Dual-mode near-infrared light tunable absorber based on graphene by optical Tamm state and microcavity
Shuhan Chen
Abstract
A metal dual distributed Bragg reflector (DBR)-based cavity structure embedded with graphene and spacer layer is proposed to tune the dual-mode absorption in the near-infrared wavelength induced by the Optical Tamm state (OTS) and Fabry–Perot (FP) cavity. The effects of optical spacer thickness, fermi level of graphene, DBR pair number and Bragg wavelength on tuning dual-mode absorption of graphene are explored using the transfer matrix method (TMM). The proposed configuration shows the capability of multilayer stack to achieve tunable dual-mode absorption. It is expected that the planar structure can be compatible with large-scale manufacturing and can have potential applications in color displays, multi-wavelength detection, and dual-mode absorbers.