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Science 20 November 1998:
Vol. 282. no. 5393, pp. 1473 - 1476
DOI: 10.1126/science.282.5393.1473
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Reports
Coherent Optical Control of the Quantum State of a Single Quantum Dot
N. H. Bonadeo,
J. Erland,
D. Gammon,
D. Park,
D. S. Katzer,
D. G. Steel
*
Picosecond optical excitation was used to coherently control the
excitation in a single quantum dot on a time scale that is short
compared with the time scale for loss of quantum coherence. The
excitonic wave function was manipulated by controlling the optical
phase of the two-pulse sequence through timing and polarization. Wave
function engineering techniques, developed in atomic and molecular
systems, were used to monitor and control a nonstationary quantum
mechanical state composed of a superposition of eigenstates. The
results extend the concept of coherent control in semiconductors to the
limit of a single quantum system in a zero-dimensional quantum dot.
N. H. Bonadeo, Harrison M. Randall Laboratory of Physics and
Center for Ultrafast Optical Science, University of Michigan, Ann
Arbor, MI, 48109, USA. J. Erland, Harrison M. Randall Laboratory of
Physics, University of Michigan, Ann Arbor, MI, 48109, USA. D. Gammon,
D. S. Katzer, D. Park, Naval Research Laboratory, Washington, DC
20375, USA. D. G. Steel, Harrison M. Randall Laboratory of Physics
and Electrical Engineering and Computer Science Department, University
of Michigan, Ann Arbor, MI, 48109, USA.
*
To whom correspondence should be addressed.
Read the Full Text
THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
- Spintronics: A Spin-Based Electronics Vision for the Future.
- S. A. Wolf, D. D. Awschalom, R. A. Buhrman, J. M. Daughton, S. von Molnar, M. L. Roukes, A. Y. Chtchelkanova, and D. M. Treger (2001)
Science
294, 1488-1495
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