Spin- and valley-polarized Goos–Hänchen-like shift in ferromagnetic mass graphene junction with circularly polarized light

Abstract

We investigate the band structure and Goos–Hänchen-like shift in ferromagnetic mass graphene junction modulated by the circularly polarized light. It is found that both spin and valley-related energy gaps can be opened by employing the circularly polarized light and the exchange field in mass graphene. The valley-polarized Goos–Hänchen-like shift can be identified in the presence of circularly polarized light, and the spin-polarized Goos–Hänchen-like shift can be realized with introduction of exchange field in mass graphene. Furthermore, the spin and valley polarization-related Goos–Hänchen-like shift can be achieved by combination of circularly polarized light and exchange field in mass graphene. It is hopeful that our work will be more conducive for future applications in graphene polarization transport devices.