Investigation of the characteristics of the dual-band electromagnetic induction transparent-like terahertz spectrum in a grating-like structure

TL;DR

This paper proposes a novel grating-like metamaterial structure that exhibits dual-band electromagnetically induced transparency in the terahertz spectrum, enabling potential applications in slow-light and optical storage.

Contribution

It introduces a new dual-band U-shaped resonator design for EIT-like effects in terahertz, supported by numerical simulations and theoretical analysis.

Findings

EIT-like effect achieved in dual-band terahertz spectrum

Significant reduction in group speed near transparent window

Potential for slow-light and optical storage applications

Abstract

In this paper, a new structure is proposed which is expected to realize dual-band electromagnetically induced transparency (EIT)-like effect in 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 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, may gain more significant potential applications in slow-light transmission and optical storage.