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Published Online November 9, 2006
Science DOI: 10.1126/science.1133862

Reports

Submitted on August 14, 2006
Accepted on November 1, 2006

Nondestructive Optical Measurements of a Single Electron Spin in a Quantum Dot

J. Berezovsky 1, M. H. Mikkelsen 1, O. Gywat 1, N. G. Stoltz 1, L. A. Coldren 1, D. D. Awschalom 1*

1 Center for Spintronics and Quantum Computation, University of California, Santa Barbara, CA 93106, USA.

* To whom correspondence should be addressed.
D. D. Awschalom , E-mail: awsch{at}physics.ucsb.edu

Kerr rotation measurements on a single electron spin confined in a charge-tunable semiconductor quantum dot demonstrate a means to directly probe the spin off-resonance, thus minimally disturbing the system. Energy-resolved magneto-optical spectra reveal information about the optically-oriented spin polarization and the transverse spin lifetime of the electron as a function of the charging of the dot. These results represent progress towards the manipulation and coupling of single spins and photons for quantum information processing.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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Conditional Dynamics of Interacting Quantum Dots.
L. Robledo, J. Elzerman, G. Jundt, M. Atature, A. Hogele, S. Falt, and A. Imamoglu (2008)
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Picosecond Coherent Optical Manipulation of a Single Electron Spin in a Quantum Dot.
J. Berezovsky, M. H. Mikkelsen, N. G. Stoltz, L. A. Coldren, and D. D. Awschalom (2008)
Science 320, 349-352
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Science. ISSN 0036-8075 (print), 1095-9203 (online)