Zobrazeno 1 - 10
of 147
pro vyhledávání: '"Sergey S. Stafeev"'
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
Autor:
Victor V. Kotlyar, Alexey A. Kovalev, Alexey M. Telegin, Elena S. Kozlova, Sergey S. Stafeev, Alexander Kireev, Kai Guo, Zhongyi Guo
Publikováno v:
Applied Sciences, Vol 14, Iss 9, p 3926 (2024)
In this work, using a Richards-Wolf formalism, we derive explicit analytical relationships to describe vectors of the major and minor axes of polarization ellipses centered in the focal plane when focusing a cylindrical vector beam of integer order n
Externí odkaz:
https://doaj.org/article/48fed45add034d038cc347350c310b24
Publikováno v:
Photonics, Vol 11, Iss 4, p 330 (2024)
In this paper, tight focusing of a superposition of a vortex laser beam with topological charge n with linear polarization and a plane wave with the same linear polarization directed along the horizontal axis is considered. Using the Richards–Wolf
Externí odkaz:
https://doaj.org/article/200ec203cc5041288266530be6508334
Autor:
Sergey S. Stafeev, Nikita N. Kazakov, Vladislav D. Zaitsev, Sergey D. Poletayev, Victor V. Kotlyar
Publikováno v:
Applied Sciences, Vol 13, Iss 22, p 12519 (2023)
In this work, the tight focusing of vector beams with azimuthal polarization and beams with a V-line of polarization singularity (sector azimuthal polarization) was simulated numerically using the Richards–Wolf formulas. It was demonstrated that in
Externí odkaz:
https://doaj.org/article/7e2600908a4845deac6769010768c276
Publikováno v:
Photonics, Vol 10, Iss 11, p 1247 (2023)
The Richards–Wolf formulas not only adequately describe a light field at a tight focus, but also make it possible to describe a light field immediately behind an ideal spherical lens, that is, on a converging spherical wave front. Knowing all proje
Externí odkaz:
https://doaj.org/article/c0a0bc6dc6f44956b9ba2889a1f7b789
Publikováno v:
Photonics, Vol 10, Iss 10, p 1093 (2023)
We have shown how the spin Hall effect is formed in a tight focus for two light fields with initial linear polarization. We have demonstrated that an even number of local subwavelength regions appear in which the sign of the longitudinal projection o
Externí odkaz:
https://doaj.org/article/1a00f2d61c1d46e1b887f102d87465a2
Autor:
Victor V. Kotlyar, Sergey S. Stafeev, Vladislav D. Zaitsev, Alexey M. Telegin, Elena S. Kozlova
Publikováno v:
Applied Sciences, Vol 13, Iss 14, p 8361 (2023)
In the framework of the Richards–Wolf formalism, the spin–orbit conversion upon tight focusing of an optical vortex with circular polarization is studied. We obtain exact formulas which show what part of the total (averaged over the beam cross-se
Externí odkaz:
https://doaj.org/article/516983379bf141bda2f4e2cef86018a2
Publikováno v:
Photonics, Vol 10, Iss 6, p 606 (2023)
We derive analytical formulae for the complex amplitudes of variants of generalized Hermite–Gaussian (HG) and Laguerre–Gaussian (LG) beams. We reveal that, at particular values of parameters of the exact solution of the paraxial propagation equat
Externí odkaz:
https://doaj.org/article/411dde3164814ad896405a0881347d42
Publikováno v:
Micromachines, Vol 14, Iss 4, p 777 (2023)
Elements of micromachines can be driven by light, including structured light with phase and/or polarization singularities. We investigate a paraxial vectorial Gaussian beam with multiple polarization singularities residing on a circle. Such a beam is
Externí odkaz:
https://doaj.org/article/e96f5bbae3b9449084d8313957632187
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