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Kinetics of the inner ring in the exciton emission pattern in coupled GaAs quantum wells

Hammack, A. T., Butov, L. V., Wilkes, Joe, Mouchliadis, Leonidas, Muljarov, Egor A., Ivanov, Alexei and Gossard, A. C. 2009. Kinetics of the inner ring in the exciton emission pattern in coupled GaAs quantum wells. Physical Review B: Condensed Matter and Materials Physics 80 (15) , 155331. 10.1103/PhysRevB.80.155331

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Abstract

We report on the kinetics of the inner ring in the exciton emission pattern. The formation time of the inner ring following the onset of the laser excitation is found to be about 30 ns. The inner ring is also found to disappear within 4 ns after the laser termination. The latter process is accompanied by a jump in the photoluminescence (PL) intensity. The spatial dependence of the PL jump indicates that the excitons outside of the region of laser excitation, including the inner ring region, are efficiently cooled to the lattice temperature even during the laser excitation. The ring formation and disappearance are explained in terms of exciton transport and cooling.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: American Physical Society
ISSN: 1098-0121
Last Modified: 23 Oct 2017 10:11
URI: http://orca-mwe.cf.ac.uk/id/eprint/27624

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