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Phonon interaction of single excitons and biexcitons

Gindele, F., Hild, K., Langbein, Wolfgang and Woggon, U. 1999. Phonon interaction of single excitons and biexcitons. Physical Review B 60 (4) , R2157-R2160. 10.1103/PhysRevB.60.R2157

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The exciton-phonon coupling of a single zero-dimensional exciton is studied in epitaxially grown CdSe/Zn1−xCdxSe quantum dot structures by analyzing its linewidth and phonon-assisted recombination. The single excitons do not couple to only a single phonon mode, but to a distribution of phonons, here consisting of the zone-center ZnSe longitudinal optic (LO) phonon and of mixed modes with an energy statistics centered between the ZnSe and CdSe LO phonon. Both exciton and corresponding biexciton reveal LO-phonon replica intensities of ∼3% of the respective zero-phonon emission. These similar LO-phonon coupling strengths are evidence of a reduced polarity of the exciton states within the biexciton as the result of exciton-exciton correlation.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: American Physical Society
ISSN: 0163-1829
Last Modified: 04 Jun 2017 08:01

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