Cascaded exciton emission of an individual strain-induced quantum dot

F.J.R. Schülein, A. Laucht, J. Riikonen, M. Mattila, M. Sopanen, H. Lipsanen, J.J. Finley, A. Wixforth, H.J. Krenner

    Research output: Contribution to journalArticleScientificpeer-review

    6 Citations (Scopus)
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    Single strain-induced quantum dots are isolated for optical experiments by selective removal of the inducing InP islands from the sample surface. Unpolarized emission of single exciton, biexciton, and triexciton transitions are identified by power-dependent photoluminescence spectroscopy. Employing time-resolved experiments performed at different excitation powers, we find a pronounced shift of the rise and decay times of these different transitions as expected from cascaded single photon emissions. Good agreement is found for a rate equation model for a three step cascade.
    Original languageEnglish
    Article number083122
    Pages (from-to)1-3
    Number of pages3
    JournalApplied Physics Letters
    Issue number8
    Publication statusPublished - 2009
    MoE publication typeA1 Journal article-refereed

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