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