Ultralong temporal coherence in optically trapped exciton-polariton condensates

Abstract

We investigate an optically trapped exciton-polariton condensate and observe temporal coherence beyond 1~ns duration. Due to the reduction of the spatial overlap with the thermal reservoir of excitons, the coherence time of the trapped condensate is more than an order of magnitude longer than that of an untrapped condensate. This ultralong coherence enables high precision spectroscopy of the trapped condensate, and we observe periodic beats of the field correlation function due to a fine energy splitting of two polarization modes of the condensate. Our results are important for realizing polariton simulators with spinor condensates in lattice potentials.

arXiv comment8 pages, 7 figures

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• Room-temperature cavity exciton-polariton condensation in perovskite quantum dots
• Tracking quantum coherence in polariton condensates with time-resolved tomography
• Bogoliubov excitations of a polariton condensate in dynamical equilibrium with an incoherent reservoir
• Crossover from exciton-polariton condensation to photon lasing in an optical trap
• Narrow-linewidth exciton-polariton laser
• Self-organized PT-symmetry of exciton-polariton condensate in a double-well potential
• Optically trapped exciton-polariton condensates in a perovskite microcavity
• Quantum coherence of a long-lifetime exciton-polariton condensate
• Room-temperature polariton condensate in a two-dimensional hybrid perovskite