Results 1 to 10 of about 3,652 (291)
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
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Spatial variation of vector vortex beams with plasmonic metasurfaces [PDF]
Scientific Reports, 2019 The spatial variation of vector vortex beams with arbitrary polarization states and orbital angular momentum (OAM) values along the beam propagation is demonstrated by using plasmonic metasurfaces with the initial geometric phase profiles determined from
Yuchao Zhang, Jie Gao, Xiaodong Yang
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Visible-broadband Localized Vector Vortex Beam Generator with a Multi-structure-composited Meta-surface [PDF]
Nanomaterials, 2019 We demonstrate a vortex beam generator meta-surface that consists of silver structures and graphene layers. The miniature material is just a few microns in size and the working part is only a few hundred nanometers thick.
Zhuo Yang, Dengfeng Kuang
doaj +3 more sources
Dynamic control of hybrid grafted perfect vector vortex beams
Nature 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
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Tunable vector-vortex beam optical parametric oscillator. [PDF]
Sci Rep, 2019 AbstractVector-vortex beams, having both phase and polarization singularities, are of great interest for a variety of applications. Generally, such beams are produced through systematic control of phase and polarization of the laser beam, typically external to the source. However, efforts have been made to generate vector-vortex beams directly from the
Sharma V +5 more
europepmc +4 more sources
Vector vortex beams sorting of 120 modes in visible spectrum
Nanophotonics, 2023 Polarization (P), angular index (l), and radius index (p) are three independent degrees of freedom (DoFs) of vector vortex beams, which have found extensive applications in various domains.
Jia Qi +10 more
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Creation of a stable vector vortex beam with dual fractional orbital angular momentum [PDF]
Scientific ReportsRecently, vortex beams have been widely studied and applied because they carry orbital angular momentum (OAM). It is widely acknowledged in the scientific community that fractional OAM does not typically exhibit stable propagation; notably, the notion of
Lingyu Wang +4 more
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Propagation of vector vortex beams through a turbulent atmosphere
Optics Express, 2009 We numerically study the propagation properties of vector vortex beams through a turbulent atmosphere. The irradiance pattern, degree of polarization, and scintillation index of radially polarized beam are computed for different propagation distances in an atmosphere with weak and strong turbulences.
Qiwen Zhan
exaly +3 more sources
Array of vector vortex beam for audio security
JPhys PhotonicsStructured light beams, particularly vector vortex beams, have gained significant attention for secure high-capacity data encoding due to their spatially varying polarization and associated orbital angular momentum. These beams theoretically offer access
Allarakha Shikder +4 more
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Transmission of vector vortex beams in dispersive media [PDF]
Advanced Photonics, 2020 Scattering phenomena affect light propagation through any kind of medium from free space to biological tissues. Finding appropriate strategies to increase the robustness to scattering is the common requirement in developing both communication protocols and imaging systems. Recently, structured light has attracted attention due to its seeming scattering
Ilaria Gianani +10 more
openaire +3 more sources