Zobrazeno 1 - 10
of 190
pro vyhledávání: '"A.G. Nalimov"'
Autor:
A.G. Nalimov, V.V. Kotlyar
Publikováno v:
Компьютерная оптика, Vol 47, Iss 2, Pp 201-207 (2023)
A combined high-aperture metalens in a thin silicon nitride film, which consists of two inclined sector metalens, is considered. Each sector metalens consists of a set of binary subwavelength gratings. The diameter of the lens is 14 μm. It has been
Externí odkaz:
https://doaj.org/article/04d72cbdb1ba4ec69f3d48b941f1d4b1
Publikováno v:
Компьютерная оптика, Vol 47, Iss 2, Pp 208-214 (2023)
An optical microsensor of the laser light polarization state based on a metalens is proposed. Well-known polarization sensors based on metasurfaces usually transmit different types of polarization at different angles to the optical axis. The polariza
Externí odkaz:
https://doaj.org/article/4a0afba1f2074b06af9eb4b6e05338c1
Publikováno v:
Компьютерная оптика, Vol 46, Iss 4, Pp 522-530 (2022)
It is shown theoretically that an astigmatic transformation of an edge dislocation (straight line of zero intensity) of the ν-th order (ν=n+α is a real positive number, n is integer, 0
Externí odkaz:
https://doaj.org/article/e30a4ba432414590982e288e54fc24d4
Publikováno v:
Компьютерная оптика, Vol 46, Iss 3, Pp 366-374 (2022)
Topological charges (TC) of a superposition of two Laguerre-Gauss (LG) beams (0,m) and (0,n) symmetrically shifted from the optical axis are found in this work. It is shown that if m=n, then the TC of the superposition is equal to n. That is, two ide
Externí odkaz:
https://doaj.org/article/98ea82d5587e46b5a0dcf8a660dcc385
Autor:
A.G. Nalimov, V.V. Kotlyar
Publikováno v:
Компьютерная оптика, Vol 46, Iss 2, Pp 189-195 (2022)
In this work, using the Rayleigh-Sommerfeld integral and the Berry formula, the topological charge (TC) of a Gaussian optical vortex with an initial fractional TC is calculated. It is shown that for different fractional parts of the TС, the beam con
Externí odkaz:
https://doaj.org/article/e5bd1bae1bd449a786c901b13decffe9
Publikováno v:
Компьютерная оптика, Vol 45, Iss 6, Pp 800-808 (2021)
We discuss the sharp focusing of an initial hybrid vector light field of the n-th order that has n C-lines (lines along which the polarization is circular). Using a complex Stokes field, it is shown that the polarization singularity index of such a f
Externí odkaz:
https://doaj.org/article/f99d534fbad54727bef42018e625f2e3
Publikováno v:
Компьютерная оптика, Vol 45, Iss 6, Pp 809-817 (2021)
We discuss paraxial light beams composed of decentered Gaussian beams, with their phase selected in a special way so that their superposition is invariant as it propagates in free space, retaining its cross-section shape. By solving a system of five
Externí odkaz:
https://doaj.org/article/de1674af880b49aa9f24c0b11782ca97
Publikováno v:
Компьютерная оптика, Vol 45, Iss 5, Pp 643-653 (2021)
It is theoretically and numerically shown that when tightly focusing an n-th order vector light field that has the central V-point (at which the linear polarization direction is undetermined), the polarization singularity index n, and a "flower"-shap
Externí odkaz:
https://doaj.org/article/218029094b294deaad940affd1a8eab7
Publikováno v:
Компьютерная оптика, Vol 45, Iss 5, Pp 654-660 (2021)
In this paper, we summarize a remarkable result obtained by Soskin et al. in Phys Rev A 56, 4064 (1997). We show that for an on-axis superposition of two different-waist Laguerre-Gauss beams with numbers (0, n) and (0, m), the topological charge equa
Externí odkaz:
https://doaj.org/article/afee4706fca64fde953db6f112cdd286
Publikováno v:
Компьютерная оптика, Vol 45, Iss 3, Pp 319-323 (2021)
We theoretically show that an astigmatic transformation of an nth-order edge dislocation (a zero-intensity straight line) produces n optical elliptical vortices (spiral dislocations) with unit topological charge at the double focal distance from the
Externí odkaz:
https://doaj.org/article/65e1a320e32d4ce997a6b5e9b90d6dee