Goos–Hänchen effect on a graphene-based hyperbolic metamaterial slab

In this paper, the tunable Goos–Hänchen (GH) effect on a graphene-based hyperbolic metamaterial slab has been investigated using the transfer matrix and finite element methods. It was shown that the excitation of the surface polaritons in the THz frequency region results in enhanced GH shift at the interface of the slab which can be controlled and tuned by changing the orientation of the optical axis of the slab, the chemical potential of graphene monolayers and the thickness of the air gap layer. These may have interesting applications in the optical devices.