3 papers
physics.optics2019
Optical-vortex diagnostics via Fraunhofer slit diffraction with controllable wavefront curvature
A. Bekshaev, L. Mikhaylovskaya, S. Patil +2
Far-field slit-diffraction of circular optical-vortex (OV) beams is efficient for measurement of the topological charge (TC) magnitude but does not reveal its sign. We show that th…
physics.optics2019
Transformation of the singular skeleton in optical-vortex beams diffracted by a rectilinear phase step
Aleksandr Bekshaev, Anna Khoroshun, Lidiya Mikhaylovskaya
Based on the Kirchhoff-Fresnel approximation, we numerically analyze spatial characteristics of the light field formed after a circular Laguerre-Gaussian beam with a single-charged…
physics.optics2018
Electromagnetic dynamical characteristics of a surface plasmon-polariton
Aleksandr Bekshaev, Lidiya Mikhaylovskaya
We consider the electromagnetic field near an interface between two media with arbitrary real frequency-dependent permittivities and permeabilities, under conditions supporting the…