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Ultrafast polariton relaxation dynamics in an organic semiconductor microcavity

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

Authors

T. Virgili

D. Coles

C. Clark

P. Michetti

S. K. Rajendran

D. Brida

D. Polli

G. Cerullo

D. G. Lidzey



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.

Journal Article Type Article
Publication Date Jun 20, 2011
Journal PHYSICAL REVIEW B
Print ISSN 1098-0121
Electronic ISSN 1550-235X
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 83
Issue 24
Article Number ARTN 245309
Pages 245309
APA6 Citation Virgili, T., Coles, D., Adawi, A. M., Clark, C., Michetti, P., Rajendran, S. K., …Lidzey, D. G. (2011). Ultrafast polariton relaxation dynamics in an organic semiconductor microcavity. Physical review B: Condensed matter and materials physics, 83(24), 245309. doi:10.1103/PhysRevB.83.245309
DOI https://doi.org/10.1103/PhysRevB.83.245309
Keywords Electronic, Optical and Magnetic Materials; Condensed Matter Physics
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