Ultrafast polariton relaxation dynamics in an organic semiconductor microcavity

T. Virgili*, D. Coles, A. M. Adawi, C. Clark, P. Michetti, S. K. Rajendran, D. Brida, D. Polli, G. Cerullo, D. G. Lidzey

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

75 Citations (Scopus)

Abstract

We study an organic semiconductor microcavity operating in the strong-coupling regime using fs pump-probe spectroscopy. By probing the induced absorption associated with the one-exciton to two-exciton transition, we are able to characterize the time-dependent population densities of states in the upper- and lower-polariton branches following impulsive excitation. We model the time-dependent polariton dynamics and provide direct evidence of a scattering process that returns upper-branch cavity polaritons to states in the exciton reservoir having a rate of (150 fs)-1. A slower process similarly populates lower-branch polaritons by return scattering from the exciton reservoir.

Original languageEnglish
Article number245309
JournalPhysical Review. B, Condensed matter and materials physics
Volume83
Issue number24
DOIs
Publication statusPublished - 20 Jun 2011

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