Phonon interaction of single excitons and biexcitons

Gindele, F., Hild, K., Langbein, Wolfgang ORCID: https://orcid.org/0000-0001-9786-1023 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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Abstract

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:	Schools > Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	American Physical Society
ISSN:	0163-1829
Last Modified:	28 Oct 2022 08:41
URI:	https://orca.cardiff.ac.uk/id/eprint/71729

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