Open AccessUltrathin metasurface-based carpet cloak for terahertz wave
Author(s) -
Minggui Wei,
Quanlong Yang,
Xueqian Zhang,
Yanfeng Li,
Jianqiang Gu,
Jiaguang Han,
Weili Zhang
Publication year - 2017
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.015635
Subject(s) - cloak , terahertz radiation , cloaking , optics , metamaterial , materials science , antenna (radio) , wavefront , resonator , reflection (computer programming) , phase (matter) , reflection coefficient , optoelectronics , computer science , physics , telecommunications , quantum mechanics , programming language
Ultrathin metasurfaces with local phase compensation deliver new schemes to cloaking devices. Here, a large-scale carpet cloak consisting of an ultrathin metasurface is demonstrated numerically and experimentally in the terahertz regime. The proposed carpet cloak is designed based on discontinuous-phase metallic resonators fabricated on a polyimide substrate, offering a wide range of reflection phase variations and an excellent wavefront manipulation along the edges of the bump. The invisibility is verified when the cloak is placed on a reflecting triangular surface (bump). The multi-step discrete phase design method would greatly simplify the design process and is probable to achieve large-dimension cloaks, for applications in radar and antenna systems as a thin, lightweight, and easy-to-fabricate solution for radio and terahertz frequencies.