Open AccessPolarization-dependent electromagnetic responses in an A-shape metasurface
Author(s) -
Ning Zhang,
Quan Xu,
Shaoxian Li,
Chunmei Ouyang,
Xueqian Zhang,
Yanfeng Li,
Jianqiang Gu,
Zhen Tian,
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.25.020689
Subject(s) - metamaterial , optics , split ring resonator , polarization (electrochemistry) , resonator , terahertz radiation , electromagnetic radiation , physics , electric field , transformation optics , negative refraction , electromagnetic field , materials science , chemistry , quantum mechanics
We numerically and experimentally demonstrate polarization-dependent terahertz responses in a proposed metasurface of A-shape resonators. With the horizontal polarization incidence, the observed transmission window is formed by two resonance dips, corresponding to the inductive-capacitive resonance at the lower frequency and the high-order antisymmetric resonance at a higher frequency, respectively. When the incident wave is perpendicularly polarized, the transmission window arises from the plasmon-induced transparency spectral response. The origin of the polarization-sensitive resonance properties is revealed by mapping the electric field and terahertz-induced surface current in the proposed metamaterials. Moreover, the influence of the geometry of the A-shape microstructures on the transmission spectra is analyzed. These polarization-dependent metamaterials may provide more degrees of freedom in tuning the electromagnetic responses, thus offering a path toward robust metamaterials design.