Controlled Ordering of Topological Charges in an Exciton-Polariton Chain

T. Gao, O. A. Egorov, E. Estrecho, K. Winkler, M. Kamp, C. Schneider, S. Höfling, A. G. Truscott, E. A. Ostrovskaya

    Research output: Contribution to journalArticlepeer-review

    31 Citations (Scopus)

    Abstract

    We demonstrate, experimentally and theoretically, controlled loading of an exciton-polariton vortex chain into a 1D array of trapping potentials. Switching between two types of vortex chains, with topological charges of the same or alternating signs, is achieved by appropriately shaping an off-resonant pump beam that drives the system to the regime of bosonic condensation. In analogy to spin chains, these vortex sequences realize either a "ferromagnetic" or an "antiferromagnetic" order, whereby the role of spin is played by the orbital angular momentum. The ferromagnetic ordering of vortices is associated with the formation of a persistent chiral current. Our results pave the way for the controlled creation of nontrivial distributions of orbital angular momentum and topological order in a periodic exciton-polariton system.

    Original languageEnglish
    Article number225302
    JournalPhysical Review Letters
    Volume121
    Issue number22
    DOIs
    Publication statusPublished - 27 Nov 2018

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