Dephasing and interaction of excitons CdSe/ZnSe islands

H. P. Wagner, H.-P. Tranitz, H. Preis, Wolfgang Langbein, Jørn Märcher Hvam

    Research output: Contribution to journalJournal articleResearchpeer-review


    The dephasing of excitons in self-organized CdSe/ZnSe islands grown by molecular-beam epitaxy is investigated using spectrally resolved four-wave mixing. A distribution of dephasing times is observed, indicating the existence of localized excitons with different relaxation times at comparable transition energies. Polarization-dependent measurements identify the formation of biexcitons. The observed large biexciton binding energy of 22meV increases with decreasing exciton energy, which is attributed to an increasing three-dimensional confinement.
    Original languageEnglish
    JournalJournal of Crystal Growth
    Pages (from-to)747-751
    Publication statusPublished - 2000

    Cite this