Detection of terahertz radiation using topological graphene micro-nanoribbon structures with transverse plasmonic resonant cavities

TL;DR

This paper presents a novel graphene-based detector for terahertz radiation utilizing topological micro-nanoribbon structures with plasmonic resonances, achieving enhanced signal rectification and detection efficiency.

Contribution

It introduces a new graphene microribbon array design with transverse plasmonic cavities for efficient THz detection, leveraging nonlinear GNR elements for signal rectification.

Findings

Resonant amplification of rectified signals via plasmonic waves

Enhanced detector response due to transverse plasmonic oscillations

Feasible fabrication of GMR arrays with GNR bridges by perforation

Abstract

The lateral interdigital array of the graphene microribbons (GMRs) on the h-BN substrate connected by narrow graphene nanoribbon (GNR) bridges serves as an efficient detector of terahertz (THz) radiation. The detection is enabled by the nonlinear GNR elements providing the rectification of the THz signals. The excitation of plasmonic waves along the GMRs (transverse plasmonic oscillations) by impinging THz radiation can lead to a strong resonant amplification of the rectified signal current and substantial enhancement of the detector response. The GMR arrays with the GNR bridges s can be formed by the perforation of uniform graphene layers