In this paper, a new structure is proposed which is expected to realize a dual-band electromagnetically induced transparency (EIT)-like effect in the terahertz spectrum. It can be regarded as a metamaterial of grating-like elements composed of dual-band U-shaped resonators. The near-field coupling between bright modes can produce an EIT-like effect. After optimizing the parameters, our numerical simulated results are in good agreement with the theoretical analysis. The EIT-like effect can significantly reduce the group speed near the transparent window, and may gain more significant potential applications in slow-light transmission and optical storage.

中文翻译：

---

类光栅结构中双波段电磁感应透明类太赫兹光谱特性研究

在本文中，提出了一种新结构，有望在太赫兹光谱中实现类似双波段电磁感应透明 (EIT) 的效果。它可以看作是由双波段U形谐振器组成的类光栅元件的超材料。明亮模式之间的近场耦合可以产生类似 EIT 的效果。优化参数后，数值模拟结果与理论分析吻合较好。类EIT效应可以显着降低透明窗口附近的群速度，在慢光传输和光存储方面可能获得更显着的潜在应用。