The performance of an acousto-optic deflector is studied for two-dimensional refractive index that varies as periodic and sinc functions in the transverse and longitudinal directions, respectively, with respect to the direction of light propagation. Phased array piezoelectric transducers can be operated at different phase shifts to produce a two-dimensionally inhomogeneous domain of phase grati...

We present a mock catalog of gravitationally lensed quasars at $z_\text{qso}<7.5$ with simulated images for the Rubin Observatory Legacy Survey Space and Time (LSST). adopt recent measurements quasar luminosity functions to model population, use CosmoDC2 galaxy deflector galaxies, which successfully reproduces observed velocity dispersion up $z_d\sim1.5$. The is highly complete Einstein radius ...

Metasurfaces have provided a novel and promising platform for realizing compact high-performance optical devices. The conventional metasurface design approach assumes periodic boundary conditions each element, which is inaccurate in most cases since near-field coupling effects between elements will change when the element surrounded by nonidentical structures. In this paper, deep learning propo...

A necessary condition for the qualitative solution of telecommunication, infocommunication and navigation tasks in satellite communication systems is presence a high-precision synchronization system radio channels. It indicated that operation data exchange channels adversely affected by number external factors, such as, example, Doppler effect, errors determining relative speeds directions move...

In the article, a mathematical model of movement water drop flying out nozzle with deflector during artificial rain was built. The resulting equations were solved by an approximate method using specially developed program at EHM. parameters affecting irrigation process analyzed based on obtained results.

Some high-performance imaging systems, including wide angle "monocentric" lenses made of concentric spherical shells, form a deeply curved image surface coupled to focal plane sensors by optical fiber bundles with a curved input and flat output face. However, refraction at the angled input facet limits the range of input angles, even for fiber bundles with numerical aperture 1. Here we investig...

In this paper, a novel polarization splitter has been designed at the telecommunication wavelength of 1500 nm successfully based on the dielectric metasurface consisting of a silicon nanobrick array, which can generate two different wavefronts for two orthogonal input polarizations with well over 90% transmitted efficiency by exactly selecting the sizes of the used nanobricks. The splitting mec...