Multi-Band Electromagnetically Induced Transparency-Like Metamaterials*

In this paper, a double layer metamaterial structure in the microwave band is studied. The transmission spectrum of the structure is analyzed by the finite-integration time-domain (FITD) method. The results show that the structure can produce multi-band Electromagnetically induced transparency(EIT)-like effect. To further investigate the physical mechanism of the multi-band EIT-like generation of the structure, the electric field and surface current distribution are analyzed at the resonant frequencies. The results show that the multi-band EIT is mainly generated by multiple bright modes coupled to multiple dark modes. In order to explore the potential application of the structure, the change of transmission spectrum was analyzed by changing the environmental permittivity. The structure has potential applications in refractive index sensing, microwave communication and multi-frequency filtering.