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

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

2009-05-27

arxiv.org/abs/0905.4351v2

Applied Physics Letters 95, 12 (2009) 121102

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1063/1.3232228

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 branch dominates the one from cavity-mode polaritons.

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