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Sergei Khakhomov

Sergei Khakhomov
Francisk Skorina Gomel State University, Gomel, Belarus · Optics

Professor of Optics Department, Doctor of Sciences in Optics, Candidate of Sciences (PhD) in Solid State Physics

About

89
Publications
5,355
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655
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June 2016 - present

Publications

Publications (89)
Article
Full-text available
Fano resonance is based on plasmonic metasurfaces and has many applications in all kinds of fields. In this paper, we propose an independently switchable double-layer raster structure based on graphene. Depending on the highly adjustable nature of graphene, the Fermi energy level can be adjusted to control the Fano resonance at different wavelength...
Article
Full-text available
The possibility of using a conducting double DNA-like helix as the basis of an electromagnetic wave polarizer, which converts an incident linearly polarized wave into a reflected wave with circular polarization, has been shown. A high-frequency resonance is studied, at which the wavelength of the incident radiation is approximately equal to the len...
Preprint
Fano resonance is based on plasmonic metasurfaces and has many applications in all kinds of fields. In this paper, we propose an independently switchable double-layer raster structure based on graphene. Depending on the highly adjustable nature of graphene, the Fermi energy level can be adjusted to control the Fano resonance at different wavelength...
Article
The design and modeling of a metasurface is carried out, which makes it possible to transform an incident linearly polarized electromagnetic wave into a transmitted wave with elliptical polarization close to circular. At the same time, the reflection coefficient of the wave is close to zero at the resonant frequency, since the metasurface is simila...
Chapter
Full-text available
The present work presents the results of the investigation of multiferroic materials (BiFeO3 and Bi1-xSmXFeO3) with perovskite structure, which possesses two types of orderings: ferromagnetic and ferroelectric. Also, the obtained samples were investigated by Raman spectroscopy to provide detailed information about chemical structure, phase purity a...
Article
Full-text available
We present a hybrid Tamm system targeting the tunable multichannel absorber. The proposed optical absorber is analyzed and investigated by using the transfer matrix method (TMM). The numerical and theoretical studies show that the four perfect absorption peaks are generated by two types of resonant modes excited in the structure, which can be reaso...
Article
This paper presents ultrathin multi-focusing metalenses that can produce several independent focusing spots, useful in imaging for light flow redistribution, even asymmetrical into many focal spots. The proposed design includes quadrangular frustum pyramids serving as individually tuned nanoantennas; their structure can be modified, facilitating wa...
Article
In recent years, the research on tunable and high-performance terahertz devices has attracted widespread attention. In this paper,we propose a novel refractive index sensor consisting of monolayer graphene and multilayer photonic crystal with a defect layer. It is found that Tamm plasmon polaritons can be excited at the top graphene interface, whic...
Preprint
Full-text available
We present a hybrid Tamm system targeting the tunable multichannel absorber. The proposed optical absorber is analyzed and investigated by using the transfer matrix method (TMM). The numerical and theoretical studies show that the four perfect absorption peaks are generated by two types of resonant modes excited in the structure, which can be reaso...
Article
Full-text available
Pure BiFeO3 (BFO) and doped Bi0.9La0.1FeO3 (BLFO) thin films were prepared on Pt/TiO2/SiO2/Si substrates by a modified sol–gel technique using a separate hydrolysis procedure. The effects of final crystallization temperature and La doping on the phase structure, film morphology, and nanoscale piezoelectric properties were investigated. La doping an...
Article
In this work, we investigate the possibilities of reaching wide-angle perfect absorption with Huygens' metasurfaces possessing both electric and magnetic responses. We analyze the role of the anisotropy of the polarizability tensor of the unit cell and reveal the conditions for the optimal angular stability in symmetric absorption as well as polari...
Preprint
Full-text available
We present a tunable multichannel absorbers in a hybird optical Tamm system at near-infrared frequencies. The simulation results reveal the structure capable of exciting four perfect absorption peaks, which are generated by two types of resonance, namely a guide-mode resonance (GMR) in a graphene-based grating and optical resonance induced by Tamm...
Article
Full-text available
Graphene-based hyperbolic metamaterials are well known for their optical anisotropy, high absorption of electromagnetic radiation, and low energy loss. We proposed a novel multilayer graphene-silica hyperbolic metamaterial designed as a grating structure providing narrowband near-perfect absorption of radiation in a mid-infrared band. The absorber...
Article
Full-text available
In this paper we study electromagnetic forces induced on DNA and DNA-like helices by external electromagnetic waves. We consider simultaneously occurring forces and torques, interconnected and acting along the double helix axis. Since the DNA molecule has an absorption band in the ultraviolet and visible range near wavelengths = 280 nm and = 500 nm...
Article
Full-text available
In the article the metamaterials and metasurfaces which consist of metal helices and omega elements of classical or rectangular types are considered. It is analyzed the similarities and differences between metamaterials and crystals.
Article
Full-text available
In this paper, we propose a tunable coordinated multi-band absorber that combines graphene with metal-dielectric-metal structures for the realization of multiple toward perfect absorption. The parametric inversion method is used to extract the equivalent impedance and explain the phenomena of multiple-peak absorption. With the change of the Fermi l...
Article
Full-text available
The paper aimed to study the interaction of the THz range electromagnetic waves with metamaterials, consisting of rectangular omega elements, as well as to develop a one-sided and double-sided “ideal” THz wave absorber based on such structures.
Article
The sensors with multifold nanorod metasurfaces array based on hyperbolic metamaterials with a multi-film structure are proposed in this paper. The Fano-like effect is analyzed to explain the coupling between different hyperbolic metamaterials structures. The sensors can be improved not only by changing the structure parameters, but also by changin...
Chapter
In this paper a double DNA-like helix as a promising element of metamaterials, metasurfaces and antenna systems for various frequency ranges is considered. The article demonstrates the possibility of creating the required radiation pattern of such a helix, excited by a plane electromagnetic wave by changing its angle of incidence. It is shown, that...
Chapter
The paper aims to create a new type of polarizers in the THz range of electromagnetic waves, comprising an array of micro-dimensional planar rectangular omega elements. The metal omega elements under consideration have a well-balanced shape, since the incident electromagnetic wave induces in them an electric dipole moment and a magnetic moment, whi...
Chapter
The paper describes the sol-gel method for producing photocatalytic materials based on titanium oxide. The temperature-time regimes of heat treatment of the obtained materials are determined. The surface properties of the resulting coatings were studied by scanning electron microscopy and asthmatic force microscopy. The photocatalytic properties of...
Chapter
The present work aims to design and study novel functional materials with multiferroic properties required in electric applications, such as magnetic and magnetoresistive sensors, actuators, microwave electronic devices, phase shifters, mechanical actuators etc. Complex oxides BiFeO3 and Bi0,9La0,1FeO3 for analysis of its structural properties were...
Conference Paper
Full-text available
A double DNA-like helix in which two strands are mutually displaced along a common axis is considered. A high-frequency resonance is investigated, at which the wavelength of the incident radiation is approximately equal to the length of a helix turn. All three components of the electric force and magnetic force acting on an arbitrary element of one...
Presentation
Full-text available
In this paper a double DNA-like helix as a promising element of metamaterials, metasurfaces and antenna systems for various frequency ranges is considered. The article demonstrates the possibility of creating the required radiation pattern of such a helix, excited by a plane electromagnetic wave by changing its angle of incidence. It is shown, that...
Article
Full-text available
In this paper, we propose a tunable, multi-band, selective absorber composed of multiple layers. Each layer consisted of SiO2/graphene/SiC, and a layer of silver was used as the ground plane of the entire structure. Simulation results show that we can passively and actively coordinate the resonant frequency of the perfect absorption peak by changin...
Article
In this paper, we theoretically and numerically demonstrate a dual-band independently adjustable absorber comprising an array of stacked molybdenum disulfide (MoS2) coaxial nanodisks and a gold reflector that are separated by two dielectric insulating layers. The array plane functionality is explained by the dipole resonances with the MoS2 nanodisk...
Article
Full-text available
In this research, the features of electro-induced periodical structures in the volume of LiTaO 3 thin plate were theoretically and experimentally investigated. For the theoretical and experimental investigations, the calculations based on the finite element method and measuring of the surface acoustic wave (SAW) interaction were implemented simulta...
Chapter
The present work aims to design and study novel functional materials with multiferroic properties required in electric applications, such as magnetic and magnetoresistive sensors, actuators, microwave electronic devices, phase shifters, mechanical actuators etc. Complex oxides BiFeO 3 for analysis of its magnetic properties were synthesized by sol-...
Chapter
The objective of the paper is to create on the basis of omega-shaped bianisotropic elements new absorbing metamaterials and coatings that do not have a reflecting base and are “invisible” on the irradiated side.
Conference Paper
The great problem for ferroelectric capacitors is the physico-chemical and mechanical interaction of ferroelectric films with surrounding materials, which leads to degrading of the characteristics of the ferroelectric element, increasing of current leakage and degradation of the transistor structures. Nanostructured ferroelectric films with the gen...
Conference Paper
The objective of the paper is creating wide-band polarization transformers consisting of two-dimensional regular array of omega-elements on the substrate, which show resonance-frequency behavior in THz frequency range.
Article
Here we present theoretical results for estimation of electromagnetic field energy density and absorbed energy in dispersive lossy chiral single-component metamaterials which consist of an ensemble of identical helical resonators as inclusions. The shape of the helical resonator can vary over a wide range, from a straight wire to a flat split ring....
Article
A twist polarizer metasurface for polarization rotation by an angle of 90° is proposed and realized at microwave frequencies. The metasurface consists of sub-wavelength metallic helices arranged periodically in a single layer and operates in transmission geometry with a nearly unity cross-polarization conversion coefficient at resonance. The struct...
Chapter
The properties of an artificial anisotropic structure composed of omega-elements are numerically simulated. Analytical expressions for the dielectric, magnetic and magnetoelectric susceptibilities of the structure are derived. The frequency dependence of the effective parameters of a metamaterial has been determined taking into account trajectories...
Article
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...
Chapter
Method of chemical-mechanical polishing (CMP) approach to production submicron and deep submicron levels. For monocrystalline silicon wafer by CMP, we have developed a suspension, containing solid phase, amorphous, spherical particles of nanosized aerosil. SiO2 particles are homogenously distribute in an alkaline medium. Removing material in CMP is...
Conference Paper
Full-text available
One of the urgent problems of modern engineering is to obtain a ferroelectric capacitor for various structures. A promising material in the class of ferroelectrics with perovskite structure is strontium bismuth tantalate-niobate SrxBiyNbzTa2?zO9 (SBTN). The synthesized layers should be homogeneous on structure and thickness, to have good fatigue ch...
Article
Full-text available
In the present article, we study the long bifilar helix in which electric currents are quasi-stationary, i.e. the wavelength of the electromagnetic field is much longer than the turn of the helix. All components of the force acting on a physically small element of one helix from the other helix having a big length are calculated. The case when the...
Article
Full-text available
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 resonant absorbing layers. However, known thin absorbers produce significant refl...
Article
In the present paper, we study electromagnetic properties of single-turn, double-turn and DNA-like helices in microwave range. In particular, we determine the magnetic flux density in the center of the inclusions and their inductance and capacitance. In this paper we have numerically obtained the magnetic field of different kinds of helices: the si...
Article
Full-text available
The electrically thin absorber of electromagnetic waves is under study. We proposed a new concept of the perfect absorber which consists from a single layer of the smooth double-turn helices. This allows one to design an absorber with unprecedentedly small thickness. Simple and smooth shape of the helices makes them more preferable from experimenta...
Article
We present a new ultrathin metamaterial that acts as a frequency-selective absorber of terahertz radiation. The absorber is a square array of pairs of omega-shaped micro-resonators made of high-ohmic-loss metal. The metamaterial provides significant suppression of transmitted and reflected radiation in a bidirectional regime (that is, for both forw...
Article
This article describes some of the paths through which electromagnetics research of complex media and metamaterials has reached the present active state. In particular, events of a period in 1990s will be illuminated during which new scientific contacts between Former Soviet Union and the West were established. The series of chiral and bianisotropi...
Article
Full-text available
The properties of an artificial anisotropic structure formed by microhelices have been numerically simulated by the example of a specially designed sample. The sample contains paired helices with right- and left-handed twisting directions, due to which the metamaterial chirality is compensated for. Helices are characterized by precalculated optimal...
Article
Full-text available
We realized and experimentally tested a conceptually new kind of electrically thin absorbers of electromagnetic waves. The idea is to utilize a single layer of precisely designed meta-atoms. This allows one to design an absorber with unprecedentedly small thickness. The absorber implies absence of a ground plane. High efficiency of the realized str...
Article
Full-text available
In this work, we consider potential energy of recently conceptualized optimal (balanced) bianisotropic particles in electromagnetic fields. The case of non-resonant lossless particles is studied. Knowing the potential energy of optimal bianisotropic particles in the fields of the respective excitations, we find the acting force on the particle in i...
Conference Paper
Uniaxial electrically thin layers formed by arrays of smooth helices are under study. Simple and smooth shape of the helices makes them more preferable from experimental point of view in comparison to other chiral particles. Here we optimize by simulation mutual orientation and density of the helices in the array so that it acts as a twist-polarize...
Conference Paper
In this article we study scattering of plane electromagnetic waves by a metal cylinder surrounded by straight copper wires. Possibility to achieve partial recovery of the wave front behind the cylinder is demonstrated with certain parameters of the wires and their location in the structure. Reconstruction of the wave front is observed in frequency...
Article
Full-text available
The chiral properties of an artificial anisotropic structure composed of microhelices are numerically simulated using the example of a sample developed by a team of authors from the Institute of Semiconductor Physics of the Russian Academy of Sciences. It is shown that this artificial structure can exhibit strong chiral properties in the THz range....
Article
Full-text available
Study of polarization properties of DNA was chosen as one of primarily important inconnection with asymmetry of the shape of DNA. The preliminary theoretical calculation showed that the shape of DNA is optimal for formation of a circularly polarized electromagnetic wave under the assumption of resonance (~ 10 nm). The experimental study conducted a...
Article
Currently, 2D and 3D structures of different symmetries can be formed from DNA molecules. The electromagnetic properties of this new natural chiral material can be changed by metalizing DNA. Spatial structures of this type can be used in nanotechnology to prepare metamaterials for the far-UV region. It is shown by the example of an octahedron and a...
Article
The optimum form of a long helical molecule, which DNA is, has been calculated in terms of the classical electromagnetic theory. Three different methods of classical electrodynamics are used: the theory of dipole radiation of electromagnetic waves, the energetic power approach, and a helical model of molecules of chiral medium. In all three cases,...
Article
In this paper we study helical inclusions of a certain shape (called the “optimal shape”), such that the electric, magnetic, and magneto-electric polarizabilities are equal, and discuss unusual reflection properties of artificial materials based on such inclusions. We study helical particles with optimized design parameters, which can make the real...
Article
In this article we study helical inclusions of a certain shape (called the “optimal shape”), such that the electric, magnetic, and magneto-electric polarizabilities are equal, and discuss unusual refractive and absorptive properties of artificial chiral materials based on such inclusions. We propose a new method of analytical calculation of resonan...
Article
The possibility of linearly polarized electromagnetic microwave conversion into a circularly polarized wave using single-turn helices with preliminary calculated optimal parameters is demonstrated. The helices are characterized by equal dielectric, magnetic, and chiral susceptibilities. Such optimal helices can be further used, for example, to deve...
Article
Full-text available
In this article, we study spiral particles with optimized design parameters, which can make possible the realization of media with equal dielectric, magnetic, and chiral susceptibilities. Two different spiral structures are investigated: the canonical spiral (which consists of a split loop with two straight-wire sections, orthogonal to the loop pla...
Article
Transformation of the electromagnetic-wave polarization by a 2D grating of metal Ω elements is studied theoretically and experimentally. The electric dipole moment and magnetic moment excited by a linearly polarized incident wave in a single Ω element are determined. The parameters of an Ω element that are optimal for radiation of a circularly pola...
Article
Full-text available
Transformation of the polarization of an electromagnetic wave by a 2D array of double-turn metal helices is investigated both theoretically and experimentally. Electric and magnetic moments induced in an isolated helix by an incident linearly polarized wave are determined. A universal relationship between the projections of the induced moments onto...
Article
Interaction of the electromagnetic field with helical biological structures is studied theoretically by the example of deoxyribonucleic acid (DNA). A model that describes the mechanism of radiation of electromagnetic waves by an arbitrary section of the right-handed double helix of DNA is proposed. The model is based on the classical theory of dipo...
Article
The rotation of polarization plane of electromagnetic waves by the metallic helices is experimentally investigated. The object of investigation is electromagnetic waves scattered by the copper wire one-turn helices. Flat periodic structure consists of 1-turn helices placed on the radio transparent material that is manufactured. The helices are exci...
Article
The response of uniaxial bianisotropic slabs to obliquely incident electromagnetic waves is studied, and the exact solution of this boundary-value problem is derived. This includes the calculation of all characteristics of reflected and transmitted waves. The study is relevant to recent experimental studies of arrays of parallel spirals. The presen...
Chapter
A possibility to use the helical model of molecules for the description of interaction of electromagnetic waves with the artificial chiral media is shown. An analytical model, allowing to calculate electric dipole moment and magnetic moment, induced in the helix under the action of the incident electromagnetic wave, is formed. On the base of presen...