Results 41 to 50 of about 1,705,952 (334)
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
doaj +1 more source
Stable multiple-charged localized optical vortices in cubic-quintic nonlinear media [PDF]
, 2003 The stability of two-dimensional bright vortex solitons in a media with focusing cubic and defocusing quintic nonlinearities is investigated analytically and numerically. It is proved that above some critical beam powers not only one- and two-charged but
A I Yakimenko +13 more
core +1 more source
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
openaire +2 more sources
Nondiffracting beams for vortex tomography [PDF]
Optics Letters, 2010 3 pages. 2 eps figures.
Rehacek, J. +5 more
openaire +3 more sources
Divergence of optical vortex beams [PDF]
Applied Optics, 2015 4 pages, 4 ...
Reddy, Salla Gangi +5 more
openaire +3 more sources
Vortex beam array generated by a volume compound fork grating in lithium niobite
Results in Physics, 2021 Here, we report a generation of vortex beam array based on a micro volume compound fork grating fabricated by a femtosecond laser direct writing technique in lithium niobite crystal.
Yu Zhuang +5 more
doaj +1 more source
Multichannel terahertz quasi-perfect vortex beams generation enabled by multifunctional metasurfaces
Nanophotonics, 2022 Vortex beams carrying orbital angular momentum (OAM) open a new perspective in various terahertz research. Multichannel and divergence controllable terahertz vortex beam generation holds the key to promoting the development of OAM related terahertz ...
Liu Wanying +7 more
doaj +1 more source
Integrated optical vortex beam receivers [PDF]
Optics Express, 2016 A simple and ultra-compact integrated optical vortex beam receiver device is presented. The device is based on the coupling between the optical vortex modes and whispering gallery modes in a micro-ring resonator via embedded angular gratings, which provides the selective reception of optical vortex modes with definitive total angular momentum ...
Cicek, Kenan +11 more
openaire +6 more sources
Airy Transform of the New Power-Exponent-Phase Vortex Beam
Photonics, 2023 A new power-exponent-phase vortex beam with nonlinear phase winding has shown flexible control freedom compared with conventional vortex beams. In order to further enrich the modulation freedom and expand the ability of self-healing to meet current ...
Qidong Lin +6 more
doaj +1 more source
Manipulation of Energy Flow with X-Type Vortex
Photonics, 2022 In this study, a new method for manipulating energy flow in a 3D vector field is proposed. In this method, an azimuthally-polarized beam with a noncanonical vortex, the X-type vortex, is focused in a high-numerical aperture system.
Han Zhang +3 more
doaj +1 more source