Open AccessHigh-efficiency ultrathin metasurfaces with simultaneous control of complete phase, amplitude, and polarization
Author(s) -
Yufei Yang,
Yongzhong ZHU,
Wei Xie,
Lijun Bu,
Yadan Zang,
Xiaoyu Liu
Publication year - 2023
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.470556
Subject(s) - optics , beam steering , amplitude , phase modulation , polarization (electrochemistry) , photonics , phase (matter) , beam (structure) , materials science , physics , chemistry , quantum mechanics , phase noise
Metasurfaces that can simultaneously manipulate both amplitude and phase have garnered interest and have promising applications owing to their strong beam-steering ability; however, achieving a high maximum transmission while covering the full phase shift remains challenging. This paper proposes a chiral-structured meta-atom composed of two external cross-polarized patches and an internal coupling structure. It enables the independent modulation of the phase, amplitude, and polarization at large incidence angles and ensures a high maximum transmission with a complete phase shift enabled by the two internal rotation structures. The transmission phase and amplitude can be independently controlled by adjusting the geometry and rotation angle of the meta-atoms. The performance and feasibility of the method were verified using an ultra-thin high-order Bessel beam generator sample with a thickness of 2 mm (about λ 0 /11 at 14 GHz). This design can meet arbitrary requirements for extreme beam steering and has broad application prospects in the fields of electromagnetism and photonics.