Nonreciprocal transport of exciton polaritons in a non-Hermitian chain

S. Mandal, R. Banerjee, Elena A. Ostrovskaya, T. C.H. Liew

    Research output: Contribution to journalArticlepeer-review

    43 Citations (Scopus)

    Abstract

    We consider exciton polaritons in a zigzag chain of coupled elliptical micropillars subjected to incoherent excitation. The driven-dissipative nature of the system along with the naturally present polarization splitting inside the pillars gives rise to nonreciprocal dynamics, which eventually leads to the non-Hermitian skin effect, where all the modes of the system collapse to one edge. As a result, the polaritons propagate only in one direction along the chain, independent of the excitation position, and the propagation in the opposite direction is suppressed. The system shows robustness against disorder and, using the bistable nature of polaritons to encode information, we show one-way information transfer. This paves the way for compact and robust feedback-free one-dimensional polariton transmission channels without the need for external magnetic field, which are compatible with proposals for polaritonic circuits.

    Original languageEnglish
    Article number123902
    JournalPhysical Review Letters
    Volume125
    Issue number12
    DOIs
    Publication statusPublished - Sept 2020

    Fingerprint

    Dive into the research topics of 'Nonreciprocal transport of exciton polaritons in a non-Hermitian chain'. Together they form a unique fingerprint.

    Cite this