Thermally tunable electromagnetically induced transparency in terahertz frequency with superconducting resonators

Abstract

We present a design of electromagnetically induced transparency operating in terahertz regime based on near-field coupling between a metal strip and split ring resonators (SRR) made of superconducting film. When the SRR work in superconducting state, the transparency window can be thermally controlled. A pair of SRR has been introduced as the dark mode to enhance the coupling, which results in a broadening and high transmittance of near unity of the transparency window. These results may lead to potential applications in tunable terahertz devices, slowing light, and sensing technology.