Whilst the photonic component of exciton-polaritons has been determined using angle-resolved photoluminescence measurements, the excitonic component has seldom been directly observed. To provide a coherent and complete picture of both elements, THz-TDS may be used alongside PL measurements to determine the excitonic (and therefore polaritonic) populations as a function of timeAbout the presenter
Mitko Oldfield is an experimental physicist specialising in terahertz time-domain spectroscopy and exciton-polariton condensation, working with Dr 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.