Tunable enhanced Goos–Hänchen shift in one-dimensional photonic crystals containing graphene monolayers

• The GH effect at the interface of a 1D PC containing graphene is investigated.
• A large GH shift is obtained at the angles corresponding to the excitation of the SPs.
• This effect is tunable due to the controllable optical properties of the graphene.

Theoretically, the Goos–Hänchen effect at the interface of a one-dimensional photonic crystal containing graphene monolayers has been investigated. It was shown that the lateral shift of the reflected beam can be remarkably enhanced when the phase matching conditions are satisfied for the excitation of the surface polaritons at the interface of the structure in the graphene induced photonic band gap. The effect of the optical properties of the graphene sheets on the enhancement of the Goos–Hänchen shift was investigated and it was shown that the beam displacement can be controlled by the tuning of the chemical potential of graphene. This may have potential applications in the optical communication systems.