Dmitry A. Bykov
YOU?
Author Swipe
View article: Fizeau fringes in wedged resonant gratings
Fizeau fringes in wedged resonant gratings Open
Fizeau fringes are pronounced asymmetric field distributions formed by wedged Fabry–Pérot interferometers also known as the Fizeau interferometers. In this paper, we show that similar effects arise in guided-mode resonant gratings with a w…
View article: Optical computation of the divergence of a vector field using a metal-dielectric multilayer
Optical computation of the divergence of a vector field using a metal-dielectric multilayer Open
We theoretically describe the optical computation of the divergence of a two-dimensional vector field, which is composed of the transverse electric field components of an incident light beam. The divergence is computed in reflection at obl…
View article: Optical computation of the divergence of a vector field using a metal-dielectric multilayer
Optical computation of the divergence of a vector field using a metal-dielectric multilayer Open
We theoretically describe the optical computation of the divergence of a two-dimensional vector field, which is composed by the transverse electric field components of an incident light beam. The divergence is computed in reflection at obl…
View article: Supporting quadric method for designing diffractive optical elements in the scalar diffraction theory framework
Supporting quadric method for designing diffractive optical elements in the scalar diffraction theory framework Open
We present a formulation of the supporting quadric method (SQM) taking into account diffraction effects and allowing one to calculate the phase function of a diffractive optical element (DOE) generating a prescribed intensity distribution.…
View article: Optical classification of images at different wavelengths using spectral diffractive neural networks
Optical classification of images at different wavelengths using spectral diffractive neural networks Open
A solution of several different problems of image classification at several different wavelengths using a diffractive neural network (DNN) consisting of sequentially located phase diffractive optical elements (DOEs) is considered. To solve…
View article: Gradient method for designing cascaded DOEs focusing radiation of different wavelengths
Gradient method for designing cascaded DOEs focusing radiation of different wavelengths Open
The design of cascaded diffractive optical elements (DOEs) generating several specified intensity distributions for several incident beams with different wavelengths is considered. The problem of designing a cascaded DOE is formulated as t…
View article: Design of Cascaded DOEs for Focusing Different Wavelengths to Different Points
Design of Cascaded DOEs for Focusing Different Wavelengths to Different Points Open
We propose a task-specific method for calculating cascaded phase diffractive optical elements (DOEs) for focusing Q incident beams with different wavelengths to Q given points. Due to the utilization of a special optimization criterion, th…
View article: Design of Diffractive Neural Networks for Solving Different Classification Problems at Different Wavelengths
Design of Diffractive Neural Networks for Solving Different Classification Problems at Different Wavelengths Open
We consider the problem of designing a diffractive neural network (DNN) consisting of a set of sequentially placed phase diffractive optical elements (DOEs) and intended for the optical solution of several given classification problems at …
View article: Topological properties of reflection zeros of optical differentiators based on layered metal-dielectric-metal structures
Topological properties of reflection zeros of optical differentiators based on layered metal-dielectric-metal structures Open
We investigate the topological properties of reflection zeros of three-layer structures consisting of a dielectric layer sandwiched between two metal layers, which can be used as optical differentiators. We show that the reflection zeros p…
View article: Designing robust diffractive neural networks with improved transverse shift tolerance
Designing robust diffractive neural networks with improved transverse shift tolerance Open
A wide range of practically important problems is nowadays efficiently solved using artificial neural networks. This gave momentum to intensive development of their optical implementations, among which, the so-called diffractive neural net…
View article: Second-order optical differentiation of a 3D light beam at oblique incidence using a multilayer metal-dielectric structure
Second-order optical differentiation of a 3D light beam at oblique incidence using a multilayer metal-dielectric structure Open
We investigate the optical implementation of a second-order differentiation operation using a metal-dielectric layered structure in the oblique incidence geometry. It is shown that the transformation of the profile of a three-dimensional l…
View article: A Solitary Stalled 80S Ribosome Prevents mRNA Recruitment to Stress Granules
A Solitary Stalled 80S Ribosome Prevents mRNA Recruitment to Stress Granules Open
In response to stress stimuli, eukaryotic cells typically suppress protein synthesis. This leads to the release of mRNAs from polysomes, their condensation with RNA-binding proteins, and the formation of non-membrane-bound cytoplasmic comp…
View article: How many parameters do we need to obtain a BIC in symmetric and asymmetric structures?
How many parameters do we need to obtain a BIC in symmetric and asymmetric structures? Open
Photonic bound states in the continuum (BICs) are nonradiating eigenmodes of structures with open scattering channels. Most often, BICs are studied in highly symmetric structures with one open scattering channel. In this simplest case, the…
View article: On-chip spatiotemporal optical vortex generation using an integrated metal-dielectric resonator
On-chip spatiotemporal optical vortex generation using an integrated metal-dielectric resonator Open
We theoretically demonstrate the possibility of generating a spatiotemporal optical vortex (STOV) beam in a dielectric slab waveguide. The STOV is generated upon reflection of a spatiotemporal optical pulse from an integrated metal-dielect…
View article: Design of Cascaded Diffractive Optical Elements for Optical Beam Shaping and Image Classification Using a Gradient Method
Design of Cascaded Diffractive Optical Elements for Optical Beam Shaping and Image Classification Using a Gradient Method Open
We present a gradient method for designing cascaded diffractive optical elements (DOEs) consisting of several sequentially located phase DOEs. Using the unitarity property of the operator of light propagation through the cascaded DOE, we o…
View article: Optical computation of the Laplace operator at oblique incidence using a multilayer metal-dielectric structure
Optical computation of the Laplace operator at oblique incidence using a multilayer metal-dielectric structure Open
We investigate the possibility of the optical computation of the Laplace operator in the oblique incidence geometry using a layered structure consisting of a set of homogeneous thin films. For this, we develop a general description of the …
View article: Lines of Quasi-BICs and Butterworth Line Shape in Stacked Resonant Gratings: Analytical Description
Lines of Quasi-BICs and Butterworth Line Shape in Stacked Resonant Gratings: Analytical Description Open
We propose analytical approximations of the reflection and transmission spectra of a stacked dielectric diffraction grating consisting of two identical resonant guided-mode gratings with a Lorentzian line shape. These approximations, deriv…
View article: Plasmonic Generation of Spatiotemporal Optical Vortices
Plasmonic Generation of Spatiotemporal Optical Vortices Open
We investigate the transformation of spatiotemporal optical signals using the Kretschmann configuration with an additional dielectric layer, which can be referred to as the “generalized Kretschmann setup”. We demonstrate that in the consid…
View article: Design of Multi-Wavelength Diffractive Lenses Focusing Radiation of Different Wavelengths to Different Points
Design of Multi-Wavelength Diffractive Lenses Focusing Radiation of Different Wavelengths to Different Points Open
We propose a method for calculating the so-called multi-wavelength diffractive lenses (MWDLs) intended for separating and focusing the radiation of L given wavelengths to L given points located in a certain plane perpendicular to the optic…
View article: Support quadric method in non-imaging optics problems that can be reformulated as a mass transfer problem
Support quadric method in non-imaging optics problems that can be reformulated as a mass transfer problem Open
The article deals with problems of generating desired illumination patterns, formulated in a special way. More precisely, we consider problems that can be reformulated as a Monge–Kantorovich mass transfer problem with some cost function. F…
View article: Structural and optical properties of thin CdTe films in the visible and infrared regions
Structural and optical properties of thin CdTe films in the visible and infrared regions Open
CdTe thin films have been deposited by thermal evaporation on heated glass substrates. Structural properties of the CdTe thin films were studied by scanning electron microscopy and Raman spectroscopy. Optical properties were examined by el…
View article: 1D quasi-bound states in the continuum with large operation bandwidth in the <i>ω</i>∼<i>k</i> space for nonlinear optical applications
1D quasi-bound states in the continuum with large operation bandwidth in the <i>ω</i>∼<i>k</i> space for nonlinear optical applications Open
The phenomenon of bound state in the continuum (BIC) with an infinite quality factor and lifetime has emerged in recent years in photonics as a new tool to manipulate light–matter interactions. However, most of the investigated structures …
View article: Method for calculating the eikonal function and its application to design of diffractive optical elements for optical beam shaping
Method for calculating the eikonal function and its application to design of diffractive optical elements for optical beam shaping Open
We develop a method for calculating the eikonal function (or the phase function) of the light field, ensuring the formation of a prescribed irradiance distribution in the geometrical optics approximation. In the proposed method, the proble…
View article: Supporting Quadric Method for Designing Freeform Mirrors That Generate Prescribed Near-Field Irradiance Distributions
Supporting Quadric Method for Designing Freeform Mirrors That Generate Prescribed Near-Field Irradiance Distributions Open
We consider a version of the supporting quadric method for designing freeform mirrors that generate prescribed irradiance distributions in the near field. The method is derived for a general case of an incident beam with an arbitrary wavef…
View article: Method for calculating a refractive optical element forming given illuminance distribution and wavefront
Method for calculating a refractive optical element forming given illuminance distribution and wavefront Open
In the geometrical optics approximation, we consider a method for calculating a refractive optical element with two freeform surfaces, which transforms an incident beam with a plane wave-front into an output beam with a required wavefront …
View article: High-Q two-groove resonator for all-dielectric Bloch surface wave platform
High-Q two-groove resonator for all-dielectric Bloch surface wave platform Open
We propose a simple integrated resonant structure for the Bloch surface wave platform, which consists of two subwavelength grooves patterned on the surface of a one-dimensional dielectric photonic crystal. We demonstrate that the investiga…
View article: Exceptional points in composite structures consisting of two dielectric diffraction gratings with Lorentzian line shape
Exceptional points in composite structures consisting of two dielectric diffraction gratings with Lorentzian line shape Open
Using scattering matrix formalism we derive analytical expressions for the eigenmodes of a composite structure consisting of two dielectric diffraction gratings with Lorentzian profile in reflection. Analyzing these expressions we prove fo…
View article: Integrated high-contrast diffraction gratings for surface electromagnetic waves
Integrated high-contrast diffraction gratings for surface electromagnetic waves Open
We propose and theoretically and numerically investigate integrated high-contrast diffraction gratings for surface electromagnetic waves. We consider two platforms for the on-chip gratings: surface plasmon-polaritons propagating along meta…
View article: Integrated diffraction gratings on the Bloch surface wave platform supporting bound states in the continuum
Integrated diffraction gratings on the Bloch surface wave platform supporting bound states in the continuum Open
We propose and theoretically and numerically investigate integrated diffraction gratings for the Bloch surface wave (BSW) platform, which have subwavelength or near-subwavelength period. We demonstrate that, in the oblique incidence geomet…
View article: Hybrid design of diffractive optical elements for optical beam shaping
Hybrid design of diffractive optical elements for optical beam shaping Open
Hybrid methods combining the geometrical-optics and diffraction-theory methods enable designing diffractive optical elements (DOEs) with high performance due to the suppression of stray light and speckles and, at the same time, with a regu…