Results 281 to 290 of about 1,705,952 (334)
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Physical Review Applied, 2021
We discuss the generation and measurement of a Bessel vortex beam carrying multiple orbital-angular-momentum (OAM) modes in the radio-frequency domain.
Q. Feng +4 more
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We discuss the generation and measurement of a Bessel vortex beam carrying multiple orbital-angular-momentum (OAM) modes in the radio-frequency domain.
Q. Feng +4 more
semanticscholar +1 more source
SPIE Proceedings, 2006
A novel method for tuning the orbital angular momentum (OAM) content of a vortex beam is presented. This approach makes use of the shaping of the odd and even components of the helical phase profile associated to the vortex. A relative azimuthal shift of the components results in the harmonic variation of the magnitude of the OAM density of the ...
C. López-Mariscal +1 more
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A novel method for tuning the orbital angular momentum (OAM) content of a vortex beam is presented. This approach makes use of the shaping of the odd and even components of the helical phase profile associated to the vortex. A relative azimuthal shift of the components results in the harmonic variation of the magnitude of the OAM density of the ...
C. López-Mariscal +1 more
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Journal of the Optical Society of America A, 2008
Hollow beam formation of radially and azimuthally polarized vortex beams, which has arbitrary topological charge, is analytically discussed under the strong focusing condition. The expressions for the electric fields of the focused vector-vortex beams are obtained based on a vector diffraction theory.
Shunichi, Sato, Yuichi, Kozawa
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Hollow beam formation of radially and azimuthally polarized vortex beams, which has arbitrary topological charge, is analytically discussed under the strong focusing condition. The expressions for the electric fields of the focused vector-vortex beams are obtained based on a vector diffraction theory.
Shunichi, Sato, Yuichi, Kozawa
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Multifunctional Vortex Beam Generation by a Dynamic Reflective Metasurface
Advanced Optical Materials, 2020In recent decades, metasurfaces have attracted considerable interest to generate vortex beams, that is, orbital angular momentum (OAM) carrying beams. However, the existing OAM metasurfaces are mostly fixed‐mode or with single function. Here a concept of
Baiyang Liu +3 more
semanticscholar +1 more source
Orbital Angular Momentum Reversal and Asymmetry in Acoustic Vortex Beam Reflection.
Physical Review Letters, 2020We present acoustic modeling, measurements, and interpretation of the angular momentum carried in an ultrasonic vortex beam that is obliquely reflected off a flat water-air interface.
Zheguang Zou, R. Lirette, Likun Zhang
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Tight-focusing properties of linearly polarized circular Airy Gaussian vortex beam
, 2020We show the tight-focusing properties of a linearly polarized circular Airy Gaussian vortex beam (CAiGVB) with a high-numerical-aperture objective lens; the light intensity distributions exhibit diversity with different positions of the vortex pairs (on ...
Jingli Zhuang, Liping Zhang, D. Deng
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Physical Review A, 2014
The concept that all de Broglie particles can form vortex beams is analyzed for neutral atoms. It is shown how atoms diffracted from a suitably constructed optical mask configuration employing light of $l$ units of orbital angular momentum and at far-off resonance with an atomic transition can lead to the generation of a discrete set of atom vortex ...
V. E. Lembessis +3 more
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The concept that all de Broglie particles can form vortex beams is analyzed for neutral atoms. It is shown how atoms diffracted from a suitably constructed optical mask configuration employing light of $l$ units of orbital angular momentum and at far-off resonance with an atomic transition can lead to the generation of a discrete set of atom vortex ...
V. E. Lembessis +3 more
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Applied Physics Letters, 2020
The microwave spectrum has become more and more crowded, motivating the investigation of new techniques to increase the communication capacity. Vortex beams carrying orbital angular momentum (OAM) have the capability for providing an extra degree of ...
H. Feng +5 more
semanticscholar +1 more source
The microwave spectrum has become more and more crowded, motivating the investigation of new techniques to increase the communication capacity. Vortex beams carrying orbital angular momentum (OAM) have the capability for providing an extra degree of ...
H. Feng +5 more
semanticscholar +1 more source
High-performance terahertz vortex beam generator based on square-split-ring metasurfaces.
Optics Letters, 2020Generating a vortex beam is a fundamental task due to the potential applications in wireless communication. Here we propose a kind of high-performance terahertz vortex beam generator with several topological numbers based on the square-split-ring ...
Kaixiang Cheng +4 more
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Microwave-Vortex-Beam Generation Based on Spoof-Plasmon Ring Resonators
, 2020Vortex beams carrying orbital angular momentum (OAM) have recently attracted great interest due to their capability for providing a new method to increase the communication channels in wireless communications.
Z. Liao +8 more
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