Ning Zhang, Quan Xu, Shaoxian Li, Chunmei Ouyang, Xueqian Zhang, Yanfeng Li, Jianqiang Gu, Zhen Tian, Jiaguang Han, and Weili Zhang
https://www.osapublishing.org/oe/abstract.cfm?uri=oe-25-17-20689&origin=search
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.
© 2017 Optical Society of America
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