Dynamically tunable resonant strength in an electromagnetically induced transparency metasurface based on vanadium dioxide

Electromagnetic induced transparency (EIT) refers to the phenomenon of a sharp transmission window in a broad absorption profile, which was first discovered in the interference between the electronic transition paths of three energy levels. In this work, a metasurface structure with EIT is designed by coupling a dark-like mode and a bright mode. In order to make its resonance intensity dynamically adjustable, the metasurface structure in this paper adds a structure composed of vanadium dioxide (VO2) to the original EIT structure. When vanadium dioxide is at different temperature, its conductivity is different, and the degree of participation in metasurface resonance is different. Thus, the dynamic tuning of the EIT resonance intensity is realized, and the modulation depth can reach 76.18%.