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Seeding of polariton stimulation in a homogeneously broadened microcavity

Erland, J., Mizeikis, V., Langbein, Wolfgang Werner, Jensen, J. R., Mortensen, N. A. and Hvam, J. M. 2000. Seeding of polariton stimulation in a homogeneously broadened microcavity. physica status solidi (b) 221 (1) , pp. 115-120. 10.1002/1521-3951(200009)221:1<115::AID-PSSB115>3.0.CO;2-9

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In time-resolved light emission from a high-quality semiconductor microcavity after pulsed excitation suitable for angle-resonant polariton–polariton scattering on the lower-polariton branch, we find strong evidence for final-state stimulation of this process. The self-stimulated emission, following single-pulse excitation, appears on a fast time scale of only a few tens of ps with a maximum at 15 ps. This is in striking contrast to the photoluminescence decay time of 110 ps observed in the low-density limit. By injection of polaritons into the final state by a seeding pulse, the dynamics and the intensity of this emission can be controlled. The time-resolved data and the density dependences are in agreement with a rate equation model neglecting polarization mixing effects. This model gives a coupling coefficient of bLP,k=0 = 2.4 × 10—9 cm4 s—1 for the stimulated angle-resonant polariton–polariton scattering process.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: Wiley
ISSN: 1521-3951
Last Modified: 04 Jun 2017 08:01

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