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Temperature dependence of the upper-branch polariton population in an organic semiconductor microcavity

Coles, David M.; Michetti, Paolo; Clark, Caspar; Adawi, Ali M.; Lidzey, David G.

Authors

David M. Coles

Paolo Michetti

Caspar Clark

David G. Lidzey



Abstract

We explore the distribution of polaritons along the upper polariton branch of a strongly coupled organic-semiconductor microcavity as a function of temperature following nonresonant optical excitation. Measurements of polariton emission from a high-finesse cavity containing a thin film of a J-aggregated cyanine dye were performed as a function of external detection angle and temperature and compared with the results of detailed numerical simulations. We show that a full description of temperature-dependent upper-branch polariton emission can only be obtained by accounting for the interplay between two mechanisms that populate polariton states, namely, thermally assisted exciton scattering and direct radiative pumping of the photonic component of polariton states via the radiative decay of weakly coupled “reservoir” excitons. Our measurements provide a full description of the basic mechanisms at play in an organic microcavity, and may help guide the development of organic polariton-based devices.

Journal Article Type Article
Publication Date Nov 15, 2011
Journal Physical Review B - Condensed Matter and Materials Physics
Print ISSN 1098-0121
Electronic ISSN 1550-235X
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 84
Issue 20
Article Number ARTN 205214
Pages 205214-1 - 205214-8
APA6 Citation Coles, D. M., Michetti, P., Clark, C., Adawi, A. M., & Lidzey, D. G. (2011). Temperature dependence of the upper-branch polariton population in an organic semiconductor microcavity. Physical review B: Condensed matter and materials physics, 84(20), 205214-1 - 205214-8. doi:10.1103/PhysRevB.84.205214
DOI https://doi.org/10.1103/PhysRevB.84.205214
Keywords Electronic, Optical and Magnetic Materials; Condensed Matter Physics
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