An electrically switchable wideband metamaterial absorber based on graphene at P band

Abstract Graphene has the capability of dynamically tuning its conductivity through gate voltage. Based on this fact, an electrically switchable wideband metamaterial absorber at low frequencies is presented and investigated in paper. Our calculated results show that absorption over 90% from 400 to 1,000 MHz with Fermi level graphene being 0 eV band can be switched by adjusting without changing physical structure. Moreover, surface current distribution enables us reveal characteristics our designed absorber. At last, we prove property polarization-insensitive due rotational symmetry structural unit. This work may provide a further step development sensors absorbers frequencies.