Rectification and bolometric terahertz radiation detectors based on perforated graphene structures exhibiting plasmonic resonant response

Abstract

We propose and evaluate the characteristics of the terahertz (THz) detectors based on perforated graphene layers (PGLs). The PGL structures constitute the interdigital in-plane arrays of the graphene microribbons (GMRs) connected by the sets of narrow constrictions, which form the graphene nanoribbon bridges (GNRs). The PGL detector operation is associated with the rectification and hot-carrier bolometric mechanisms. The excitation of plasmonic oscillations in the GMR-GNR arrays can reinforce these mechanisms. The room-temperature PGL detector responsivity and detectivity are calculated as a function of radiation frequency and device structure parameters. The effects of the rectification and hot-carrier mechanisms are compared. The PGL THz detectors under consideration can exhibit highly competitive values of responsivity and detectivity.