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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2007

Temperature dependence of the zero-phonon linewidth in quantum dots: An effect of the fluctuating environment

Ivan Favero
Alice Berthelot
Christophe Voisin
Philippe Roussignol
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Robson Ferreira
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Jean-Michel Gérard

Résumé

We report systematic measurements on the broadening of the emission spectrum of single quantum dots as a function of temperature and incident power. Spectral diffusion effects in the motional narrowing regime provide a quantitative interpretation of our experimental results. We show that, at low incident power, the thermal activation of spectral diffusion results in a Lorentzian zero-phonon line with a width that increases linearly with temperature. Our study provides a unified interpretation to the widely debated issue of the dispersion of the data on the temperature dependence of this zero-phonon linewidth. Our explanation is based on an original model where acoustic phonons interact with carriers outside the quantum dot.
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Dates et versions

hal-00284909 , version 1 (04-06-2008)

Identifiants

  • HAL Id : hal-00284909 , version 1

Citer

Ivan Favero, Alice Berthelot, Guillaume Cassabois, Christophe Voisin, Claude Delalande, et al.. Temperature dependence of the zero-phonon linewidth in quantum dots: An effect of the fluctuating environment. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2007, 75, pp.073308. ⟨hal-00284909⟩
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