Zobrazeno 1 - 10
of 260
pro vyhledávání: '"A. G. Nalimov"'
Publikováno v:
Applied Sciences, Vol 14, Iss 14, p 6305 (2024)
It is shown in this work that, with strong focusing of a beam with optical vortex and circular polarization, three energy flows take place in the focal plane: direct longitudinal, reverse longitudinal and azimuthal transverse flows. Calculations are
Externí odkaz:
https://doaj.org/article/960c2339be2241c1a74a01cd59f3f576
Publikováno v:
Micromachines, Vol 15, Iss 3, p 350 (2024)
Two linked gear wheels in a micromachine can be simultaneously rotated in opposite directions by using a laser beam that has in its section areas the spin angular momentum (SAM) of the opposite sign. However, for instance, a cylindrical vector beam h
Externí odkaz:
https://doaj.org/article/0a48618232a94d0d88a3e6428a19a9ed
Publikováno v:
Micromachines, Vol 14, Iss 7, p 1470 (2023)
Elements of micromachines can be driven by light, including structured light with phase and/or polarization singularities. We investigate here a paraxial vector Gaussian beam with an infinite number of polarization singularities residing evenly on a
Externí odkaz:
https://doaj.org/article/844559a647474e2dbf96439628967beb
Publikováno v:
Applied Sciences, Vol 13, Iss 14, p 8466 (2023)
We consider sharp focusing of an axial superposition of two optical vortices with identical topological charges, but different amplitudes and circular polarizations of different signs. The ratio of the amplitudes of the two beams is a parameter. When
Externí odkaz:
https://doaj.org/article/ba342e42204c47deae5d74ac5d6189ac
Autor:
Victor V. Kotlyar, Anton G. Nalimov, Sergey S. Stafeev, Alexey A. Kovalev, Alexey P. Porfirev
Publikováno v:
IEEE Photonics Journal, Vol 12, Iss 5, Pp 1-13 (2020)
In this work, we derive analytical relations for all projections of the orbital energy flow and spin flow in the focal plane of a strongly focused left-hand circularly polarized Gaussian beam, also calculating a torque exerted upon a dielectric ellip
Externí odkaz:
https://doaj.org/article/ddcb7d5f2a3f4ce88ce4a0137be64963
Publikováno v:
Photonics, Vol 9, Iss 10, p 734 (2022)
In this work, we theoretically and numerically show that in the superposition of optical Gaussian vortices with a symmetric OAM spectrum, the normalized orbital angular momentum (OAM) carried by the beam and the topological charge (TC) equal TC of th
Externí odkaz:
https://doaj.org/article/793444ceb8c0494a92cf0e9eb038d17c
The Non-Vortex Inverse Propagation of Energy in a Tightly Focused High-Order Cylindrical Vector Beam
Publikováno v:
IEEE Photonics Journal, Vol 11, Iss 4, Pp 1-10 (2019)
In this paper, the tight focusing of high-order cylindrical vector beams (beams with polarization singularity) was investigated. Using the Richards-Wolf formalism, there were obtained expressions for all projections of the electric and magnetic light
Externí odkaz:
https://doaj.org/article/d7fe77de49e349bb86dad05c99847aad
Autor:
Sergey S. Stafeev, Anton G. Nalimov, Alexey A. Kovalev, Vladislav D. Zaitsev, Victor V. Kotlyar
Publikováno v:
Photonics, Vol 9, Iss 3, p 196 (2022)
We have considered the tight focusing of light with linear polarization. Using the Richards–Wolf formalism, it is shown that before and after the focal plane, there are regions in which the polarization is circular (elliptical). When passing throug
Externí odkaz:
https://doaj.org/article/6c2013093b5a48348fd7a6d4d4558056
Autor:
A. G. Nalimov, V. V. Kotlyar
Publikováno v:
Nanobiotechnology Reports. 17:915-919
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5287d1b1af0fe015cb867e1f31fd2f2
https://doi.org/10.1134/s2635167622060076
https://doi.org/10.1134/s2635167622060076
Publikováno v:
Photonics, Vol 8, Iss 10, p 445 (2021)
It is well known that the orbital angular momentum (OAM) of a light field is conserved on propagation. In this work, in contrast to the OAM, we analytically study conservation of the topological charge (TC), which is often confused with OAM, but has
Externí odkaz:
https://doaj.org/article/3220a03bccd44c84b92ee626825c2013