Highly sensitive and stable identification of graphene layers via the topological edge states and graphene regulation to enhance the photonic spin Hall effect

Schematic diagram of the LWS, showing the overall structure composed of different dielectrics arranged in a quasi-periodic pattern along the + z -axis, denoted as G(AB) N (CD) N , where (AB) N is denoted as LS 1 and (CD) N is symbolized by LS 2 .