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48 results on '"Khakhomov, S. A."'

3. Production and Experimental Study of a Weakly Reflecting Absorbing Metamaterial Based on Planar Spirals in the Microwave Range

Author

Semchenko, I., Samofalov, A., Kravchenko, A., Khakhomov, S., Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Khakhomov, Sergei, editor, Semchenko, Igor, editor, Demidenko, Oleg, editor, and Kovalenko, Dmitry, editor

Published
2022
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4. Raman Investigation of Multiferroic Bi1-xSmXFeO3 Materials Synthesized by the Sol–gel Method

Author

Fesenko, O., Tsebriienko, T., Yaremkevych, A., Sidsky, V. V., Semchenko, A. V., Gaishun, V. E., Kovalenko, D. L., Khakhomov, S. A., Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Khakhomov, Sergei, editor, Semchenko, Igor, editor, Demidenko, Oleg, editor, and Kovalenko, Dmitry, editor

Published
2022
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7. Structural Properties of BiFeO3 and Bi0,9La0,1FeO3 Powders Synthesized by Sol-Gel Process

Author

Semchenko, A. V., Khakhomov, S. A., Sidsky, V. V., Gaishun, V. E., Kovalenko, D. L., Strek, W., Hreniak, D., Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, and Várkonyi-Kóczy, Annamária R., editor

Published
2020
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8. Formation and Research of Properties of Photocatalytic Materials on the Basis of TiO2 for Water Treatment

Author

Kovalenko, D. L., Gaishun, V. E., Vaskevich, V. V., Khakhomov, S. A., Khudaverdyan, S. K., Ayvazyan, G. Y., Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, and Várkonyi-Kóczy, Annamária R., editor

Published
2020
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9. Broadband reflectionless metasheets: Frequency-selective transmission and perfect absorption

Author

Asadchy, V. S., Faniayeu, I. A., Ra'di, Y., Khakhomov, S. A., Semchenko, I. V., and Tretyakov, S. A.

Subjects
Physics - Optics
Abstract

Energy of propagating electromagnetic waves can be fully absorbed in a thin lossy layer, but only in a narrow frequency band, as follows from the causality principle. On the other hand, it appears that there are no fundamental limitations on broadband matching of thin absorbing layers. However, known thin absorbers produce significant reflections outside of the resonant absorption band. In this paper we explore possibilities to realize a thin absorbing layer which produces no reflected waves in a very wide frequency range, while the transmission coefficient has a narrow peak of full absorption. Here we show, both theoretically and experimentally, that a wide-band-matched thin resonant absorber, invisible in reflection, can be realized if one and the same resonant mode of the absorbing array unit cells is utilized to create both electric and magnetic responses. We test this concept using chiral particles in each unit cells, arranged in a periodic planar racemic array, utilizing chirality coupling in each unit cell but compensating the field coupling at the macroscopic level. We prove that the concept and the proposed realization approach also can be used to create non-reflecting layers for full control of transmitted fields. Our results can have a broad range of potential applications over the entire electromagnetic spectrum including, for example, perfect ultra-compact wave filters and selective multi-frequency sensors., Comment: 9 pages, 10 figures

Published
2015
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10. Ferroelectric Properties of Nanostructured SBTN Sol-Gel Layers

Author

Sidsky, V. V., Semchenko, A. V., Khakhomov, S. A., Morozovska, A. N., Morozovsky, N. V., Kolos, V. V., Turtsevich, A. S., Pyatlitski, A. N., Pleskachevsky, Yu M., Shil’ko, S. V., Petrokovets, E. M., Kacprzyk, Janusz, Series editor, Jabłoński, Ryszard, editor, and Szewczyk, Roman, editor

Published
2017
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11. Photoactive Properties of Transport Sol-Gel Layers Based on Strontium Titanate for Perovskite Solar Cells

Author

Semchenko, A. V., Ayvazyan, G. Y., Malyutina-Bronskaya, V. V., Khakhomov, S. A., Kovalenko, D. L., Boiko, A. A., Sidski, V. V., Nestsiaronak, A. V., Mayevsky, A. A., Danilchenko, K. D., Zhigulin, D. V., Pilipenko, V. A., Subasri, R., Gaponenko, N. V., Semchenko, A. V., Ayvazyan, G. Y., Malyutina-Bronskaya, V. V., Khakhomov, S. A., Kovalenko, D. L., Boiko, A. A., Sidski, V. V., Nestsiaronak, A. V., Mayevsky, A. A., Danilchenko, K. D., Zhigulin, D. V., Pilipenko, V. A., Subasri, R., and Gaponenko, N. V.

Abstract

In this work, we have investigated the photocurrent and spectral sensitivity of the silicon/SrTiO3:xNb/perovskite structures. The sol–gel method carried out the deposition of undoped SrTiO3 layers as well as niobium-doped (SrTiO3:Nb) layers at atomic concentrations of 3 and 6% Nb. The perovskite layer, CH3NH3PbI3_xClx, has been deposited by the vacuum co-evaporation technique. The layers have been characterized by scanning electron microscopy and X-ray diffraction measurements. The volt–ampere characteristics and spectral sensitivity of the fabricated samples have been measured under illumination with selective wavelengths of 405, 450, 520, 660, 780, 808, 905, 980, and 1064 nm of laser diodes. We have shown that for different configurations of applied voltage between silicon, SrTiO3:xNb, and CH3NH3PbI3_xClx, the structures are photosensitive ones with a variation of photocurrent from microamperes to milliamperes depending on Nb concentration in SrTiO3, and the highest photocurrent and spectral sensitivity values are observed when a SrTiO3:Nb layer with 3 at.% of Nb is used. A possible application of the proposed structure with a SrTiO3:Nb layer for perovskite solar cells and photodetectors is being discussed.

Published
2023

15. Ferroelectric Properties of Nanostructured SBTN Sol-Gel Layers

Author

Sidsky, V. V., primary, Semchenko, A. V., additional, Khakhomov, S. A., additional, Morozovska, A. N., additional, Morozovsky, N. V., additional, Kolos, V. V., additional, Turtsevich, A. S., additional, Pyatlitski, A. N., additional, Pleskachevsky, Yu M., additional, Shil’ko, S. V., additional, and Petrokovets, E. M., additional

Published
2016
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27. Optimal angular stability of reflectionless metasurface absorbers

Author

del Risco, J. P., primary, Mikhalka, I. S., additional, Lenets, V. A., additional, Sidorenko, M. S., additional, Sayanskiy, A. D., additional, Glybovski, S. B., additional, Samofalov, A. L., additional, Khakhomov, S. A., additional, Semchenko, I. V., additional, Ortiz, J. D., additional, and Baena, J. D., additional

Published
2021
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29. Investigation of electromagnetic properties of a high absorptive, weakly reflective metamaterial--substrate system with compensated chirality.

Author

Semchenko, I. V., Khakhomov, S. A., Asadchy, V. S., Golod, S. V., Naumova, E. V., Prinz, V. Ya., Goncharenko, A. M., Sinitsyn, G. V., Lyakhnovich, A. V., and Malevich, V. L.

Subjects
*ELECTROMAGNETISM, *METAMATERIALS, *CHIRALITY, *ELECTROMAGNETIC waves, *ANISOTROPIC crystals, *MAGNETIC permeability, *PERMITTIVITY, *OPTICAL reflection
Abstract

In the present paper, a theoretical and experimental study of a highly absorptive, weakly reflective coating designed and fabricated on the basis of 3D THz resonant elements is reported. Transmission and reflection of electromagnetic waves from the metamaterial-substrate structure involving a highly absorptive, weakly reflective array of artificial bi-anisotropic elements were analyzed. The samples contained paired right-handed and left-handed helices, due to the fact that the chirality was compensated. The parameters of helices were optimized to achieve roughly identical values of dielectric permittivity and magnetic permeability. As a result, the metamaterial exhibited weak reflectivity in the vicinity of resonance frequency. On the other hand, effective resonance properties of the helices were tuned to ensure substantial absorption of THz radiation. Analytical expressions for the coefficients of radiation reflection and transmission in the samples were derived by solving a boundary-value problem for the propagation of electromagnetic waves in the metamaterial-substrate system. Simulated properties of fabricated structures were compared with experimental data. [ABSTRACT FROM AUTHOR]

Published
2017
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40. Charge-Carrier Drift Influence on the Electroacoustic Interactions in Piezoelectric Semiconductors With Induced Chiral Properties

Author

GOMEL STATE UNIV (BELARUS) DEPT OF GENERAL PHYSICS, Khakhomov, S. A., GOMEL STATE UNIV (BELARUS) DEPT OF GENERAL PHYSICS, and Khakhomov, S. A.

Abstract

Effects of charge-carrier drift on the electroacoustic interactions in piezoelectric semiconductors with spatial dispersion and induced chiral properties is studied. The wave numbers and ellipticities of eigenmodes of acoustic waves are found and effects of charge-carrier drift are investigated. Boundary-value problem for a slab under rotating electric field influence is solved., Presented at Intl. Conference on Electromagnetics of Complex Media (8th), Lisbon, PT, 27-29 Sep 2000, p79-82. This article is from ADA398724 International Conference on Electromagnetics of Complex Media (8th), Held in Lisbon, Portugal on 27-29 September 2000. Bianisotropics 2000

Published
2000

41. Electromagnetic Waves in Chiral Media With Compensated Anisotropy

Author

GOMEL STATE UNIV (BELARUS) DEPT OF GENERAL PHYSICS, Semchenko, I. V., Khakhomov, S. A., Tretyakov, S. A., Sihvola, A. H., GOMEL STATE UNIV (BELARUS) DEPT OF GENERAL PHYSICS, Semchenko, I. V., Khakhomov, S. A., Tretyakov, S. A., and Sihvola, A. H.

Abstract

We consider and compare three different cases of anisotropy compensation in chiral media. The first case concerns natural crystals or nonmagnetic superlattices, the second case is the class of stratified-periodic structures, which are homogeneous media in the long-wave approximation and have simultaneously dielectric and magnetic properties. The third possible case can be realized as inhomogeneous structures with spiral anisotropy of dielectric and magnetic properties., Presented at Intl. Conference on Electromagnetics of Complex Media (8th), Lisbon, PT, 27-29 Sep 2000, p197-202. This article is from ADA398724 International Conference on Electromagnetics of Complex Media (8th), Held in Lisbon, Portugal on 27-29 September 2000. Bianisotropics 2000

Published
2000

46. Electromagnetic Waves in Artificial Chiral Structures with Dielectric and Magnetic Properties.

Author

Semchenko, I. V., Khakhomov, S. A., Tretyakov, S. A., and Sihvola, A. H.

Subjects
*ELECTROMAGNETIC waves, *CHIRALITY, *DIELECTRICS
Abstract

In this paper plane wave reflection and transmission phenomena in slabs of artificial anisotropic chiral media, taking into account dielectric and magnetic properties, are theoretically considered. The artificial medium is a superlattice of chiral layers and anisotropic magnetic layers. Biaxial symmetry of the medium is defined by the direction of spiral inclusions and the direction normal to the interfaces between layers. Normal incidence is assumed. The effect of compensation of magnetic and dielectric anisotropy is discussed. A new device based on this effect is proposed. [ABSTRACT FROM AUTHOR]

Published
2001
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