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Stabilizing nuclear spins around semiconductor electrons via the interplay of optical coherent population trapping and dynamic nuclear polarization

A. R. Onur, J. P. de Jong, D. O'Shea, D. Reuter, A. D. Wieck, and C. H. van der Wal
Phys. Rev. B 93, 161204(R) – Published 14 April 2016

Abstract

We experimentally demonstrate how coherent population trapping (CPT) for donor-bound electron spins in GaAs results in autonomous feedback that prepares stabilized states for the spin polarization of nuclei around the electrons. CPT was realized by excitation with two lasers to a bound-exciton state. Transmission studies of the spectral CPT feature on an ensemble of electrons directly reveal the statistical distribution of prepared nuclear-spin states. Tuning the laser driving from blue to red detuned drives a transition from one to two stable states. Our results have importance for ongoing research on schemes for dynamic nuclear-spin polarization, the central spin problem, and control of spin coherence.

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  • Received 27 August 2015
  • Revised 31 March 2016

DOI:https://doi.org/10.1103/PhysRevB.93.161204

©2016 American Physical Society

Authors & Affiliations

A. R. Onur1,*, J. P. de Jong1, D. O'Shea1, D. Reuter2,†, A. D. Wieck2, and C. H. van der Wal1

  • 1Zernike Institute for Advanced Materials, University of Groningen, 9747AG Groningen, The Netherlands
  • 2Angewandte Festkörperphysik, Ruhr-Universität Bochum, D-44780 Bochum, Germany

  • *Corresponding author: a.r.onur@rug.nl
  • Present address: Department of Physics, University Paderborn, Warburger Straße 100, 30098 Paderborn, Germany.

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Vol. 93, Iss. 16 — 15 April 2016

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