A5014455642- Photonic Crystals and Applications
- Photonic and Optical Devices
- Liquid Crystal Research Advancements
- Semiconductor Lasers and Optical Devices
- Optical Coatings and Gratings
- Optical Polarization and Ellipsometry
- Laser Design and Applications
- Solid State Laser Technologies
- Photorefractive and Nonlinear Optics
- Advanced Fiber Optic Sensors
- Fern and Epiphyte Biology
- Metamaterials and Metasurfaces Applications
- Photonic Crystal and Fiber Optics
- Plant and animal studies
- Advanced Biosensing Techniques and Applications
- Biosensors and Analytical Detection
- SARS-CoV-2 detection and testing
- Optical Systems and Laser Technology
- Advanced Optical Imaging Technologies
- Quantum optics and atomic interactions
- Magneto-Optical Properties and Applications
- Thermography and Photoacoustic Techniques
- Molecular Communication and Nanonetworks
- Plasmonic and Surface Plasmon Research
- Advanced Thermodynamics and Statistical Mechanics
Far Eastern Federal University
2021-2024
Moscow Institute of Physics and Technology
2019-2020
Institute of Physics and Technology
2019
A new approach to determining the sensitivity of refractive index sensors is proposed. It has been shown that relative and absolute show different results, also, for first time, it demonstrated advantages over sensitivity. In addition, influence width photonic band gap difference in indices layers on are examined corresponding dependences these parameters obtained. We propose as a convenient tool optimizing based defective crystals. Finally, results obtained regarding behavior defect mode at...
Abstract In this paper, we investigated the possibility of using defect modes (DMs) in second photonic bandgap (PBG) defective one dimensional (1D) crystals (PCs) for creating optical sensors. The dependencies relative sensitivities on layer (DL) thickness first and PBGs at optimized PC parameters are obtained compared advantage PBG over all ranges DL is shown. However, as order mode (DM) contrast structure increase, becomes less prominent. behavior DMs their sensitivity outside when changes...
We propose a new optical biosensor based on photonic crystal with defect layer, which can determine the SARS-CoV-2 concentration in water by mode shift. Two models of dependence refractive index layer pathogen were considered. The optimal parameters for our device and thickness determined. It was also demonstrated that presence absorption investigated structure it is much more advantageous to work reflection compared transmission mode. Finally, wavelength obtained sensitivity sensor
We propose an improved structure of optical biosensor based on a photonic crystal with defect layer, which can detect the concentration organic contaminants in water by mode shift. investigated 4 types defective crystals different arrangements layers inside perfect and their impact performance sensor. The sensitivity amplitude were examined as function layer thickness. Also, peculiarities edge modes presence investigated. Finally, we obtained characteristic equation to determine wavelengths...
In our paper, the magneto-optical properties of a dichroic cholesteric liquid crystal layer with large values parameter g and low dielectric permittivity were investigated. The solutions dispersion equation their peculiarities investigated in detail. specific reflection, transmission, absorption, rotation, ellipticity spectra also azimuth eigen polarization existence tunable linear nonreciprocal transmission band was shown.
In this paper, we investigate the light absorption in helically structured photonic crystals (HSPCs) an external static magnetic field case when parameter of magneto-optical activity is a function wavelength. We and compare spectra absorption, imaginary parts wave vectors forward propagating eigenwaves, azimuth φ ellipticity e total excited HSPC layer at its input surface for diffracting eigenwaves both absence presence and, finally, absorption. All features are considered detail, their...
Abstract In this paper, an analytical formula for the sensitivity of optical sensors based on one-dimensional photonic crystals (PCs) with a defect was derived first time. Based formula, comparative analysis defected PCs and without mirror symmetry carried out. addition, exact values in limit infinite PC quarter-wave unit cell were obtained. It shown that defective infinitely thick layer is equal to perfectly reflecting Fabry–Perot resonator does not depend specific structure PC. The results...
We investigated the properties of linear and circular dichroisms cholesteric liquid crystal layer in external static magnetic field directed along helix axis. showed that when direction light propagation coincide, increasing latter magnitude leads to a decrease dichroism, whereas these directions are opposite, (Bext) an increase dichroism. The presence shift dichroism curves both wavelength axis Then, we peculiarities dependencies on Bext for different wavelengths incident light. compared...
In this paper, an analytical formula for the sensitivity of optical sensors based on one-dimensional photonic crystals (PCs) with a defect was derived first time. Based formula, comparative analysis defected PCs and without mirror symmetry carried out. addition, exact values in limit infinite PC quarter-wave unit cell were obtained. It shown that defective infinitely thick layer is equal to perfectly reflecting Fabry-Perot resonator does not depend specific structure PC. The results work...
We investigated the light reflection from half-space of cholesteric liquid crystal (CLC) being in external static magnetic field directed along helix axis at normal incidence. In this case there appear three photonic band gaps (PBGs) and these bands can be tuned large intervals. found eigenpolarizations (EPs) their peculiarities. have shown that absence both absorption minimal influence dielectric boundary (when permittivity isotropic which borders with CLC is equal to CLC's mean...
In this paper, for the first time, analytical expressions determination of wavelength defect modes (DMs) in one-dimensional (1D) photonic crystals (PCs) with two layers (DLs) were obtained from condition zero reflection. Analytical formulas on conditions merging DMs and value reflection coefficient obtained. Different typical 1D PC structures DLs considered compared, including their behavior. The distribution electromagnetic field within bandgap (PBG) was analyzed several cases DM different...