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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 2 — Feb. 1, 2012
  • pp: A119–A126

Persistent optical nuclear spin narrowing in a singly charged InAs quantum dot

Bo Sun, Wang Yao, Xiaodong Xu, Allan S. Bracker, Daniel Gammon, L. J. Sham, and Duncan Steel  »View Author Affiliations


JOSA B, Vol. 29, Issue 2, pp. A119-A126 (2012)
http://dx.doi.org/10.1364/JOSAB.29.00A119


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Abstract

We review the investigation of the hole-assisted dynamical nuclear spin polarization mechanism in a singly charged InAs quantum dot. Using coherent dark state spectroscopy, we measure the locking of the Overhauser field to a value determined only by the laser frequencies. Importantly, we review data that the locking effect can suppress nuclear spin fluctuations. We determine the onset time of the nuclear spin narrowing effect and its persistence absent laser interactions by directly measuring the enhancement of the electron spin coherence. This nuclear field locking effect can be explained in terms of an anisotropic hyperfine coupling between the hole spin and the nuclear spins.

© 2012 Optical Society of America

OCIS Codes
(270.1670) Quantum optics : Coherent optical effects
(300.6250) Spectroscopy : Spectroscopy, condensed matter

History
Original Manuscript: October 17, 2011
Manuscript Accepted: November 23, 2011
Published: February 1, 2012

Citation
Bo Sun, Wang Yao, Xiaodong Xu, Allan S. Bracker, Daniel Gammon, L. J. Sham, and Duncan Steel, "Persistent optical nuclear spin narrowing in a singly charged InAs quantum dot," J. Opt. Soc. Am. B 29, A119-A126 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-2-A119


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