Acoustic phonon broadening mechanism in single quantum dot emission

L. Besombes, K. Kheng, L. Marsal, and H. Mariette
Phys. Rev. B 63, 155307 – Published 27 March 2001
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Abstract

We study the effect of the exciton-acoustic-phonon coupling on the optical homogeneous line shape of confined zero-dimensional excitons and discuss the connection with the so-called pure dephasing effect. On increasing the temperature, the line shape progressively deviates from the expected Lorentzian profile, with the appearance of low energy acoustic-phonon sidebands. The non-Lorentzian line shape and its temperature dependence are theoretically modeled on the basis of the lattice relaxation due to the exciton-acoustic-phonon coupling. This gives a precise description of the underlying mechanism which controls the exciton dephasing.

  • Received 18 July 2000

DOI:https://doi.org/10.1103/PhysRevB.63.155307

©2001 American Physical Society

Authors & Affiliations

L. Besombes* and K. Kheng

  • CEA-Grenoble, Département de Recherche Fondamentale sur la Matière Condensée/SP2M, 17 avenue des Martyrs, 38054 Grenoble Cedex 9, France

L. Marsal and H. Mariette

  • Laboratoire de Spectrométrie Physique, Université J. Fourier, Grenoble I Boîte Postale 87, 38402 Saint Martin d’Hères Cedex, France

  • *Corresponding author. Electronic mail: lbesombes@cea.fr

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Vol. 63, Iss. 15 — 15 April 2001

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