Single electron-spin memory with a semiconductor quantum dot

Young, Robert J. and Dewhurst, Samuel J. and Stevenson, R. Mark and Atkinson, Paola and Bennett, Anthony J. and Ward, Martin B. and Cooper, Ken and Ritchie, David A. and Shields, Andrew J. (2007) Single electron-spin memory with a semiconductor quantum dot. New Journal of Physics, 9. -. ISSN 1367-2630

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We show storage of the circular polarization of an optical field, transferring it to the spin-state of an individual electron confined in a single semiconductor quantum dot. The state is subsequently read out through the electronically-triggered emission of a single photon. The emitted photon shares the same polarization as the initial pulse but has a different energy, making the transfer of quantum information between different physical systems possible. With an applied magnetic field of 2 T, spin memory is preserved for at least 1000 times more than the exciton's radiative lifetime.

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Journal Article
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New Journal of Physics
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07 Jun 2012 10:55
Last Modified:
21 Nov 2022 22:22