The implementation of dual-band electromagnetically induced transparency metastructure based on micro-strip line structure and Calcium-magnesium-titanium ceramic

Abstract

In this paper, a metastructure based on micro-strip lines (MSL) structure and Calcium-magnesium-titanium (CMT) is proposed to realize the electromagnetically induced transparency (EIT) phenomenon. In this structure, the MSL as the main structure acts as the bright mode, while the ceramic structure composed of CMT material cylinders acts as the dark mode. The EIT characteristics are simulated and analyzed, while the equivalent circuit model is established. What's more, the EIT effect of the designed structure is verified by experiments, providing convincing evidence for the dual-band EIT performance of the structure. The results show that the dual-band EIT effect is achieved in 0.2 GHz∼1.6 GHz by coupling the CMT structure with the MSL structure, and the values of both transmission peaks reach more than 90%. The physical mechanism of the EIT phenomenon is analyzed by simulating the response of bright mode and dark mode to electromagnetic waves, respectively. Compared with the previously studied EIT MSs, the proposed structure can achieve the EIT effect in dual bands with wider bandwidth, which has a certain application value in the field of optical cache.