Results 1 to 10 of about 2,764,686 (330)
Review on fractional vortex beam [PDF]
Nanophotonics, 2021 As an indispensable complement to an integer vortex beam, the fractional vortex beam has unique physical properties such as radially notched intensity distribution, complex phase structure consisting of alternating charge vortex chains, and more ...
Zhang Hao +5 more
doaj +6 more sources
Multifunctional metasurface coding for visible vortex beam generation, deflection and focusing [PDF]
NanophotonicsVortex beams, as beams carrying orbital angular momentum (OAM), exhibit unique donut-shaped intensity distributions and helical wavefronts. They are widely applied in fields such as optical communication, nanoparticle manipulation, and quantum ...
Run Tian, Zhixiao Zhang, Li Gao
semanticscholar +2 more sources
Vortex beam generation with variable topological charge based on a spiral slit
Nanophotonics, 2019 We propose a vortex beam generator based on a nanometer spiral slit and explore the propagation rule of the topological charge. Compared to the common methods of generation of a vortex beam with a fixed topological charge, the optical vortex generated by
Wang Han +6 more
doaj +2 more sources
Acoustic Bessel Vortex Beam by Quasi-Three-Dimensional Reflected Metasurfaces [PDF]
Micromachines, 2021 Vortex beams have a typical characteristic of orbital angular momentum, which provides a new degree of freedom for information processing in remote communication and a form of non-contact manipulation for trapping particles.
Yin Wang +6 more
doaj +2 more sources
A Broadband Vortex Beam Generator Based on Single-Layer Hybrid Phase-Turning Metasurface [PDF]
Micromachines, 2023 Vortex beams carrying orbital angular momentum (OAM) have become a research frontier due to the prospect of improving spectral efficiency and transmission capacity in communication systems.
Cheng Fu, Jianing Zhao, Fang Li, Hao Li
doaj +2 more sources
IEEE Access, 2020 In this paper, we propose a method to generate a high-order Bessel orbital angular momentum (OAM) vortex beam by using a single-layer reflective metasurface, which integrates the advantages of small size, high efficiency, insensitive polarization and ...
Haixia Liu +4 more
doaj +2 more sources
Generation of E-band metasurface-based vortex beam with reduced divergence angle [PDF]
Sci Rep, 2020 Vortex beams carrying orbital angular momentum (OAM) have attracted considerable attention for the development of high-capacity wireless communication systems due to their infinite sets of orthogonal modes. However, the practical applications of Laguerre-
Hyeongju Chung +5 more
semanticscholar +2 more sources
Ultrathin dual-mode vortex beam generator based on anisotropic coding metasurface [PDF]
Sci Rep, 2020 In this paper, an anisotropic coding metasurface is proposed to achieve dual-mode vortex beam generator by independently manipulating the orthogonally linearly polarized waves. The metasurface is composed of ultrathin single-layer ground-backed Jerusalem
Liang Zhang, Jie Guo, Tong-Yu Ding
semanticscholar +2 more sources
Partially coherent radially polarized fractional vortex beam
Optics Express, 2020 A new kind of partially coherent vector beam, named a partially coherent radially polarized fractional vortex (PCRPFV) beam, is introduced as a natural extension of the recently introduced scalar partially coherent fractional vortex beams [Zeng et al ...
Greg Gbur, Jun Zeng, Chunhao Liang
exaly +2 more sources
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