Electromagnetically induced transparency based on metal-graphene hybrid metamaterials

Abstract

This paper introduces a novel metal-graphene composite metamaterial modulator that can produce a tunable EIT (Electromagnetically induced transparency) effect with good modulation effect under the action of an applied voltage. The material structure consists of bright mode coupling between a metal strip and a metal U-shaped ring. We investigated the nature of the field and indicated that the detuning of the dipole of the metallic ribbon structure and the quadrupole structure of the metallic U-ring induces an EIT-like reaction. The coupling effect of the metal resonant cavity was analyzed, this is, the coupling between the metal layer and the mono-graphene on the transparency window. By varying the voltage between the substrate silicon and the monolayer graphene surface in the structure, the modulator can achieve a maximum modulation depth of 83.4% and on the transparent window, the light will have a positive group delay of 8 ps, This wok can be applied to future 6G wireless communications et al.