Frequency adjustable cross-shaped absorber based on graphene

Novel graphene-based infrared (IR) frequency tunable absorber is presented. This absorber is composed of a 400-nm-thick silicon substrate and multilayer graphene with an array of cross-shaped apertures that fill metal strips. The absorbers exhibit favorable absorption in 62–66THz by regulating the chemical potential of graphene from 0.3eV to 0.7eV. The equivalent transmission line method based on metametrial is carried out in mechanism analysis. Electrically regulating of the absorber is realized by numerical simulation and the method of modeling multilayer graphene with various permittivity is put forward. The results of the present work are shown.