Electromagnetic propagation anisotropy of a bi-layer metamaterial at terahertz band

Qi-Ye Wen; Huai-Wu Zhang; Yun-song Xie; Sheng Li; Qing-Hui Yang; De-Gang Xu; Jian-Quan Yao

doi:10.1117/12.820468

16 February 2009 Electromagnetic propagation anisotropy of a bi-layer metamaterial at terahertz band

Qi-Ye Wen, Huai-Wu Zhang, Yun-song Xie, Sheng Li, Qing-Hui Yang, De-Gang Xu, Jian-Quan Yao

Proceedings Volume 7277, Photonics and Optoelectronics Meetings (POEM) 2008: Terahertz Science and Technology; 72770A (2009) https://doi.org/10.1117/12.820468
Event: Photonics and Optoelectronics Meetings, 2008, Wuhan, China

Abstract

In this letter, a bi-layer metamaterial composed of SRR layer and split wires layer is proposed, and the anisotropy of THz propagation through this MTM was firstly addressed and the intrinsic physic foundation was preliminarily discussed. The metamaterial consists of SRR layer, polyimide slab, and metal wires layer on GaAs substrate. A strong absorbance of 99.93% is obtained at 0.836 THz when the THz wave propagates in the "positive" directions of the absorber while in the "negative" case this value is only 2.16%. Our results indicate a strong interaction coupling between the SRR layer and the wires layer, which significantly enhanced the value of the power loss in the space between the two metal layers, leading to the perfect absorbance. The wires layer is a wave reflector which reflects most of the THz wave thus induced the absorbance anisotropy of this metamaterial.

Citation Download Citation

Qi-Ye Wen, Huai-Wu Zhang, Yun-song Xie, Sheng Li, Qing-Hui Yang, De-Gang Xu, and Jian-Quan Yao "Electromagnetic propagation anisotropy of a bi-layer metamaterial at terahertz band", Proc. SPIE 7277, Photonics and Optoelectronics Meetings (POEM) 2008: Terahertz Science and Technology, 72770A (16 February 2009); https://doi.org/10.1117/12.820468

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