We suggest vortex phase elements to detect the polarization state of the focused incident
beam. We analytically and numerically show that only the types of polarization (linear …

We analytically and numerically show that by introducing asymmetry into axicon design it
becomes possible to generate the longitudinal E-field component on the optical axis for …

Diffraction of uniformly polarized laser beams with vortex phase singularity is theoretically
analyzed using the plane wave expansion. It is shown that for a high numerical aperture, an …

We demonstrate the possibility of generating a photonic nanojet with a helix shape (photonic
nanohelix) at the diffraction of a Gaussian beam on a binary spiral axicon. We investigate …

Reliable laser imaging is crucial to the autonomous driving. In unfavorable weather
condition, however, it always suffers from the acute background noise and signal attenuation …

We investigate the inter-relation of the phase and polarisation singularities in systems with
high numerical aperture. We consider sharp focusing by means of three types of systems: a …

SN Khonina, AV Ustinov, SG Volotovsky, “Comparison of focusing of short pulses in the Debye
approximation”, Computer Optics, 42:3 (2018), 432–446 Computer Optics RUS ENG …

We analyze the diffraction of the laser beam with a vortex phase singularity on the basis of
the finite-difference time-domain method (FDTD). It is shown that, when incident beam has …

We have considered the effect of the fill factor of an annular binary phase grating on the
energy distribution in the focal plane. A theoretical analysis is carried out, using two …

AV Ustinov, SN Khonina, “Analysis of laser beam diffraction by axicon with the numerical
aperture above limiting”, Computer Optics, 38:2 (2014), 213–222 Computer Optics RUS ENG …