The realization of broadband electromagnetically induced transparency metastructure based on the resonance between dielectric ceramic and metal.

In this paper, a metastructure (MS) based on the metal micro-strip lines (MSL) is proposed to implement the dual-band broadband EIT phenomenon. In this MS, the MSL acts as a bright mode (BM), exhibiting strong resonance with electromagnetic wave (EMW), while the copper backplane with a split-ring hollowed is partially coupled with the MSL structure, which performs as a quasi-dark mode (QDM). Moreover, the structure with ten dielectric cylinders added on top of the MSL structure can be fully coupled with the MSL, thus behaving as a dark mode (DM). In the proposed MS, the EIT effect in two different frequency bands by coupling BM, QDM and DM is achieved. To further study, the structural parameters of the three modes are respectively discussed for the in-depth study of physical mechanisms. Simultaneously, a designed EIT structure is simulated and verified by experiments. The simulation shows that the structure forms two absorption peaks higher than 0.9 at 1.19 GHz and 2.15 GHz, and three transmission dips at 0.8 GHz, 1.56 GHz and 2.91 GHz respectively, that is, the dual-band EIT effect is generated. The experimental results are in good agreement with the simulation results. Generally speaking, the dual-frequency EIT effect of the proposed design is reliable and effective. [ABSTRACT FROM AUTHOR]