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

S. Faure, C. Brimont, T. Guillet, T. Bretagnon, B. Gil, F. Médard, D. Lagarde, P. Disseix, J. Leymarie, J. Zúñiga-Pérez, M. Leroux, E. Frayssinet (+3 others)
2009 Applied Physics Letters  
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. 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
more » ... mission from this branch dominates the one from cavity-mode polaritons.
doi:10.1063/1.3232228 fatcat:r63f2pxnbrefvbbdrvrjd5syiu