Interdot excitation transfer and spectral diffusion: Consequences of wetting layer potential fluctuations in self-assembled quantum dots

Hans D. Robinson, Bennett B. Goldberg

Research output: Contribution to journalConference article

6 Scopus citations

Abstract

A thin quantum well called the wetting layer is created whenever self-assembled quantum dots are fabricated. The wetting layer is highly non-uniform, thereby producing potential fluctuations that influence the physics of the quantum dots. Here, we report several effects that are caused by such fluctuations. In particular, light-induced spectral diffusion on a very long time scale and interdot excitation transfer are observed in a sample of InAlAs quantum dots. We show that the existence of both these phenomena is due to the wetting layer fluctuations.

Original languageEnglish (US)
Pages (from-to)444-448
Number of pages5
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume6
Issue number1
DOIs
StatePublished - Jan 1 2000
Event13th International Conference on the Electronic Properties of Two-Dimensional Systems (EP2DS-13) - Ottawa, Ont, Can
Duration: Aug 1 1999Aug 6 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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