Light-induced spectral diffusion in single self-assembled quantum dots

H. D. Robinson, B. B. Goldberg

Research output: Contribution to journalArticlepeer-review

128 Scopus citations

Abstract

Small ensembles of (Formula presented) self-assembled quantum dots have been studied at low temperatures using near-field scanning optical microscopy. We observe spectral diffusion in individual quantum dot luminescence lines. The phenomenon increases in magnitude with optical power density, but is not visible at low powers. We believe the spectral diffusion to be caused by long time-scale trapping and untrapping of charges created by photoionization or thermal ionization in the immediate vicinity of the quantum dots.

Original languageEnglish (US)
Pages (from-to)R5086-R5089
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume61
Issue number8
DOIs
StatePublished - 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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