Confined Plasmons in Graphene Microstructures: Experiments and Theory

TL;DR

This paper investigates confined plasmon modes in graphene microstructures through experiments and models, revealing the significance of interactions among neighboring structures for understanding plasmon behavior.

Contribution

It provides the first combined experimental, analytical, and computational study of confined graphene plasmons, highlighting inter-structure interactions.

Findings

Good agreement between experiments and theory for plasmon modes

Interaction among neighboring graphene structures significantly affects plasmon behavior

Analytical and computational models effectively describe confined plasmon modes

Abstract

Graphene, a two-dimensional material with a high mobility and a tunable conductivity, is uniquely suited for plasmonics. The frequency dispersion of plasmons in bulk graphene has been studied both theoretically and experimentally, whereas no theoretical models have been reported and tested against experiments for confined plasmon modes in graphene microstructures. In this paper, we present experimental measurements as well as analytical and computational models for such confined modes. We compare experimental measurements with theory for plasmon modes in interacting arrays of graphene strips and demonstrate a good agreement. The comparison between experimental and theoretical results reveals the important role played by interaction among the plasmon modes of neighboring graphene structures.