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Time-Resolved Spectroscopy of Single Excitons Bound to Pairs of Te Isoelectronic Impurity Centers in ZnSe

A. Muller·P. Bianucci·C. Piermarocchi·M. Fornari·I. C. Robin·R. Andre·C. K. Shih
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Abstract

Tellurium impurity centers in ZnSe were individually probed with time-resolved photoluminescence (PL) spectroscopy. Resolution-limited peaks with an ultra-low spatial density originate in the recombination of excitons deeply bound to isolated nearest-neighbor isoelectronic Te pairs (Te2). This interpretation is confirmed by ab-initio calculations. The peaks reveal anti-bunched photon emission and a doublet structure polarized along [110] and [-110]. We analyze the time-resolved PL decay to clarify the role of the dark states in the spin relaxation and radiative recombination of single fine-structure split excitons.

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A. Muller, P. Bianucci, C. Piermarocchi, M. Fornari, I. C. Robin, R. Andre, C. K. Shih. 2005-03-17. Time-Resolved Spectroscopy of Single Excitons Bound to Pairs of Te Isoelectronic Impurity Centers in ZnSe. https://arxiv.org/abs/cond-mat/0503419

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