Results 1 to 10 of about 240 (106)
Spin-Orbital Conversion with the Tight Focus of an Axial Superposition of a High-Order Cylindrical Vector Beam and a Beam with Linear Polarization [PDF]
Micromachines, 2022 In this paper, spin-orbital conversion in the tight focus of an axial superposition of a high-order (order m) cylindrical vector beam and a beam with linear polarization is theoretically and numerically considered.
Victor Kotlyar +3 more
doaj +2 more sources
Photonics, 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 projections
Aleksey A. Kovalyov +2 more
exaly +3 more sources
PhotonicsInterference of two and four light beams with linear or circular polarization is studied analytically and numerically based on the Richards–Wolf formalism.
Svetlana N Khonina +2 more
exaly +3 more sources
Transverse intensity at the tight focus of a second-order cylindrical vector beam
Компьютерная оптика, 2021 In this paper, an effect of a reverse energy flow at the focus of a second-order cylindrical vector beam which passed through amplitude zone plate was investigated with a scanning near-field optical microscope.
E.S. Kozlova +4 more
doaj +1 more source
Vortex energy flow in the tight focus of a non-vortex field with circular polarization [PDF]
Компьютерная оптика, 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 can
Victor Kotlyar +2 more
doaj +1 more source
Vector Beams with Only Transverse Intensity at Focus
Applied Sciences, 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.
Sergey S. Stafeev +4 more
doaj +1 more source
An orbital energy flow and a spin flow at the tight focus
Компьютерная оптика, 2021 We have shown that a reverse energy flow (negative projection of the Poynting vector onto the optical axis) at the sharp focus of an optical vortex with topological charge 2 and left-hand circular polarization arises because the axial spin flow has a ...
S.S. Stafeev
doaj +1 more source
Minimal focal spot obtained by focusing circularly polarized light
Компьютерная оптика, 2023 In this paper, using the Richards-Wolf equations, we analyze focusing circularly polarized light with flat diffractive lenses. It is shown that as the numerical aperture of the lens increases, the size of the focal spot first decreases and then begins to
S.S. Stafeev, V.D. Zaitcev, V.V. Kotlyar
doaj +1 more source
Spin–Orbital Transformation in a Tight Focus of an Optical Vortex with Circular Polarization
Applied Sciences, 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.
Victor V. Kotlyar +4 more
doaj +1 more source
Circular polarization before and after the sharp focus for linearly polarized light
Компьютерная оптика, 2022 We consider sharp focusing of a linearly polarized light beam. Using the Richards-Wolf formalism, we show that before and after the focal plane there are cross-section regions in which the polarization is circular (elliptical).
S.S. Stafeev, V.D. Zaitsev, V.V. Kotlyar
doaj +1 more source