Open AccessTerahertz vortex beam generator carrying orbital angular momentum in both transmission and reflection spaces
Author(s) -
Lijing Yang,
Jiusheng Li
Publication year - 2022
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.472577
Subject(s) - angular momentum , optics , orbital angular momentum multiplexing , physics , optical vortex , orbital angular momentum of light , reflection (computer programming) , vortex , total internal reflection , multiplexing , beam (structure) , terahertz radiation , light beam , transmission (telecommunications) , free space optical communication , optical communication , total angular momentum quantum number , telecommunications , classical mechanics , computer science , thermodynamics , programming language
Vortex beam generators carrying orbital angular momentum (OAM) with both transmission and reflection modes has broad application prospects in full-space high data capacity communication and orbital angular momentum multiplexing systems. In this work, we proposed a vanadium dioxide (VO 2 ) assisted metasurface to independently produce and manipulate focused vortex transmission-reflection modes with different number of beams and focal lengths under right-handed circular polarized (RCP) wave incidence. The proposed metasurface generates the diagonal vortex beams, four vortex beams, and focused vortex beam for transmission mode at 1.26THz and reflection mode at 1.06THz by changing phase state of the VO 2 . Our work may find many potential applications in future high data capacity information multiplexing communication systems.