Mitko Oldfield, Monash
Exciton-polaritons are one avenue for realising superfluid flow and next-generation circuits, due to their ability to form a Bose-Einstein condensate at room temperature.
Here, I discuss the formation of exciton-polaritons in spin-coated lead halide perovskite microcavities, as well as room temperature polariton condensation at a low fluence threshold. These systems have shown repeated condensation, even when pushed to fluences 10 times their threshold.
About the presenter
Mitko Oldfield is an experimental physicist specialising in terahertz time-domain spectroscopy and exciton-polariton condensation, working with A/Prof Agustin Schiffrin and Dr Gary Beane at Monash University within FLEET’s research theme 2 and research theme 3. Mikto’s research focuses on forming a polariton condensate in high Q-factor microcavities through the use of a terahertz pumping beam generated via optical rectification. The aim is a polariton condensate that is coherent both spatially and temporally in the cryogenic regime, with the potential of translating this to room temperature through the use of perovskite-based microcavities. Polariton condensation can lead to polariton lasing, a substitute for photon lasing which promises a lasing threshold two orders of magnitude lower, as there is no requirement for population inversion.