Exciton-phonon interactions and exciton pure dephasing in lens-shaped quantum dots

I. V. Bondarev*, S. A. Maksimenko, G. Ya Slepyan, I. L. Krestnikov, A. Hoffmann

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We have investigated exciton-phonon coupling and a zero-phonon exciton absorption line shape for lens-shaped quantum dots (QDs). Such dots occur in quasi-monolayer semiconductor heterostructures due to the interfacial roughness making quasi-2D excitons localize in lens-shaped quantum dot-like islands. The lateral size dependence calculated of low-temperature Huang-Rhys factors indicates the enhancement of exciton-phonon coupling with decreasing the lateral size of the quasi-2D exciton localization area. The low-temperature zero-phonon line exhibits an essentially non-Lorentzian asymmetric shape with the asymmetry increasing with the decrease of temperature and the lateral size of the quasi-2D exciton localization area.

Original languageEnglish
Pages (from-to)1107-1110
Number of pages4
JournalMaterials Science and Engineering C
Volume23
Issue number6-8
DOIs
StatePublished - 15 Dec 2003
Externally publishedYes

Funding

FundersFunder number
Foundation for Basic Research
North Atlantic Treaty Organization972614
National Academy of Sciences of ArmeniaF02R-047, F01-176

    Keywords

    • Exciton luminescence
    • Phonon
    • Quantum dots and islands

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