Results 31 to 40 of about 42,393 (288)

Topology of Knotted Optical Vortices

, 2007
Optical vortices as topological objects exist ubiquitously in nature. In this paper, by making use of the $\phi$-mapping topological current theory, we investigate the topology in the closed and knotted optical vortices.
, Dennis M R, Desyatnikov A S, Duan Y S, Duan Y S, Duan Y S, Duan Y S, Duan Y S, Duan Yi-Shi, Nye J F, Rañada A F, Ren Ji-Rong, Rolfsen D, Schouten J A, Thompson W, Yang G H, Zhu Tao   +16 more
core   +1 more source

Direct generation of optical vortices [PDF]

, 2014
A detailed scheme is established for the direct generation of optical vortices, signifying light endowed with orbital angular momentum. In contrast to common techniques based on the tailored conversion of the wave front in a conventional beam, this ...
B. E. A. Saleh, D. L. Andrews, D. L. Andrews, David L. Andrews, David S. Bradshaw, E. W. Weisstein, J. A. Salthouse, L. Allen, L. Valkunas, Mathew D. Williams, Matt M. Coles, R. L. Carter, V. Y. Bazhenov   +12 more
core   +1 more source

Quadrupole absorption rate for atoms in circularly-polarized optical vortices

Results in Physics, 2021
Twisted light beams, or optical vortices, have been used to drive the circular motion of microscopic particles in optical tweezers and have been shown to generate vortices in quantum gases.
Smail Bougouffa
doaj   +1 more source

Adaptive Optics and Optical Vortices [PDF]

, 2012
The achievement of minimal angular divergence of a laser beam is one of the most impor‐ tant problems in laser physics since many laser applications demand extreme concentration of radiation. Under the beam formation in the laser oscillator or amplifier with optically in‐ homogeneous gain medium and optical elements, the divergence usually exceeds the ...
Garanin, S. G., Starikov, F. A., Malakhov, Yu. I.   +2 more
openaire   +3 more sources

Microoptomechanical pumps assembled and driven by holographic optical vortex arrays

, 2004
Beams of light with helical wavefronts can be focused into ring-like optical traps known as optical vortices. The orbital angular momentum carried by photons in helical modes can be transferred to trapped mesoscopic objects and thereby coupled to a ...
Allen, Arlt, Ashkin, Blake, Bousse, Curtis, Curtis, David G. Grier, Dufresne, Dufresne, Friese, Gahagan, Garces-Chavez, He, He, Kosta Ladavac, Liron, O’Neil, Simpson, Terray, Unger   +20 more
core   +1 more source

Optical Vortices from Liquid Crystal Droplets [PDF]

Physical Review Letters, 2009
We report on the generation of mono- and polychromatic optical phase singularities from micron-sized birefringent droplets. This is done experimentally by using liquid crystal droplets whose three dimensional architecture of the optical axis is controlled within the bulk by surfactant agents.
Brasselet, Etienne, Murazawa, Naoki, Misawa, Hiroaki, Juodkazis, Saulius   +3 more
openaire   +4 more sources

Structured Optical Toroidal Vortices with Rotational Symmetry

Photonics
Toroidal vortices, as intriguing topological structures, play a fundamental role across a wide range of physical fields. In this study, we theoretically propose a family of structured optical toroidal vortices as generalized forms of toroidal vortices in
Jinzhan Zhong, Qiwen Zhan
doaj   +1 more source

Terawatt-Class Few-Cycle Short-Wave Infrared Vortex Laser

Ultrafast Science, 2023
As a driving source for many nonlinear vortex phenomena, such as the generation of isolated attosecond optical vortices, terahertz vortices, etc., terawatt-class few-cycle short-wave infrared vortex lasers are now attracting widespread attention. However,
Renyu Feng, Junyu Qian, Yujie Peng, Yanyan Li, Wenkai Li, Yuxin Leng, Ruxin Li   +6 more
doaj   +1 more source

Generation of high-order optical vortices using directly machined spiral phase mirrors

, 2011
We report on the generation of high-order optical vortices by spiral phase mirrors. The phase mirrors are produced by direct machining with a diamond tool and are shown to produce high-quality optical vortices with topological charges ranging from 1 to ...
Andersen, Beijersbergen, Bernet, Coullet, Curtis, Franke-Arnold, Grier, Heckenberg, Karimi, Kennedy, Kotlyar, Kuga, Lee, Mair, Moh, Sundbeck, Willig   +16 more
core   +1 more source

Intrinsic bistability and dual-core dark solitons and vortices in exciton polariton condensates [PDF]

, 2015
We investigate a new kind of dark solitons and vortices that can exist in the exciton-polariton condensates. These structures have discontinuity in the excitonic part of the polaritonic field and exist due to an intrinsic multiplicity of the solutions ...
Gorbach, A. V., Skryabin, D. V., Yulin, A. V.   +2 more
core   +3 more sources