Results 11 to 20 of about 35,390 (284)

Dynamic control of hybrid grafted perfect vector vortex beams [PDF]

open access: yesNature Communications, 2023
Perfect vector vortex beams (PVVBs) have attracted considerable interest due to their peculiar optical features. PVVBs are typically generated through the superposition of perfect vortex beams, which suffer from the limited number of topological charges (
Hammad Ahmed   +5 more
doaj   +2 more sources

A Review of Orbital Angular Momentum Vortex Beams Generation: From Traditional Methods to Metasurfaces

open access: yesApplied Sciences, 2020
In this paper, we review the generation of vortex beams carrying orbital angular momentum in the microwave domain. We firstly present the theory of Laguerre−Gaussian beams where it is demonstrated that they carry such type of momentum.
Kuang Zhang   +3 more
doaj   +3 more sources

Measuring high-efficiency perfect composite vortex beams with reflective metasurfaces in microwave band [PDF]

open access: yesNanophotonics
Optical vortex beams carrying orbit angular momentum have attracted significant attention recently. Perfect vortex beams, characterized by their topological charge-independent intensity profile, have important applications in enhancing communication ...
Hong Jing   +8 more
doaj   +2 more sources

Theoretical Study on Generation of Multidimensional Focused and Vector Vortex Beams via All-Dielectric Spin-Multiplexed Metasurface [PDF]

open access: yesNanomaterials, 2022
The optical vortex (OV) beams characterized by orbital angular momentum (OAM) possess ubiquitous applications in optical communication and nanoparticle manipulation.
Yue Liu   +8 more
doaj   +2 more sources

Phase memory of optical vortex beams [PDF]

open access: yesScientific Reports, 2022
Optical vortex beams are under considerable scrutiny due to their demonstrated potential for applications ranging from quantum optics to optical communications and from material processing to particle trapping.
Mahdi Eshaghi   +4 more
doaj   +2 more sources

Polygonal vortex beams in quasi-frequency-degenerate states [PDF]

open access: yesIEEE 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
core   +4 more sources

Creation of two vortex-entangled beams in a vortex beam collision with a plane wave [PDF]

open access: yesPhysical Review A, 2012
Physics of photons and electrons carrying orbital angular momentum (OAM) is an exciting field of research in quantum optics and electron microscopy.
Ivanov, I. P.
core   +2 more sources

Generating Different Polarized Multiple Vortex Beams at Different Frequencies from Laminated Meta-Surface Lenses [PDF]

open access: yesMicromachines, 2021
We demonstrate the generation of multiple orbital angular momentum (OAM) vortex beams with different radiating states at different frequencies through a laminated meta-surface lens consisting of a dual polarized meta-array interconnected with a frequency
Pengfei Gao, Rui Yang
doaj   +2 more sources

Nondiffracting beams for vortex tomography [PDF]

open access: yesOptics Letters, 2005
We propose a reconstruction of vortex beams based on the implementation of quadratic transformations in the orbital angular momentum. The information is encoded in a superposition of Bessel-like nondiffracting beams.
Andrei B. Klimov   +16 more
core   +3 more sources

Quarter-Wave Plate Metasurfaces for Generating Multi-Channel Vortex Beams [PDF]

open access: yesNanomaterials
Metasurfaces of quarter-wave plate (QWP) meta-atoms have exhibited high flexibility and versatile functionalities in the manipulation of light fields. However, the generation of multi-channel vortex beams with the QWP meta-atom metasurfaces presents a ...
Ziheng Zhang   +9 more
doaj   +2 more sources

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