Results 1 to 10 of about 71,495 (286)
Review on fractional vortex beam [PDF]
Nanophotonics, 2021 As an indispensable complement to an integer vortex beam, the fractional vortex beam has unique physical properties such as radially notched intensity distribution, complex phase structure consisting of alternating charge vortex chains, and more ...
Zhang Hao +5 more
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Bidirectional Terahertz Vortex Beam Regulator. [PDF]
Materials (Basel), 2022 Most of the reported vortex beam generators with orbital angular momentum (OAM) in the terahertz region only operate in either the reflection mode or the transmission mode, which greatly limits the integration and application in terahertz technology systems. Herein, we propose a full-space vortex beam regulator at two different frequencies. By changing
Li J, Guo F, Zhang S, Liu C.
europepmc +3 more sources
Polygonal vortex beams in quasi-frequency-degenerate states [PDF]
IEEE Photonics Journal, 2018 We originally demonstrate the vortex beams with patterns of closed polygons [namely polygonal vortex beams (PVBs)] generated by a quasi-frequency-degenerate (QFD) Yb:CALGO laser resonator with astigmatic transformation. The PVBs with peculiar patterns of
Fu, Xing +4 more
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Acoustic Bessel Vortex Beam by Quasi-Three-Dimensional Reflected Metasurfaces [PDF]
Micromachines, 2021 Vortex beams have a typical characteristic of orbital angular momentum, which provides a new degree of freedom for information processing in remote communication and a form of non-contact manipulation for trapping particles.
Yin Wang +6 more
doaj +2 more sources
A Broadband Vortex Beam Generator Based on Single-Layer Hybrid Phase-Turning Metasurface [PDF]
Micromachines, 2023 Vortex beams carrying orbital angular momentum (OAM) have become a research frontier due to the prospect of improving spectral efficiency and transmission capacity in communication systems.
Cheng Fu, Jianing Zhao, Fang Li, Hao Li
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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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Theoretical study of vortex beam generation based on geometric coordinate transformation
Frontiers in Physics, 2022 By performing a conformal optical mapping of an input beam from Cartesian to log-polar coordinates, we propose a method to generate vortex beam. By tilting the incident beam, a phase gradient is attached and evolves into a vortex phase due to the optical
Yanke Li +5 more
doaj +1 more source
Experimental investigation in Airy transform of Gaussian beams with optical vortex
Results in Physics, 2021 The Airy transform was first introduced for a Gaussian beam, and the output beam is an Airy beam. When the Gaussian beam is extended to the Gaussian beam with optical vortex, what kind of output beam will be achieved by executing the Airy transformation.
Yi-Qing Xu +5 more
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Controlling Dispersion Characteristic of Focused Vortex Beam Generation
Photonics, 2022 As an important structured beam, vortex beams have a wide range of applications in many fields. However, conventional vortex beam generators require complex optical systems, and this problem is particularly serious with regards to focused vortex beam ...
Xueshen Li, Zhigang Fan
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Optics Express, 2021 We report on a novel curvilinear optical vortex beam named twin curvilinear vortex beams (TCVBs) with intensity and phase distribution along a pair of two- or three-dimensional curves, both of which share the same shape and the same topological charge.
Zhuang Wang +8 more
openaire +2 more sources