Results 1 to 10 of about 7,684 (263)
Birth and evolution of an optical vortex [PDF]
Optics Express, 2016 When a phase singularity is suddenly imprinted on the axis of an ordinary Gaussian beam, an optical vortex appears and starts to grow radially, by effect of diffraction. This radial growth and the subsequent evolution of the optical vortex under focusing
Giuseppe Vallone +2 more
exaly +7 more sources
Optical-vortex laser ablation [PDF]
Optics Express, 2010 Laser ablation of Ta plates using nanosecond optical vortex pulses was carried out, for the first time. It was suggested that owing to orbital angular momentum of optical vortex, clearer and smoother processed surfaces were obtained with less ablation ...
Junichi Hamazaki +11 more
core +4 more sources
Recent advances on optical vortex generation
Nanophotonics, 2018 This article reviews recent progress leading to the generation of optical vortex beams. After introducing the basics of optical vortex beams and their promising applications, we summarized different approaches for optical vortex generation by discrete ...
Wang Xuewen +5 more
doaj +2 more sources
Centrosymmetric Optical Vortex [PDF]
Applied Sciences, 2019 We report on a novel optical vortex, named as centrosymmetric optical vortex (CSOV), which is constructed via four conventional optical vortices (OVs) with different topological charges (TCs).
Hao Zhang +5 more
doaj +2 more sources
Angular-multiplexed multichannel optical vortex arrays generators based on geometric metasurface
iScience, 2021 Summary: Recently, metasurface-based multichannel optical vortex arrays have attracted considerable interests due to its promising applications in high-dimensional information storage and high-secure information encryption.
Jinjin Jin +7 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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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 +6 more
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Entangled Optical Vortex Links [PDF]
Physical Review Letters, 2011 Optical vortices are lines of phase singularity which percolate through all optical fields. We report the entanglement of linked optical vortex loops in the light produced by spontaneous parametric down-conversion. As measured by using a Bell inequality, this entanglement between topological features extends over macroscopic and finite volumes.
Romero, J. +6 more
openaire +5 more sources
Subpixel localization of optical vortices using artificial neural networks [PDF]
Metrology and Measurement Systems, 2021 Optical vortices are getting attention in modern optical metrology. Because of their unique features, they can be used as precise position markers. In this paper, we show that an artificial neural network can be used to improve vortex localization.
Agnieszka Popiołek-Masajada +2 more
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