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

ORAL

Abstract

Single Te impurity centers in ZnSe were probed with time-resolved photoluminescence spectroscopy. Resolution-limited peaks with an ultra-low spatial density originate in the recombination of excitons deeply bound to single nearest-neighbor isoelectronic Te pairs. This interpretation is confirmed by ab-initio calculations. The peaks reveal anti-bunched photon emission and a doublet structure polarized along $[110]$ and $[\bar {1}10]$. 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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Authors

  • Andreas Muller

  • Pablo Bianucci

    University of Texas at Austin

  • Carlo Piermarocchi

    Michigan State University

  • Marco Fornari

    Central Michigan University

  • Ivan-Christophe Robin

  • Regis Andre

    Universite J. Fourier

  • Chih-Kang Shih

    Physics Department, The University of Texas at Austin, Austin, Texas, 78712, University of Texas at Austin, The University of Texas at Austin, Department of Physics, University of Texas at Austin