Erland, J., Mizeikis, V., Langbein, Wolfgang Werner ![]() |
Abstract
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 |
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Date Type: | Publication |
Status: | Published |
Schools: | Physics and Astronomy |
Subjects: | Q Science > QC Physics |
Publisher: | Wiley |
ISSN: | 1521-3951 |
Last Modified: | 28 Oct 2022 08:39 |
URI: | https://orca.cardiff.ac.uk/id/eprint/71611 |
Citation Data
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