Dual-band Bandstop Filter Based-on Graphene in the Infrared Frequency Range

Abstract

A graphene-based dual-band bandstop filter (DB-BSF) is presented in the infrared band. The filter is made up with a graphene waveguide and two graphene-ribbon resonators on the Al2O3/Si substrate, which supports waveguide mode and edge mode, respectively. The center frequency of each stopband can be independently adjusted by applying different bias electric fields upon graphene ribbons. The proposed configuration is significant in novel optical communication systems as a critical component.