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

Patton, Brian, Langbein, Wolfgang Werner ORCID: https://orcid.org/0000-0001-9786-1023 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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Abstract

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:	24 Oct 2022 11:39
URI:	https://orca.cardiff.ac.uk/id/eprint/48860

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