Probing exciton localization in non-polar GaN/AlN Quantum Dots by single dot optical spectroscopy

F. Rol; S. Founta; H. Mariette; B. Daudin; Le Si Dang; J. Bleuse; D. Peyrade; J. -M. Gerard; B. Gayral

doi:10.1103/PhysRevB.75.125306

Probing exciton localization in non-polar GaN/AlN Quantum Dots by single dot optical spectroscopy

Other Condensed Matter 2015-06-25 v1

Authors: F. Rol , S. Founta , H. Mariette , B. Daudin , Le Si Dang , J. Bleuse , D. Peyrade , J. -M. Gerard , B. Gayral

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Abstract

We present an optical spectroscopy study of non-polar GaN/AlN quantum dots by time-resolved photoluminescence and by microphotoluminescence. Isolated quantum dots exhibit sharp emission lines, with linewidths in the 0.5-2 meV range due to spectral diffusion. Such linewidths are narrow enough to probe the inelastic coupling of acoustic phonons to confined carriers as a function of temperature. This study indicates that the carriers are laterally localized on a scale that is much smaller than the quantum dot size. This conclusion is further confirmed by the analysis of the decay time of the luminescence.

Keywords

exciton localization GaN/AlN quantum dots single dot optical spectroscopy time-resolved photoluminescence microphotoluminescence spectral diffusion acoustic phonon coupling

Cite

@article{arxiv.cond-mat/0611625,
  title  = {Probing exciton localization in non-polar GaN/AlN Quantum Dots by single dot optical spectroscopy},
  author = {F. Rol and S. Founta and H. Mariette and B. Daudin and Le Si Dang and J. Bleuse and D. Peyrade and J. -M. Gerard and B. Gayral},
  journal= {arXiv preprint arXiv:cond-mat/0611625},
  year   = {2015}
}

Probing exciton localization in non-polar GaN/AlN Quantum Dots by single dot optical spectroscopy

Abstract

Keywords

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