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.

在通信和传感领域，谐振带宽是非常关键的指标。实现具有太赫兹频带中简单的超材料结构的宽带谐振装置非常有意义。在本文中，我们提出了一种简单的超材料结构，该结构由一个水平金属带和两个垂直金属带组成。这种结构可以在0.1〜3.0THz的频率范围内实现电磁感应的类透明（EIT-like）效果，从而获得谐振带宽高达1.212THz的透明窗口。当改变两个垂直金属条之间的相对距离时，可以有效地控制带宽。此外，我们发现可以通过用光敏硅代替垂直金属条来主动调节类似EIT的效果。