Regulation of Multiwavelength Optical Absorption Property Based on Graphene-hBN Thin Films

In the infrared band, graphene and hexagonal boron nitride (hBN), as excellent twodimensional (2D) materials capable of exciting Plasmons Polariton and Phonon Polariton, have great application value in the fields of sensing, waveguide and detection. In this paper, a graphenehBN/silver grating hybrid heterostructure is designed to enhance and control the absorptivity of graphene-hBN by utilizing plasma-phonon polaritons, which are induced by the magnetic Polariton (MP) effect excited in the grating groove. The absorption and electromagnetic properties of the hybrid heterostructure are calculated by the finite element method. The influence of structural parameters on the absorption characteristic is also studied. The hybrid structure proposed in this paper could provide a potential reference for optical detection and other fields.