Anomalous dispersion of microcavity trion-polaritons

作者:Dhara S; Chakraborty C; Goodfellow K M; Qiu L; O'Loughlin T A; Wicks G W; Bhattacharjee Subhro; Vamivakas A N
来源:Nature Physics, 2018, 14(2): 130-+.
DOI:10.1038/NPHYS4303

摘要

The strong coupling of excitons to optical cavities has provided new insights into cavity quantum electrodynamics as well as opportunities to engineer nanoscale light-matter interactions(1-6). Here we study the interaction between out-of-equilibrium cavity photons and both neutral and negatively charged excitons, by embedding a single layer of the atomically thin semiconductor molybdenum diselenide in a monolithic optical cavity based on distributed Bragg reflectors. The interactions lead to multiple cavity polariton resonances and anomalous band inversion for the lower, trion-derived, polariton branch-the central result of the present work. Our theoretical analysis reveals that many-body effects in an out-of-equilibrium setting result in an effective level attraction between the exciton-polariton and trion-polariton accounting for the experimentally observed inverted trion-polariton dispersion. Our results suggest a pathway for studying interesting regimes in quantum many-body physics yielding possible new phases of quantum matter(7-11) as well as fresh possibilities for polaritonic device architectures(12-15).

  • 出版日期2018-2