Results 1 to 10 of about 11,404 (120)
Design of Flat Spiral Phase Plate on Fiber End Face
Guangtongxin yanjiu, 2021 Traditional high-order stepped spiral phase plate that is difficult to fabricate on the fiber end face and easy to damage during the application. In order to solve these issues, a design scheme of flat spiral phase plate fabricated on the fiber end face ...
Jie-chi ZHANG, Chang-quan XIA, Rui GAO
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Photonics, 2021 Recently, there has been increased interest in the shaping of light fields with an inverse energy flux to guide optically trapped nano- and microparticles towards a radiation source.
Andrey V. Ustinov +2 more
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Photonics, 2023 The phase and polarization of electromagnetic waves can be conveniently manipulated by the dynamic phase and geometric phase elements. Here, we propose a compact optical integration of dynamic phase and geometric phase to generate arbitrary vector vortex
Kuiming Zeng +3 more
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Photonics, 2020 The analytical solution for the propagation of the laser beam with optical vortex through the system of lenses is presented. The optical vortex is introduced into the laser beam (described as Gaussian beam) by spiral phase plate.
Ireneusz Augustyniak +4 more
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Terahertz Spiral Spatial Filtering Imaging
Applied Sciences, 2021 In this paper, we propose a terahertz (THz) spiral spatial filtering (SSF) imaging method that can enable image contrast enhancement. The related theory includes three main steps: (1) the THz image of the target is Fourier transformed to the spatial ...
Hui Liu +5 more
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Spiral phase plate with multiple singularity centers
Компьютерная оптика, 2020 We investigate a multispiral phase plate (MSPP) with multiple centers of phase singularity arbitrarily located in the MSPP plane. Equations to describe the topological charge of an optical vortex in the initial plane immediately behind the MSPP and ...
V.V. Kotlyar +3 more
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Two polygon-like beams generated by a modified interfering vortex spiral zone plate
Results in Physics, 2021 A modified interfering vortex spiral zone plate (MIVSZP) is proposed to produce two polygon-like beams at the focal plane. A radial shift parameter t3 has influence on the shapes of two beams.
Tian Xia, Shubo Cheng, Shaohua Tao
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Characterization of the Vortex Beam by Fermat’s Spiral
Photonics, 2020 In this paper, we characterize the helical beam structure through an analysis of the spiral character of the phase distribution inside a light beam. In particular, we show that a line connected with the 2π phase jump in the Laguerre–Gauss beam can be ...
Ewa Frączek +2 more
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Ferroelectric liquid crystals with sub-wavelength helix nanostructure pitch for the generation of axial-symmetric vortex light fields [PDF]
EPJ Web of Conferences, 2019 Experimental results of the formation of axially symmetric vortex light fields with a frequency of up to 2 kilohertz are presented. The results were obtained by using a 12-sector spiral phase plate (SPP) based on a planar-oriented layer of a 50 μm-thick ...
Kotova Svetlana +4 more
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Electric-Driven Polarization Meta-Optics for Tunable Edge-Enhanced Images
Micromachines, 2022 In this study, we demonstrate an electrically driven, polarization-controlled metadevice to achieve tunable edge-enhanced images. The metadevice was elaborately designed by integrating single-layer metalens with a liquid-crystal plate to control the ...
Cheng Cheng +6 more
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