Evolution of temporal coherence in confined exciton-polariton condensates
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We study the influence of spatial confinement on the second-order temporal coherence of the emission from a semiconductor microcavity in the strong coupling regime. Provided by etched micropillars, the confinement has a favorable impact on the temporal coherence of solid state quasi-condensates that evolve in our device above threshold. By fitting the experimental data with a microscopic quantum theory based on a quantum jump approach, we scrutinize the influence of pump power and confinement and find that phonon-mediated transitions are enhanced in the case of a confined structure, in which the modes split into a discrete set. By increasing the pump power beyond the condensation threshold, temporal coherence significantly improves in devices with increased spatial confinement, as revealed in the transition from thermal to coherent statistics of the emitted light.
Klaas , M , Flayac , H , Amthor , M , Savenko , I G , Brodbeck , S , Ala-Nissila , T , Klembt , S , Schneider , C & Höfling , S 2017 , ' Evolution of temporal coherence in confined exciton-polariton condensates ' Physical Review Letters .
Physical Review Letters
© 2017, American Physical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version.
The authors would like to thank the State of Bavaria for financial support. T.A-N. has been supported in part by the Academy of Finland through its CoE grants 251748 and 284621. I.G.S. has been supported by IBS-R024-D1, the Australian Research Council's Discovery Projects funding scheme (project DE160100167), and the Dynasty Foundation.
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