Results 1 to 10 of about 86,685 (296)
Sharp focusing of a hybridly polarized optical vortex
Компьютерная оптикаIn this work, using the Richards-Wolf formalism, we consider the sharp focusing of optical vortices with hybrid polarization, which combines the properties of azimuthal and circular polarizations.
S.S. Stafeev, V.D. Zaitcev, V.V. Kotlyar
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Sharp acoustic vortex focusing by Fresnel-spiral zone plates [PDF]
Applied Physics Letters, 2018 We report the optimal focusing of acoustic vortex beams by using flat lenses based on a Fresnel-spiral diffraction grating. The flat lenses are designed by spiral-shaped Fresnel zone plates composed of one or several arms. The constructive and destructive interferences of the diffracted waves by the spiral grating result in sharp acoustic vortex beams,
Noe Jiménez +2 more
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Sharp focusing of beams with V-point polarization singularities [PDF]
Компьютерная оптика, 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"-shaped ...
V.V. Kotlyar +3 more
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Sharp and moderate focusing of the combined modes of a terahertz laser
Вісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2023 Background: The problem of sharp and moderate focusing of combined modes of a dielectric waveguide laser is considered. The results of research on different types of focusing of laser beams have a wide range of potential applications, from imaging and ...
O.V. Gurin +7 more
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Sharp Focusing of a Hybrid Vector Beam with a Polarization Singularity [PDF]
Photonics, 2021 The key result of this work is the use of the global characteristics of the polarization singularities of the entire beam as a whole, rather than the analysis of local polarization, Stokes and Poincare–Hopf indices.
Victor V. Kotlyar +2 more
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New Journal of Physics, 2022 Metalens with broadband and high-efficiency focusing functionality is desired in various underwater acoustic applications such as sonar and oceanography.
Jun Mei, Lijuan Fan, Xiaobin Hong
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Focusing fractional-order cylindrical vector beams
Компьютерная оптика, 2021 By numerically simulating the sharp focusing of fractional-order vector beams (0≤m≤1, with azimuthal polarization at m=1 and linear polarization at m=0), it is shown that the shape of the intensity distribution in the focal spot changes from elliptical ...
S.S. Stafeev, V.D. Zaitsev
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Компьютерная оптика, 2021 Spatial intensity distributions of the Laguerre-superGauss modes (1,0) as well as a super-Gaussian beam with radial and circular polarization were investigated versus changes in the height of a diffractive axicon.
D.A. Savelyev
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Optical Polarization Sensor Based on a Metalens
Sensors, 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, the
Victor Kotlyar +3 more
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Компьютерная оптика, 2022 The focusing features of a super-Gaussian beam, as well as Laguerre-super-Gaussian (1,0) modes with radial and circular polarizations on ring gratings (direct and inverse) with a variable height of individual relief rings were investigated in this paper.
D.A. Savelyev
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