Tunable bandpass plasmonic filter based on graphene as the nonlinear Kerr material

Abstract

Abstract In this paper, a band-pass plasmonic filter is introduced based on metal–insulator–metal waveguide coupled with two narrow slabs. Our reported plasmonic structure is investigated using the numerical solution of finite element method. The filter performance is analyzed for two cases of linear and nonlinear. The selected Kerr nonlinear material is a single graphene layer. The simulation results show that, we can tune the resonant wavelength by considering the Kerr effect of the graphene layer, performance and by adjusting the incident light signal without changing the physical characteristics of the structure. The simplicity of the structure and a compact size are the advantages of the proposed nonlinear plasmonic filter which make that suitable to design the integrated all-optical circuits.