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Trions in GaAs quantum wells: Photoluminescence lineshape analysis

Esser, A., Runge, E., Zimmermann, R. and Langbein, Wolfgang Werner 2000. Trions in GaAs quantum wells: Photoluminescence lineshape analysis. physica status solidi (a) 178 (1) , pp. 489-494. 10.1002/1521-396X(200003)178:1<489::AID-PSSA489>3.0.CO;2-R

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Trion photoluminescence spectra were measured in undoped high-quality GaAs quantum wells. The lineshape is asymmetric with a temperature-dependent tail towards lower photon energies. We have solved numerically the trion Schrödinger equation in the quantum well and found good agreement for both the trion binding energy and the luminescence lineshape at different temperatures. To analyse the relative weight of trion and exciton emission, an equilibrium mass-action law for the respective densities is studied. Using calculated radiative lifetimes, the emission decay after pulsed excitation is found to deviate strongly from a single-exponential shape in case the trions are initially saturated.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: Wiley
ISSN: 1862-6319
Last Modified: 04 Jun 2017 08:01

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