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Towards twisted, topological, and quantum graphene plasmonics

A. Octávio Soares, Nuno M. R. Peres

Abstract

In this article, we analyze the quantum and topological properties of graphene-based plasmonic systems. We consider the following plasmonic materials: single-layer graphene, twisted bilayer graphene, and other graphene stackings, as well as the following architectures: graphene-based gratings, grids, chains of graphene disks, and the kagomé lattice.

Towards twisted, topological, and quantum graphene plasmonics

Abstract

In this article, we analyze the quantum and topological properties of graphene-based plasmonic systems. We consider the following plasmonic materials: single-layer graphene, twisted bilayer graphene, and other graphene stackings, as well as the following architectures: graphene-based gratings, grids, chains of graphene disks, and the kagomé lattice.

Paper Structure

This paper contains 8 sections, 1 figure.

Table of Contents

  1. A short introduction to plasmonics
  2. A brief note on topology
  3. The graphene case study
  4. Plasmonic crystals
  5. Topological graphene plasmons
  6. Quantum plasmons in graphene
  7. Open system effects on graphene plasmons
  8. Outlook

Figures (1)

  • Figure 1: Systems discussed in the text. a) Twisted bilayer graphene (TBG) with relative angle $\theta=4.1\degree$. b) Basketweave kagomé lattice. c) Graphene plasmonic crystal realizing an SSH-like model via periodic metallic rods above a graphene sheet. d) Evolution of plasmonic energy levels with modulation width in a Kronig–Penney model. In the bulk, gap closing leads to parity exchange (band inversion). In a finite system, this corresponds to the emergence of mid-gap edge states, consistent with bulk–edge correspondence. e) Two-level systems coupled through graphene surface plasmon-polaritons (GSPPs).