Exciton-polariton Condensation in Single-shot Regime and Thomas-Fermi Limit
Bose-Einstein condensation (BEC) of exciton-polaritons has been in the forefront of studies on quantum fluids of light and matter since its observation in 2006. This spontaneous emergence of macroscopic coherence of quasiparticles in a solid-state device has attracted research in both fundamental science and applications. Fundamentally, exciton-polariton condensates are open-dissipative systems which lies between highly nonequilibrium photon lasers and thermalized ultracold atomic gas. Technologically, exciton-polaritons are scalable compared to its ultracold atomic counterparts due to its high-working temperature (10K to room temperature) and solid-state platform.
In this seminar I will give a short introduction on exciton-polariton condensates and present two sets of experiments we did at ANU: imaging single realizations of condensation, and driving the condensate to the Thomas-Fermi limit. These two experiments elucidate the nature of polariton condensation and the nonlinearity arising from polariton interactions.