Negetive mass trion polariton

ORAL

Abstract

Atomically thin monolayers of transition metal dichalcogenides supports strongly bound excitons in two dimensions. In this work we use monolayer of MoSe2 as an active material inside a planer microcavity structure to show strong coupling between exciton and cavity photon. Unintentional doping in the exfoliated monolayer results into formation of trions, the bound state of an electron and exciton. We observed an inverted trion dispersion with negative curvature near zero in-plane momentum. Our theoretical analysis show that such negative curvature in the dispersion or the negative mass can only arise due to electron mediated interaction between the lower exciton-polariton branch and the trion-polariton. Our work suggest a pathway for studying interesting regimes in quantum many-body physics yielding possible new phases of quantum matter.

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Presenters

  • Sajal Dhara

    Institute of Optics, University of Rochester, Univ of Rochester

Authors

  • Sajal Dhara

    Institute of Optics, University of Rochester, Univ of Rochester

  • Chitraleema Chakraborty

    Materials Science, University of Rochester, Material Science Program, University of Rochester

  • Kenneth Goodfellow

    Institute of Optics, University of Rochester

  • Liangyu Qiu

    Institute of Optics, University of Rochester, Univ of Rochester, Institute of Optics, Univ of Rochester

  • Trevor Oloughlin

    Institute of Optics, University of Rochester

  • Gary Wicks

    Institute of Optics, University of Rochester

  • Subhro Bhattacharjee

    ICTS, International Centre for Theoretical Sciences, Tata Institute of Fundamental Research

  • Nick Vamivakas

    Institute of Optics, Univ of Rochester, Institute of Optics, University of Rochester, Univ of Rochester