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American Institute of Physics, Applied Physics Letters, 12(95), p. 121102

DOI: 10.1063/1.3232228

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Relaxation and emission of Bragg-mode and cavity-mode polaritons in a ZnO microcavity at room temperature

Journal article published in 2009 by Stéphane Faure, Christelle Brimont, Thierry Guillet ORCID, T. Bretagnon, B. Gil, F. Médard, François Médard, D. Lagarde, Pierre Disseix, Joel Leymarie, Jesús Zúñiga-Pérez, Mathieu Leroux, Eric Frayssinet, Jean-Christophe Moreno, Fabrice Semond and other authors.
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This paper is available in a repository.

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Abstract

The strong coupling regime in a ZnO microcavity is investigated through room temperature photoluminescence and reflectivity experiments. The simultaneous strong coupling of excitons to the cavity mode and the first Bragg mode is demonstrated at room temperature. The polariton relaxation is followed as a function of the excitation density, showing a nonthermal polariton distribution. A relaxation bottleneck is evidenced in the Bragg-mode polariton branch. It is partly broken under strong excitation density, so that the emission from this branch dominates the one from cavity-mode polaritons.