Results 21 to 30 of about 70,968 (286)
Компьютерная оптика, 2022 In this work, using the Rayleigh-Sommerfeld integral and the Berry formula, the topological charge (TC) of a Gaussian optical vortex with an initial fractional TC is calculated. It is shown that for different fractional parts of the TС, the beam contains
A.G. Nalimov, V.V. Kotlyar
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IEEE Access, 2020 In this paper, a chamfer distribution antenna array is designed to generate a deflecting circular-polarized vortex beam carrying orbital angular momentum (OAM) mode.
Jun Liang +4 more
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Reconstructing the Poynting vector skew angle and wave-front of optical vortex beams via two-channel moir\'e deflectometery [PDF]
, 2013 A novel approach based on the two-channel moir\'e deflectometry has been used to measure both wave-front and transverse component of the Poynting vector of an optical vortex beam. Generated vortex beam by the q-plate, an inhomogeneous liquid crystal cell,
Dashti, Mohsen +5 more
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Vortex strength and beam propagation factor of fractional vortex beams
Optics Express, 2019 9 pages, 5 ...
Jisen Wen +4 more
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Physical Essence of Propagable Fractional‐Strength Optical Vortices in Free Space
Advanced Photonics Research, 2023 Fractional‐order vector vortex beams (VVBs) have recently been demonstrated as new carriers of fractional‐strength optical vortices. However, the inherent mechanism of the new vortex beams, formed by the combination of both unstable states, to propagate ...
Xiaoyu Weng +10 more
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Frontiers in Physics, 2023 Helicity and topological charge are two important characteristic parameters for vortex beam applications, including optical communications, optical manipulation and material processing, etc.
Shibing Lin +13 more
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Microwave vortex beam launcher design [PDF]
IET Microwaves, Antennas & Propagation, 2018 A novel design for a vectorial vortex beam launcher in the microwave regime is devised. The beam is formed by launching a single guided transverse electric (TE) mode of a metallic circular waveguide into free‐space. Excitation is achieved by the mean of an inserted coaxial loop antenna.
Nedime Pelin M.H. Salem +2 more
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Abruptly autofocusing vortex beams
Optics Express, 2012 We generate abruptly autofocusing beams that produce vortices at the focus. We give explicit equations for the phase-only Fourier masks that generate these beams including explanations for controlling the focal distance and numerical aperture. We show experimental results for the focal distance, the vortex pattern and show that the diameter of the ...
Jeffrey A, Davis +2 more
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Nondiffracting beams for vortex tomography [PDF]
Optics Letters, 2010 3 pages. 2 eps figures.
Rehacek, J. +5 more
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Optical spin-dependent beam separation in cyclic group symmetric metasurface
Nanophotonics, 2020 Cross-polarization scattering of a circularly polarized beam from nano-rod introduces a geometric phase to the outgoing beam with opposite circular polarization.
Lee Yeon Ui +5 more
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