Time-resolved photoluminescence spectroscopy of individual Te impurity centers in ZnSe

A. Muller, P. Bianucci, C. Piermarocchi, M. Fornari, I. C. Robin, R. André, C. K. Shih

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Tellurium impurity centers in ZnSe were individually probed with time-resolved photoluminescence (PL) spectroscopy. Resolution-limited peaks with an ultralow spatial density originate in the recombination of excitons deeply bound to isolated nearest-neighbor isoelectronic Te pairs (Te2). This interpretation is supported by ab initio calculations. The peaks reveal antibunched photon emission and a doublet structure polarized along [110] and [1̄ 10]. The temperature dependence of the time-resolved PL decay exposes the dark excitonic states which indirectly affect the radiative recombination of single fine-structure split excitons.

Original languageEnglish
Article number081306
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number8
StatePublished - 2006


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