Resonance Bandwidth Controllable Adjustment of Electromagnetically Induced Transparency-like Using Terahertz Metamaterial

Plasmonics - Tập 15 - Trang 1997-2002 - 2020
Yuanhao He1, Ben-Xin Wang1, Pengcheng Lou1, Nianxi Xu2, Xiaoyi Wang2, Yanchao Wang2
1School of Science, Jiangnan University, Wuxi, China
2Key Laboratory of Optical System Advanced Manufacturing Technology, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun Institute of Optics, Changchun, China

Tóm tắt

In the fields of communication and sensing, resonance bandwidth is a very critical index. It is very meaningful to implement a broadband resonance device with a simple metamaterial structure in the terahertz band. In this paper, we propose a simple metamaterial structure which consists of one horizontal metal strip and two vertical metal strips. This structure can achieve an electromagnetically induced transparency-like (EIT-like) effect in the frequency range of 0.1~3.0 THz to obtain a transparent window with a resonance bandwidth as high as 1.212 THz. When the relative distance between two vertical metal strips is changed, the bandwidth can be effectively controlled. Furthermore, we found that the EIT-like effect can be actively adjusted by replacing vertical metal strips with photosensitive silicon.

Tài liệu tham khảo

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