3D versus 1D quantum confinement in coherently strained CdS/ZnS quantum structures

U. Woggon, F. Gindele, W. Petri, M. Hetterich, M. Grün, C. Klingshirn, Wolfgang Werner Langbein, Jørn Märcher Hvam, T Kümmel, G. Bacher, A. Forchel

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Monolayer fluctuations in ultrathin, coherently strained CdS/ZnS quantum structures result in a very strong localization of excitons. The deepest localized excitons can be considered as individual, decoupled and three-dimensionally confined. Consequently, fingerprints of zero-dimensionality are found in the optical spectra like single, ultranarrow luminescence lines in micro-photoluminescence and spectrally broad optical gain in the deep blue spectral range. The exchange splitting is proven and a strong enhancement over the bulk value is observed.
    Original languageEnglish
    JournalIPPS physica status solidi (b)
    Volume206
    Issue number1
    Pages (from-to)501-506
    ISSN0370-1972
    DOIs
    Publication statusPublished - 1998

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