Tunable control of electromagnetically induced transparency in hybrid grapheme metamaterials

Abstract

We propose a hybrid graphene/metamaterials device based on terahertz frequency. By placing the radiative and dark modes in the vertical and horizontal Si bars, we further demonstrate electromagnetically induced transparency (EIT), analogous to the atomic EIT. We theoretically investigate the strong interaction between graphene and EIT of the metamaterials. By varying the Fermi energy of graphene, the simulations show that graphene can actively modulate the transmission amplitude of EIT. Our results suggest that the demonstrated EIT in hybrid graphene metamaterials may offer new possibilities for applications in terahertz modulators and ultra-sensitive sensors.