Wide Angle Dynamically Tunable Enhanced Infrared Absorption on Large Area Nanopatterned Graphene

TL;DR

This paper demonstrates a method to significantly enhance infrared absorption in large-area nanopatterned graphene by exciting Dirac plasmons, with tunability achieved through structural and optical parameters.

Contribution

It introduces a novel design of hexagonal nanopatterned graphene with optical cavities to optimize plasmonic light absorption in the infrared range.

Findings

Enhanced infrared absorption via Dirac plasmon excitation

Influence of pattern dimensions and incident light parameters on absorption

Potential for tunable infrared photonic devices

Abstract

Enhancing light-matter interaction by exciting Dirac plasmons on nanopatterned monolayer graphene is an efficient route to achieve high infrared absorption. Here, we designed and fabricated the hexagonal planar arrays of nanohole and nanodisk with and without optical cavity to excite Dirac plasmons on the patterned graphene and investigated the role of plasmon lifetime, extinction cross-section, incident light polarization, the angle of incident of light and pattern dimensions on the light absorption spectra.