Resonant subsurface terahertz absorber based on patterned graphene

In this paper, we simulate and demonstrate a patterned graphene resonant subsurface terahertz absorber using the finite element method. By adjustment of the parameters of the geometry of the structure, the absorber’s absorption can be tuned well. The structure’s angle of incidence is also evaluated. The structure can be optimally tuned to achieve over 92% absorption at any frequency point in the 1.40 THz to 3.44 THz frequency band. The structure designed by introducing two-dimensional materials has promising applications in terahertz detection and sensing, and can also be used to make filter components.