Open AccessPolarization induced reconfigurable multiple OAM vortex waves through a composite meta-surface beam former
Author(s) -
Chenguang Gu,
Rui Yang,
Yachao Li
Publication year - 2021
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.426527
Subject(s) - optics , optical vortex , physics , polarization (electrochemistry) , vortex , angular momentum , lens (geology) , light beam , beam (structure) , electromagnetic radiation , chemistry , quantum mechanics , thermodynamics
We demonstrate a composite meta-surface beam former to generate reconfigurable multiple orbital angular momentum (OAM) vortex waves by integrating a polarization conversion meta-mirror with a multi-functional anisotropic meta-lens. More specifically, electromagnetic fields from the feed would be firstly reflected by the meta-mirror, and then transmit through the meta-lens to form the well converged OAM vortex waves with tailored beam numbers, radiation directions and topological charges. Especially, we show that the anisotropic characteristics of the meta-lens would create different multiple OAM vortex waves when the meta-mirror is rotated or equipped with active circuits to have different polarized illuminations on the meta-lens. Our design should pave the way for the reconfigurable design of generating multiple OAM vortex waves to further expand the communication capacity.