Fu, K. M. C., Clark, S. M., Santori, C., Stanley, C. R., Holland, M. C. and Yamamoto, Y. (2008) Ultrafast control of donor-bound electron spins with single detuned optical pulses. Nature Physics, 4(10), pp. 780-784. (doi: 10.1038/nphys1052)
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Abstract
The ability to control spins in semiconductors is important in a variety of fields, including spintronics and quantum information processing. Due to the potentially fast dephasing times of spins in the solid state(1-3), spin control operating on the picosecond timescale, or faster, may be necessary. Such speeds-which are not possible to reach with standard electron spin resonance techniques based on microwave sources-can be attained with broadband optical pulses. One promising ultrafast technique uses single broadband pulses detuned from resonance in a three-level Lambda system(4). This technique is robust against optical-pulse imperfections and does not require a fixed optical reference phase. Here we demonstrate, theoretically and experimentally, the principle of coherent manipulation of spins using this approach. Spin rotations with areas exceeding pi/4 for a single pulse and pi/2 for two pulses are achieved for donor-bound electrons. This technique might find applications from basic solid-state electron spin resonance spectroscopy to arbitrary single-qubit rotations(4,5) and bang-bang control(6) for quantum computation
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Stanley, Professor Colin and Holland, Dr Martin |
Authors: | Fu, K. M. C., Clark, S. M., Santori, C., Stanley, C. R., Holland, M. C., and Yamamoto, Y. |
College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
Journal Name: | Nature Physics |
ISSN: | 1745-2473 |
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