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Applied Physics Letters / Volume 95 / Issue 12 / LASERS, OPTICS, AND OPTOELECTRONICS

Appl. Phys. Lett. 95, 121102 (2009); http://dx.doi.org/10.1063/1.3232228 (3 pages)

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

S. Faure1, C. Brimont1, T. Guillet1, T. Bretagnon1, B. Gil1, F. Médard2, D. Lagarde2, P. Disseix2, J. Leymarie2, J. Zúñiga-Pérez3, M. Leroux3, E. Frayssinet3, J. C. Moreno3, F. Semond3, and S. Bouchoule4

1GES, UMR5650, Université Montpellier 2–CNRS, Place E. Bataillon, F-34095 Montpellier, France
2LASMEA, UMR 6602, UBP–CNRS, 24 Avenue des Landais, F-63177 Aubière Cedex, France
3CRHEA–CNRS, Rue Bernard Grégory, F-06560 Valbonne, France
4LPN–CNRS, Route de Nozay, F-91460 Marcoussis, France

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(Received 28 May 2009; accepted 30 August 2009; published online 21 September 2009)

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.

© 2009 American Institute of Physics

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KEYWORDS and PACS

Keywords

excitons, II-VI semiconductors, microcavities, photoluminescence, polaritons, wide band gap semiconductors, zinc compounds

PACS

  • 71.36.+c

    Polaritons (including photon-phonon and photon-magnon interactions)

  • 78.55.Et

    II-VI semiconductors

  • 71.35.-y

    Excitons and related phenomena

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3232228

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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