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Proceedings Paper

Dynamic nuclear polarization in a charged quantum dot induced by the AC Stark effect
Author(s): T. A. Wilkinson; D. J. Cottrill; J. M. Cramlet; C. E. Maurer; C. J. Flood; A. S. Bracker; M. Yakes; D. Gammon; E. B. Flagg
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Paper Abstract

The energy levels of an optically active quantum system can be shifted via the AC Stark effect by applying a strong, far-detuned laser. In addition to achieving a spin-selective AC Stark shift larger than 20 GHz, we observe a small Overhauser shift of approximately 1 GHz in a single negatively charged InGaAs quantum dot. We attribute this small shift to dynamic nuclear polarization via electron spin pumping induced by the high power, although far-detuned AC Stark laser. Low power scans reveal two regimes: high power where the frequency shift is linear in AC Stark laser power, and low power where the behavior is non-linear. Linewidth analysis provides a method to quantify the effect of the AC Stark laser on the nuclear spin environment, which in turn affects the quantum dot transitions.

Paper Details

Date Published: 3 September 2019
PDF: 9 pages
Proc. SPIE 11091, Quantum Nanophotonic Materials, Devices, and Systems 2019, 110910I (3 September 2019); doi: 10.1117/12.2529455
Show Author Affiliations
T. A. Wilkinson, West Virginia Univ. (United States)
D. J. Cottrill, West Virginia Univ. (United States)
J. M. Cramlet, West Virginia Univ. (United States)
C. E. Maurer, West Virginia Univ. (United States)
C. J. Flood, West Virginia Univ. (United States)
A. S. Bracker, U.S. Naval Research Lab. (United States)
M. Yakes, U.S. Naval Research Lab. (United States)
D. Gammon, U.S. Naval Research Lab. (United States)
E. B. Flagg, West Virginia Univ. (United States)

Published in SPIE Proceedings Vol. 11091:
Quantum Nanophotonic Materials, Devices, and Systems 2019
Cesare Soci; Matthew T. Sheldon; Mario Agio, Editor(s)

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