasmon Fano resonance build-up when a femtosecond laser pulse is scattered by a nanoantenna.

Published
2019
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3. The Influence of the Material and Geometrical Shape of a Semiconductor Nanoparticle on the Sensitivity of an Optical Plasmon Sensor

Author

Evgeniya V. Sakhno, Andrey Yakovets, Sergey V. Sakhno, Valery A. Astapenko, and E. S. Khramov

Subjects
0106 biological sciences, Work (thermodynamics), Materials science, business.industry, Physics::Optics, Nanoparticle, Discrete dipole approximation, 010603 evolutionary biology, 01 natural sciences, 010602 entomology, Optoelectronics, Sensitivity (control systems), Surface plasmon resonance, business, Refractive index, Semiconductor Nanoparticles, Plasmon
Abstract

In the work, the comparison of sensitivities of optical plasmon sensors constructed on the basis of semiconductor nanoparticles of various shapes is presented. The calculation was made within the framework of the dipole approximation. A characteristic of sensitivity is the value of the shift of the plasmon resonance maximum per unit change in the refractive index of a medium. The influence of the material of a nanoparticle and its shape on the sensitivity of an optical plasmon sensor is shown.

Published
2020
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4. Sensitivity Calculation of An Optical Plasmon Sensor Based on Semiconductor Nanoparticles of Different Shapes

Author

Andrey Yakovets, E. S. Khramov, EvgeniyaV. Sakhno, Sergey V. Sakhno, and Valeriy Astapenko

Subjects
Nanostructure, Materials science, business.industry, Nanoparticle, Optoelectronics, General Medicine, Sensitivity (control systems), business, Polarization (waves), Biosensor, Electromagnetic radiation, Semiconductor Nanoparticles, Plasmon
Abstract

At present, almost all areas of human activities involve the use of nanoparticles for solving various technical issues [1-6]...

Published
2020
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5. Absorption of Radiation by ITO Semiconductor Nanoparticles in Plasmon Resonance Region

Author

E. S. Manuilovich, Valery A. Astapenko, Andrey Yakovets, E. S. Khramov, and Sergey V. Sakhno

Subjects
Materials science, business.industry, Mie scattering, Physics::Optics, Nanoparticle, 02 engineering and technology, Radiation, Discrete dipole approximation, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Condensed Matter::Materials Science, Cross section (physics), Optoelectronics, Physical and Theoretical Chemistry, Surface plasmon resonance, 0210 nano-technology, business, Absorption (electromagnetic radiation), Plasmon
Abstract

The radiation absorption cross section of indium–tin oxide (ITO) semiconductor nanoparticles of various sizes placed in various media is calculated in the region of plasmon resonance. The photoabsorption cross sections calculated within the framework of the Mie theory and in the dipole approximation are compared with each other and with the available experimental data. The limits of applicability of the dipole approximation are determined. The prospects of using these nanoparticles as an active material in optical plasmon sensors are assessed.

Published
2018
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6. Optical Plasmon Sensor Based on Ellipsoidal Semiconductor Nanoparticles

Author

Egor S. Manuilovich, Valery A. Astapenko, E. S. Khramov, Andrey Yakovets, Sergey V. Sakhno, and Evgeniya V. Sakhno

Subjects
0106 biological sciences, Materials science, business.industry, Physics::Optics, Nanoparticle, Radiation, Polarization (waves), 010603 evolutionary biology, 01 natural sciences, Ellipsoid, 010602 entomology, Semiconductor, Optoelectronics, business, Semiconductor Nanoparticles, Plasmon
Abstract

In the work, the physico-mathematical model of an optical plasmon sensor constructed on the basis of semiconductor ellipsoidal nanoparticles is proposed. It is shown that the sensitivity of such a sensor is proportional to the value of the ellipsoid semiaxis along which polarization of acting radiation is directed.

Published
2019
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7. Scattering of Electromagnetic Radiation by ITO Nanoparticles with Various Doping Levels

Author

A. S. Bugaev, E. S. Khramov, Andrey Yakovets, E. S. Manuilovich, Valery A. Astapenko, and Sergey V. Sakhno

Subjects
Materials science, Computational Mechanics, Oxide, General Physics and Astronomy, chemistry.chemical_element, Nanoparticle, 02 engineering and technology, Radiation, 010402 general chemistry, digestive system, 01 natural sciences, Electromagnetic radiation, chemistry.chemical_compound, Scattering, business.industry, Doping, equipment and supplies, 021001 nanoscience & nanotechnology, 0104 chemical sciences, chemistry, Mechanics of Materials, Optoelectronics, Particle size, 0210 nano-technology, Tin, business
Abstract

The process of scattering of radiation by indium‒tin oxide (ITO) nanoparticles is theoretically studied at various degrees of doping and for different radii of nanoparticles. Qualitative conclusions are made about the character of the dependence of the scattering cross section on the frequency with variation of the particle size and the percentage content of tin. The prospects of using ITO nanoparticles as an active substance in optical sensors are estimated.

Published
2018
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