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Polarization-Independent Plasmon-Induced Transparency in a Fourfold Symmetric Terahertz Metamaterial

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8 Author(s)
Xueqian Zhang ; Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin, China ; Quan Li ; Wei Cao ; Jianqiang Gu
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Metamaterials that reveal fascinating and unique resonant properties allow for adequate control of electromagnetic waves at will. Recently, considerable studies have shown that the plasmon-induced transparency (PIT) effect can be realized by metamaterials via destructive interference between different resonance modes; however, most of them are sensitive to the polarization of incident wave. Here, we demonstrate a polarization-independent PIT metamaterial functioning in the terahertz regime. The proposed structure has a fourfold symmetry and exhibits a typical PIT behavior due to the coupling effect of four different modes, yielding polarization-independent characteristics.

Published in:

IEEE Journal of Selected Topics in Quantum Electronics  (Volume:19 ,  Issue: 1 )