Subradiance-enhanced excitation transfer between dipole-coupled nanorings of quantum emitters

Maria Moreno-Cardoner, David Plankensteiner, Laurin Ostermann, Darrick E. Chang, Helmut Ritsch

    Research output: Contribution to journalArticleResearch

    27 Citations (Scopus)


    © 2019 American Physical Society. A ring of dipole-coupled quantum emitters positioned at subwavelength distances possesses only a few radiant but many subradiant collective excitations with lifetimes growing exponentially with the atom number. These exhibit a three-dimensionally confined spatial radiation field pattern and form nanoscale high-Q optical resonators. Tailoring size, orientation, and distance between two rings allows for increasing the ratio of coherent ring-to-ring energy transfer versus free-space emission by orders of magnitude. In particular, the more dark and delocalized over several sites are excitons, the higher is their fidelity for transport to a second ring.
    Original languageEnglish
    Article number023806
    JournalPhysical Review A
    Publication statusPublished - 7 Aug 2019


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