Size quantization patterns in self-assembled InAs/GaAs quantum dots

M. Colocci, F. Bogani, L. Carraresi, R. Mattolini, A. Bosacchi, S. Franchi, P. Frigeri, S. Taddei, M. Rosa-Clot

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Molecular beam epitaxy has been used for growing self-assembled InAs quantum dots. A continuous variation of the InAs average coverage across the sample has been obtained by properly aligning the (001) GaAs substrate with respect to the molecular beam. Excitation of a large number of dots (laser spot diameter ≈ 100 μm) results in structured photoluminescence spectra; a clear quantization of the dot sizes is deduced from the distinct luminescence bands separated in energy by an average spacing of 20-30 meV. We ascribe the individual bands of the photoluminescence spectrum after low excitation to families of dots with roughly the same diameter and heights differing by one monolayer.

Original languageEnglish
Pages (from-to)81-84
Number of pages4
JournalSuperlattices and Microstructures
Volume22
Issue number1
DOIs
Publication statusPublished - 1997

Fingerprint

Semiconductor quantum dots
Photoluminescence
quantum dots
photoluminescence
Molecular beams
Molecular beam epitaxy
molecular beams
excitation
Luminescence
Monolayers
molecular beam epitaxy
spacing
luminescence
Lasers
Substrates
lasers
gallium arsenide
indium arsenide
energy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Colocci, M., Bogani, F., Carraresi, L., Mattolini, R., Bosacchi, A., Franchi, S., ... Rosa-Clot, M. (1997). Size quantization patterns in self-assembled InAs/GaAs quantum dots. Superlattices and Microstructures, 22(1), 81-84. https://doi.org/10.1006/spmi.1996.0351

Size quantization patterns in self-assembled InAs/GaAs quantum dots. / Colocci, M.; Bogani, F.; Carraresi, L.; Mattolini, R.; Bosacchi, A.; Franchi, S.; Frigeri, P.; Taddei, S.; Rosa-Clot, M.

In: Superlattices and Microstructures, Vol. 22, No. 1, 1997, p. 81-84.

Research output: Contribution to journalArticle

Colocci, M, Bogani, F, Carraresi, L, Mattolini, R, Bosacchi, A, Franchi, S, Frigeri, P, Taddei, S & Rosa-Clot, M 1997, 'Size quantization patterns in self-assembled InAs/GaAs quantum dots', Superlattices and Microstructures, vol. 22, no. 1, pp. 81-84. https://doi.org/10.1006/spmi.1996.0351
Colocci, M. ; Bogani, F. ; Carraresi, L. ; Mattolini, R. ; Bosacchi, A. ; Franchi, S. ; Frigeri, P. ; Taddei, S. ; Rosa-Clot, M. / Size quantization patterns in self-assembled InAs/GaAs quantum dots. In: Superlattices and Microstructures. 1997 ; Vol. 22, No. 1. pp. 81-84.
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