title: Polariton Z topological insulator.
abstract: We demonstrate that honeycomb arrays of microcavity pillars behave as an optical-frequency two-dimensional photonic topological insulator. We show that the interplay between the photonic spin-orbit coupling natively present in this system and the Zeeman splitting of exciton polaritons in external magnetic fields leads to the opening of a nontrivial gap characterized by a C=±2 set of band Chern numbers and to the formation of topologically protected one-way edge states.
authors.affiliation: Institut Pascal, PHOTON-N2, Université Clermont Auvergne, Blaise Pascal University, CNRS, 24 Avenue des Landais, 63177 Aubière Cedex, France.
authors.forename: A V
authors.initials: AV
authors.lastname: Nalitov
authors.affiliation: Institut Pascal, PHOTON-N2, Université Clermont Auvergne, Blaise Pascal University, CNRS, 24 Avenue des Landais, 63177 Aubière Cedex, France.
authors.forename: D D
authors.initials: DD
authors.lastname: Solnyshkov
authors.affiliation: Institut Pascal, PHOTON-N2, Université Clermont Auvergne, Blaise Pascal University, CNRS, 24 Avenue des Landais, 63177 Aubière Cedex, France.
authors.forename: G
authors.initials: G
authors.lastname: Malpuech