Papers by Alexey Kucherik
Crystallography Reports, 2018
The physical properties of solid structures depending on the boundary conditions in topologically... more The physical properties of solid structures depending on the boundary conditions in topologically ordered nanocluster systems are discussed. These systems are synthesized using various laser methods in the form of metal/semiconductor nanostructures/nanoclusters and thin films on solid substrates. A particular attention is paid to the possible mechanisms and tendency to high-temperature superconductivity in these thin-film nanocluster structures.
Optical and Quantum Electronics, 2016
The synthesis of nanostructured metal-carbon materials by laser irradiation is an actual branch o... more The synthesis of nanostructured metal-carbon materials by laser irradiation is an actual branch of laser physics and nanotechnology. Laser sources with different pulse duration allow to change the heating rate with realization of different transition scenarios and synthesis materials with various physical properties. We study the process of the formation of nanostructured metal-carbon clusters and complexes using laser irradiation of colloidal systems which have been consisted of carbon micro-nanoparticle and nanoparticle of noble metals. For carbon nanoparticle synthesis we use the method of laser ablation in liquid. For the realization of different regimes of laser surface modification of the target (glassycarbon and shungite) and the formation of micro-nanoparticle in a liquid the This article is part of the Topical Collection on Laser technologies and laser applications. Guest Edited by Jose ´Figueiredo, Jose ´Rodrigues, Nikolai A. Sobolev, Paulo Andre ´and Rui Guerra.
AIP Conference Proceedings, 2017
Quantum Electronics, 2007
We fabricated high-mesa waveguides consisting of Al 0:1 Ga 0:9 N cladding layers and an AlN/GaN m... more We fabricated high-mesa waveguides consisting of Al 0:1 Ga 0:9 N cladding layers and an AlN/GaN multiple quantum well core layer using inductively coupled plasma dry etching. Suitable conditions for vertically abrupt profiles were determined with an excellent reproducibility by optimizing the ICP power, bias power, gas pressure, and gas component. The etching selectivity of the samples to the SiO 2 mask was 10, which is larger than previously reported values. Light propagation at 1.55 mm in the waveguides was also confirmed.
Optical and Quantum Electronics, 2020
Functional physical properties of laser-induced nanocluster structures of different topology in t... more Functional physical properties of laser-induced nanocluster structures of different topology in the thin films deposited on solid surface and 3D-crystallic structures by femto-nanoexperiments are studied. Physical basis and specific topology nanocluster view are under our consideration with regard to the functional properties variation (electrophysics + optics) in granular structures. Modeling of electronic energy levels modification due to the topology factors and nonlinear dynamic model for coupled electronic states in the cluster system are carried out. New physical principles for possible application of such structures of topological photonics with different element compositions are discussed. Femto-nanophotonics • Laser-induced nanoclusters • 2D-3D-topology structures • Controllable functional properties of the objects This article is part of the Topical Collection on Fundamentals of Laser Assisted Micro-and Nanotechnologies.
Bulletin of the Russian Academy of Sciences: Physics
2018 International Conference Laser Optics (ICLO), 2018
The formation of hybrid silicon-gold NPs as a result of the laser action on a mixed colloidal sol... more The formation of hybrid silicon-gold NPs as a result of the laser action on a mixed colloidal solution is observed. These hybrid NPs are characterized by the amplification and broadening of the near-field photoluminescence spectra compared to pure silicon NPs. A strong sensitivity of the spectral shape of the emitted light to the intensity of the exciting white light is documented. These results may be used for the realization of functional metasurfaces consisting of randomly distributed resonant NPs. Moreover, as the synthesized NPs emit in red, green and yellow they can be used for fabrication of luminescent color screens.
2016 International Conference Laser Optics (LO), 2016
In this work a method for the laser formation of C-Au-Ag clusters and complexes on the surface of... more In this work a method for the laser formation of C-Au-Ag clusters and complexes on the surface of an optically transparent media is discussed.
2018 International Conference Laser Optics (ICLO), 2018
Metal-carbon materials realize surface-enhanced Raman scattering. Such structures were synthesize... more Metal-carbon materials realize surface-enhanced Raman scattering. Such structures were synthesized using the laser irradiation of colloidal systems consisting of carbon and noble metal nanoparticles.
2017 Progress In Electromagnetics Research Symposium - Spring (PIERS), 2017
The drop deposition of colloidal nanoparticles was performed from water-based colloidal solutions... more The drop deposition of colloidal nanoparticles was performed from water-based colloidal solutions. The proposed procedure is based on the agglomeration of colloidal particles in evaporation processes. The evaporation process was resulted in the formation of clustered thin films on a glass substrate. In the experiments with bimetallic Au:Ag solutions, the clustered films are grown, the formation of the clustered films with the average height of 100 nm was achieved. Optical properties of the deposited structures were investigated experimentally. It is shown that the obtained films may become transparent and their properties are defined by their morphology.
Journal of Physics: Conference Series, 2019
This article presents the results of experimental studies on obtaining and measuring the electron... more This article presents the results of experimental studies on obtaining and measuring the electronically conductive properties of island semiconductor plumbum telluride nanofilms, as well as modeling their conductive properties within the hopping conductivity model and the classical model taking into account the structure within the DLA model using graph theory methods.
Journal of Physics: Conference Series, 2019
Titanium oxide films are photosensitive they have unusual optical properties. This article repres... more Titanium oxide films are photosensitive they have unusual optical properties. This article represents the possibility of the TiO objects (rolls) obtaining with predetermined optical parameters. The article also includes the comparison between numerical and physical experiments.
IOP Conference Series: Materials Science and Engineering, 2020
We used the nonlinear hydrodynamic model of the motion of molten flows to determine the basic geo... more We used the nonlinear hydrodynamic model of the motion of molten flows to determine the basic geometric characteristics of the resulting coatings in a laser experiment. To test the capabilities of the developed algorithm, a series of calculations was performed for various values of Reynolds numbers (Re) and certain sizes of the computational domains with several cavities with different configurations. The influence of the channel geometry is clearly noticeable in the case of a deep depression. The direction of motion of different structures (e.g. the vortex) was predicted. Using the convection model, we estimate the temperature field and velocity distribution in the system under consideration for various initial conditions and experimental regimes selected. The profile of the arising island on the surface was modeled by a scaling computational domain with the number of particles N = pS, where the parameter p – determined the viscosity of melted material, and S - the area of the comp...
Journal of Physics: Conference Series, Nov 1, 2019
<jats:title>Abstract</jats:title> <jats:p>In the framework of this paper, the r... more <jats:title>Abstract</jats:title> <jats:p>In the framework of this paper, the results of experimental studies on the production of thin labyrinth bimetallic films, as well as measurement of ampere characteristics from volts, are presented. In addition, the simulation of their electrically conductive properties is done.</jats:p>
Journal of Physics: Conference Series, 2018
Metal-carbyne materials, synthesized by laser irradiation of colloidal systems consisting of carb... more Metal-carbyne materials, synthesized by laser irradiation of colloidal systems consisting of carbon and noble metal nanoparticles, are promising objects to realize surfaceenhanced Raman scattering. The dependence of the Raman scattering intensity of the material composition has been investigated. The possibility of detecting of the organic dye Rhodamine 6G Raman spectrum was demonstrated.
Optical and Quantum Electronics, 2017
By method of laser-induced thermal deposition of colloidal particles laser we have produced the m... more By method of laser-induced thermal deposition of colloidal particles laser we have produced the metallic granular films for which the ability to control the change in its electrical properties does exist by variation of the topology for the system. The quantum states verification in cluster metallic structures by jump/tunneling electroconductivity and possible mechanisms for its implementation are considered in experiment and theory. The granular conductivity specificity has been under study. The current-voltage characteristics behavior has been measured for a gold (Au) and Au-carbyne clustered film. Two associated mechanisms for electroconductivity occur in the case, i.e. tunnel transition for electrons and electron activation in the frames of the shell model for a cluster system, in dependence on the nanostructure topology. Keywords Electroconductivity Á Tunneling Á Nanocluster structures Á Jump electroconductivity Á Topology control This article is part of the Topical Collection on Fundamentals of Laser Assisted Micro-and Nanotechnologies.
Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques, 2015
We present the experimental and theoretical results of the study of laser modification of the sol... more We present the experimental and theoretical results of the study of laser modification of the solid phase of thin epitaxial films of lead telluride under continuous irradiation. An ensemble of nanoparticles with bimodal distribution depending on the laser power, beam diameter, and scanning rate of the surface is formed under laboratory conditions The process of the laser heating of a thin film is simulated, and the change in the temperature field, depending on the conditions of laser exposure, is described. The experimental results are interpreted based on the defect–deformation theory of the formation of a bimodal ensemble of nanoparticles under continuous laser irradiation. The diffusion model of cluster growth in the bulk and on the surface of a thin film demonstrates the possibility of forming a bimodal size distribution of clusters.
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Papers by Alexey Kucherik