Exciton-spin memory with a semiconductor quantum dot molecule

A. Boyer de la Giroday; N. Skold; R. M. Stevenson; I. Farrer; D. A. Ritchie; A. J. Shields

doi:10.1103/PhysRevLett.106.216802

Exciton-spin memory with a semiconductor quantum dot molecule

Quantum Physics 2015-05-28 v1 Mesoscale and Nanoscale Physics

Authors: A. Boyer de la Giroday , N. Skold , R. M. Stevenson , I. Farrer , D. A. Ritchie , A. J. Shields

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Abstract

We report on a single photon and spin storage device based on a semiconductor quantum dot molecule. Optically excited single electron-hole pairs are trapped within the molecule and their recombination rate is electrically controlled over three orders of magnitude. Single photons are stored up to 1 microsecond and read out on a sub-nanosecond timescale. Using resonant excitation, the circular polarisation of individual photons is transferred into the spin state of electron-hole pairs with a fidelity above 80%, which does not degrade for storage times up to the 12.5ns repetition period of the experiment.

Keywords

quantum dot excitons quantum memory silicon quantum computing

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@article{arxiv.1105.3737,
  title  = {Exciton-spin memory with a semiconductor quantum dot molecule},
  author = {A. Boyer de la Giroday and N. Skold and R. M. Stevenson and I. Farrer and D. A. Ritchie and A. J. Shields},
  journal= {arXiv preprint arXiv:1105.3737},
  year   = {2015}
}

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4 pages, 4 figures

Exciton-spin memory with a semiconductor quantum dot molecule

Abstract

Keywords

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