Work

Topological Moiré Polaritons

Year: 2024

Type: article

Abstract: The combination of an in-plane honeycomb potential and of a photonic spin-orbit coupling (SOC) emulates a photonic or polaritonic analog of bilayer graphene. We show that modulating the SOC magnitude allows us to change the overall lattice periodicity, emulating any type of moiré-arranged bilayer graphene with unique all-optical access to the moiré band topology. We show that breaking the time-reversal symmetry by an effective exciton-polariton Zeeman splitting opens a large topological gap in the array of moiré flat bands. This gap contains one-way topological edge states whose constant group velocity makes an increasingly sharp contrast with the flattening moiré bands.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.133.266602

Authors: I. Septembre, C. Leblanc, D. D. Solnyshkov, G. Malpuech

Institutions: Institut Pascal, Clermont Auvergne INP, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Grenoble, Institut Universitaire de France

Language: English

Topic: Topological Materials and Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Agence Nationale de la Recherche, Horizon 2020 Framework Programme

Awards: Réseau national sur GaN, G3723966580, New concepts for waveguide micro- and nano-lasers