Exciton dephasing in quantum dots due to LO-phonon coupling: an exactly solvable model

Muljarov, Egor A. ORCID: https://orcid.org/0000-0002-2878-4148 and Zimmermann, R. 2007. Exciton dephasing in quantum dots due to LO-phonon coupling: an exactly solvable model. Physical Review Letters (PRL) 98 , 187401. 10.1103/PhysRevLett.98.187401

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Abstract

It is widely believed that, due to its discrete nature, excitonic states in a quantum dot coupled to dispersionless longitudinal-optical (LO) phonons form everlasting mixed states (exciton polarons) showing no line broadening in the spectrum. This is indeed true if the model is restricted to a limited number of excitonic states in a quantum dot. We show, however, that extending the model to a large number of states results in LO phonon-induced spectral broadening and complete decoherence of the optical response.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	American Physical Society
ISSN:	0031-9007
Last Modified:	12 May 2023 05:20
URI:	https://orca.cardiff.ac.uk/id/eprint/1607

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