Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Sergey Stafeev"'
Publikováno v:
Photonics, Vol 10, Iss 6, p 690 (2023)
We propose a simple optical method and device design for the non-contact determination of small shift, thickness, refractive index, and tilt angle of thin films. The proposed sensor consists of a laser light source, a third- or two-order spiral ampli
Externí odkaz:
https://doaj.org/article/11d166bbd7334f4eb8c2be324c5bd8a4
Publikováno v:
Компьютерная оптика, Vol 44, Iss 1, Pp 5-11 (2020)
Using Richards-Wolf formulas, we show that an axisymmetric circularly polarized vortex-free field can be focused into a sharp subwavelength focal spot, around which there is a region where the light energy flow propagates along a spiral. This effect
Externí odkaz:
https://doaj.org/article/81884002882146b1b7fa2f70086d14a9
Publikováno v:
Компьютерная оптика, Vol 44, Iss 1, Pp 29-33 (2020)
In this paper, we numerically simulate the focusing of a second-order cylindrical vector beam with a gradient index Mikaelian lens. It is shown that the lens forms a region of the reverse energy flow near its output surface. If the lens has an on-axi
Externí odkaz:
https://doaj.org/article/8bdcca7748274a2bb7d29a620000bfd8
Publikováno v:
Компьютерная оптика, Vol 43, Iss 5, Pp 714-722 (2019)
It was theoretically shown that in the interference pattern of four plane waves with specially selected directions of linear polarization it is formed a reverse flow of energy. The areas of direct and reverse flow alternate in a staggered order in th
Externí odkaz:
https://doaj.org/article/50d2071e970e4725ad4f33be3dd3afb3
Publikováno v:
Компьютерная оптика, Vol 43, Iss 3, Pp 337-346 (2019)
Using the Richards-Wolf formalism, we obtain general expressions for all components of the electric and magnetic strength vectors near the sharp focus of an optical vortex with the topological charge m and nth-order azimuthal polarization. From these
Externí odkaz:
https://doaj.org/article/e82b7e16f3b8415da8de9bb949ccd13a
Autor:
Sergey Stafeev, Victor Kotlyar
Publikováno v:
Компьютерная оптика, Vol 43, Iss 2, Pp 193-199 (2019)
In this paper, we have investigated the focusing of a second-order cylindrical vector beam by using a high numerical aperture (NA) lens limited by a ring aperture using the Richards-Wolf formulae. It was shown that the range of negative on-axis proje
Externí odkaz:
https://doaj.org/article/021e0422bb434e108aff160ed44f511c
Publikováno v:
Компьютерная оптика, Vol 43, Iss 2, Pp 174-183 (2019)
Using Jones matrices and vectors, we show that an optical metasurface composed of a set of subwavelength binary diffraction gratings and characterized by an anisotropic transmittance described by a polarization rotation matrix by the angle mφ, where
Externí odkaz:
https://doaj.org/article/9781bcd5487c4bcfa472e280473bdd89
Publikováno v:
Fibers, Vol 10, Iss 10, p 92 (2022)
It is known that angular momentum (AM) is an important characteristic of light, which can be separated into the spin (SAM) and orbital parts (OAM). The dynamical properties of the spin and orbital angular momentums are determined by the polarization
Externí odkaz:
https://doaj.org/article/ec9427e3e9c74e758919ef1845fc9084
Publikováno v:
Photonics, Vol 9, Iss 10, p 775 (2022)
The optical properties of solid-core micro-structured optical fibers (SC MOFs) have been studied for a long time. The process of the energy outflow of the core modes has always been associated with the process of constructive interference of the core
Externí odkaz:
https://doaj.org/article/aa5c404121cd4efdaa23ae537c538c6b
Publikováno v:
Sensors, Vol 22, Iss 20, p 7870 (2022)
We investigated an optical microsensor of the polarization state of a laser light based on a metalens. In contrast to known polarization sensors based on metasurfaces that deflect different polarization types using various angles to the optical axis,
Externí odkaz:
https://doaj.org/article/110d7869a18d4d23bf50f12eec7e664b