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Trion, biexciton, and exciton dynamics in single self-assembled CdSe quantum dots

Patton, Brian, Langbein, Wolfgang Werner and Woggon, U. 2003. Trion, biexciton, and exciton dynamics in single self-assembled CdSe quantum dots. Physical Review B Condensed Matter and Materials Physics 68 (12) , 125316. 10.1103/PhysRevB.68.125316

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We present an analysis of time- and polarization-resolved data taken in microphotoluminescence experiments on individual CdSe/ZnSe quantum dots grown by molecular beam epitaxy. The identification of individual dots was performed by a spectral jitter correlation technique and by their polarization properties and density dependences. Decay times are given for exciton, trion, and biexciton states and evidence is shown for a spin-relaxation-limited energy relaxation of the trion. For the bright-exciton state the temperature dependence of the decay time is studied and a repopulation from the dark-exciton state is observed. Trion binding energies of 15–22 meV and biexciton binding energies of 19–26 meV are found.

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: 04 Jun 2017 05:08

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