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Papers by Nikolay Kazanskiy

Research paper thumbnail of Study of the Formation of Zinc Oxide Nanowires on Brass Surface After Pulse-Periodic Laser Treatment

Lecture notes in mechanical engineering, Nov 11, 2021

Research paper thumbnail of Softening of Low-alloyed Titanium Billets with Laser Annealing

IOP conference series, 2018

Research paper thumbnail of Laser beam shaping for modification of materials with ferritic-martensitic structure

Procedia Engineering, 2017

Research paper thumbnail of Synthesis of nanoporous structures in metallic materials under laser action

Optics and Lasers in Engineering, Nov 1, 2011

Research paper thumbnail of Simulation of a hyperspectrometer based on linear spectral filters using vector bessel beams

Research paper thumbnail of Exploring Types of Photonic Neural Networks for Imaging and Computing—A Review

Nanomaterials, Apr 17, 2024

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY

Research paper thumbnail of Numerical Simulation of Vibration-Related Deformation of a Railway Locomotive Headlight: Visualization of the Results

Research paper thumbnail of Use of diffractive optical elements for beam intensity redistribution

The use of diffractive optical elements (DOEs) opens up new possibilities for controlling the bea... more The use of diffractive optical elements (DOEs) opens up new possibilities for controlling the beam shape and the beam intensity distribution for optical telecommunication systems. To increase the beam intensity at peripheries of the laser spot, it is necessary to redistribute the energy portion from the center of the optical element to those areas that are designed to operate under conditions of an exponentially low intensity. This is achieved by using laser beam with a ring distribution of flow intensity. For this case, regularities of the power redistribution of formed laser beams into a line segment, as well as changes in the focus distance and focal length when changing the spatial position of the diffractive optical element are established. The spatial distribution of intensity in the laser spot was measured with the application of CO2 laser. Results of experimental studies correlate well with the calculated data.

Research paper thumbnail of Silicon photonic devices realized on refractive index engineered subwavelength grating waveguides-A review

Optics and Laser Technology, Jun 1, 2021

Abstract It is a remarkable and straightforward approach to customize the dispersion and nonlinea... more Abstract It is a remarkable and straightforward approach to customize the dispersion and nonlinear properties of the photonic devices without varying the composition of the material by employing periodic segmented waveguide structures at the subwavelength level of the operational wavelength. This method addresses the diffraction limit and it is likely to engineer the waveguides as a uniform optical medium with an effective refractive index that relies on the waveguide geometry. In recent years, advances in lithographic technology in the semiconductor-on-insulator platform providing sub-100-nm patterning resolution have been renowned with many useful devices based on subwavelength structures. At the beginning of the paper, the modal characteristics of the subwavelength grating (SWG) waveguides are presented. And in afterwards, we provide an insight into noteworthy progress in the subwavelength grating (SWG) waveguides based devices for signal processing and sensing applications such as ring resonators for surface and bulk sensing, couplers, suspended membrane waveguides for mid-infrared applications, filters, and fiber-to-chip couplers.

Research paper thumbnail of The two reflector design problem for forming a flat wavefront from a point source as an optimal mass transfer problem

Computer Optics, Dec 1, 2019

Research paper thumbnail of Analysis of structural features of a LED searchlight

Journal of physics, Sep 1, 2018

Research paper thumbnail of Testing of diffractive optical element as part of specific CO<sub>2</sub> laser equipment for metallic materials modification

Journal of physics, Nov 1, 2019

Research paper thumbnail of Application of photonic-crystal coupled cavities for increase in sensitivity of optical sensor

Optical Memory and Neural Networks, 2016

Research paper thumbnail of Active photonic crystal cavities for optical signal integration

Optical Memory and Neural Networks, Oct 1, 2015

Research paper thumbnail of Laser beam shaping with purposefully changing of spatial power distribution

Regularities of laser beam power redistribution with a change of the spatial position of the diff... more Regularities of laser beam power redistribution with a change of the spatial position of the diffractive optical element (DOE) was determined, as well as changes the focal distance and the length of the focal line segment at the change of spatial position of the DOE. The performed theoretical and experimental researches allow realizing the laser beam generation with purposefully changing spatial power distribution. Measurement of the spatial intensity distribution in the laser spot was conducted with using a СО2 laser Hebar-1A. The use of DOE as components of optical systems allows changing the shape of the laser beam and the beam intensity distribution over time.

Research paper thumbnail of Polymer Waveguide-Based Optical Sensors—Interest in Bio, Gas, Temperature, and Mechanical Sensing Applications

Research paper thumbnail of Miniaturized Design of a 1 × 2 Plasmonic Demultiplexer Based on Metal–Insulator-Metal Waveguide for Telecommunication Wavelengths

Research paper thumbnail of On a silicon-based photonic-crystal cavity for the near-IR region: Numerical simulation and formation technology

Semiconductors, Aug 1, 2016

Research paper thumbnail of Specific features of the laser irradiation of thin molybdenum films

Technical Physics, Apr 1, 2016

Laser irradiation of thin molybdenum films with a thickness of less than 100 nm is studied. An ex... more Laser irradiation of thin molybdenum films with a thickness of less than 100 nm is studied. An experimental hypothesis in accordance with which films of refractory metals can be laser-ablated owing to the formation of an intermediate oxide phase is experimentally proven. A threefold decrease in the thickness of the ablation region under the action of scanning laser radiation is interpreted.

Research paper thumbnail of Spectral-spatial classification of hyperspectral images with k-means++ partitional clustering

Proceedings of SPIE, Mar 25, 2015

Research paper thumbnail of Study of the Formation of Zinc Oxide Nanowires on Brass Surface After Pulse-Periodic Laser Treatment

Lecture notes in mechanical engineering, Nov 11, 2021

Research paper thumbnail of Softening of Low-alloyed Titanium Billets with Laser Annealing

IOP conference series, 2018

Research paper thumbnail of Laser beam shaping for modification of materials with ferritic-martensitic structure

Procedia Engineering, 2017

Research paper thumbnail of Synthesis of nanoporous structures in metallic materials under laser action

Optics and Lasers in Engineering, Nov 1, 2011

Research paper thumbnail of Simulation of a hyperspectrometer based on linear spectral filters using vector bessel beams

Research paper thumbnail of Exploring Types of Photonic Neural Networks for Imaging and Computing—A Review

Nanomaterials, Apr 17, 2024

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY

Research paper thumbnail of Numerical Simulation of Vibration-Related Deformation of a Railway Locomotive Headlight: Visualization of the Results

Research paper thumbnail of Use of diffractive optical elements for beam intensity redistribution

The use of diffractive optical elements (DOEs) opens up new possibilities for controlling the bea... more The use of diffractive optical elements (DOEs) opens up new possibilities for controlling the beam shape and the beam intensity distribution for optical telecommunication systems. To increase the beam intensity at peripheries of the laser spot, it is necessary to redistribute the energy portion from the center of the optical element to those areas that are designed to operate under conditions of an exponentially low intensity. This is achieved by using laser beam with a ring distribution of flow intensity. For this case, regularities of the power redistribution of formed laser beams into a line segment, as well as changes in the focus distance and focal length when changing the spatial position of the diffractive optical element are established. The spatial distribution of intensity in the laser spot was measured with the application of CO2 laser. Results of experimental studies correlate well with the calculated data.

Research paper thumbnail of Silicon photonic devices realized on refractive index engineered subwavelength grating waveguides-A review

Optics and Laser Technology, Jun 1, 2021

Abstract It is a remarkable and straightforward approach to customize the dispersion and nonlinea... more Abstract It is a remarkable and straightforward approach to customize the dispersion and nonlinear properties of the photonic devices without varying the composition of the material by employing periodic segmented waveguide structures at the subwavelength level of the operational wavelength. This method addresses the diffraction limit and it is likely to engineer the waveguides as a uniform optical medium with an effective refractive index that relies on the waveguide geometry. In recent years, advances in lithographic technology in the semiconductor-on-insulator platform providing sub-100-nm patterning resolution have been renowned with many useful devices based on subwavelength structures. At the beginning of the paper, the modal characteristics of the subwavelength grating (SWG) waveguides are presented. And in afterwards, we provide an insight into noteworthy progress in the subwavelength grating (SWG) waveguides based devices for signal processing and sensing applications such as ring resonators for surface and bulk sensing, couplers, suspended membrane waveguides for mid-infrared applications, filters, and fiber-to-chip couplers.

Research paper thumbnail of The two reflector design problem for forming a flat wavefront from a point source as an optimal mass transfer problem

Computer Optics, Dec 1, 2019

Research paper thumbnail of Analysis of structural features of a LED searchlight

Journal of physics, Sep 1, 2018

Research paper thumbnail of Testing of diffractive optical element as part of specific CO<sub>2</sub> laser equipment for metallic materials modification

Journal of physics, Nov 1, 2019

Research paper thumbnail of Application of photonic-crystal coupled cavities for increase in sensitivity of optical sensor

Optical Memory and Neural Networks, 2016

Research paper thumbnail of Active photonic crystal cavities for optical signal integration

Optical Memory and Neural Networks, Oct 1, 2015

Research paper thumbnail of Laser beam shaping with purposefully changing of spatial power distribution

Regularities of laser beam power redistribution with a change of the spatial position of the diff... more Regularities of laser beam power redistribution with a change of the spatial position of the diffractive optical element (DOE) was determined, as well as changes the focal distance and the length of the focal line segment at the change of spatial position of the DOE. The performed theoretical and experimental researches allow realizing the laser beam generation with purposefully changing spatial power distribution. Measurement of the spatial intensity distribution in the laser spot was conducted with using a СО2 laser Hebar-1A. The use of DOE as components of optical systems allows changing the shape of the laser beam and the beam intensity distribution over time.

Research paper thumbnail of Polymer Waveguide-Based Optical Sensors—Interest in Bio, Gas, Temperature, and Mechanical Sensing Applications

Research paper thumbnail of Miniaturized Design of a 1 × 2 Plasmonic Demultiplexer Based on Metal–Insulator-Metal Waveguide for Telecommunication Wavelengths

Research paper thumbnail of On a silicon-based photonic-crystal cavity for the near-IR region: Numerical simulation and formation technology

Semiconductors, Aug 1, 2016

Research paper thumbnail of Specific features of the laser irradiation of thin molybdenum films

Technical Physics, Apr 1, 2016

Laser irradiation of thin molybdenum films with a thickness of less than 100 nm is studied. An ex... more Laser irradiation of thin molybdenum films with a thickness of less than 100 nm is studied. An experimental hypothesis in accordance with which films of refractory metals can be laser-ablated owing to the formation of an intermediate oxide phase is experimentally proven. A threefold decrease in the thickness of the ablation region under the action of scanning laser radiation is interpreted.

Research paper thumbnail of Spectral-spatial classification of hyperspectral images with k-means++ partitional clustering

Proceedings of SPIE, Mar 25, 2015