Narrow (≈4 meV) inhomogeneous broadening and its correlation with confinement potential of pyramidal quantum dot arrays

K. Leifer, E. Pelucchi, Shinichi Watanabe, F. Michelini, B. Dwir, E. Kapon

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26 Citations (Scopus)

Abstract

The inhomogeneous broadening in the luminescence spectra of ordered arrays of pyramidal GaAsAlGaAs semiconductor quantum dots (QDs) was studied as a function of the dot size. Dot arrays with inhomogeneous broadening as small as 4.1 meV and a corresponding ground state to first excited state transition separation of 28 meV were obtained. By evaluating the QD energy levels using a multiband kp model, the authors estimated that the observed inhomogeneous broadening corresponds to dot height fluctuations of about 1-2 ML across the array.

Original languageEnglish
Article number081106
JournalApplied Physics Letters
Volume91
Issue number8
DOIs
Publication statusPublished - 2007
Externally publishedYes

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quantum dots
energy levels
luminescence
ground state
excitation

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Narrow (≈4 meV) inhomogeneous broadening and its correlation with confinement potential of pyramidal quantum dot arrays. / Leifer, K.; Pelucchi, E.; Watanabe, Shinichi; Michelini, F.; Dwir, B.; Kapon, E.

In: Applied Physics Letters, Vol. 91, No. 8, 081106, 2007.

Research output: Contribution to journalArticle

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AU - Kapon, E.

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