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Fast control of nuclear spin polarization in an optically pumped single quantum dot

Nature Materials volume 10, pages 844848 (2011) | Download Citation

Abstract

Highly polarized nuclear spins within a semiconductor quantum dot induce effective magnetic (Overhauser) fields of up to several Tesla acting on the electron spin1,2,3,4,5,6,7,8,9,10,11,12, or up to a few hundred mT for the hole spin13,14. Recently this has been recognized as a resource for intrinsic control of quantum-dot-based spin quantum bits. However, only static long-lived Overhauser fields could be used10,11. Here we demonstrate fast redirection on the microsecond timescale of Overhauser fields on the order of 0.5 T experienced by a single electron spin in an optically pumped GaAs quantum dot. This has been achieved using coherent control of an ensemble of 105 optically polarized nuclear spins by sequences of short radiofrequency pulses. These results open the way to a new class of experiments using radiofrequency techniques to achieve highly correlated nuclear spins in quantum dots, such as adiabatic demagnetization in the rotating frame15 leading to sub-μK nuclear spin temperatures, rapid adiabatic passage15, and spin squeezing16.

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References

  1. 1.

    et al. Dynamic nuclear polarization of a single charge-tunable InAs/GaAs quantum dot. Phys. Rev. B 74, 081306(R) (2006).

  2. 2.

    et al. Nuclear spin switch in semiconductor quantum dots. Phys. Rev. Lett. 98, 026806 (2007).

  3. 3.

    et al. Dynamics of optically induced nuclear spin polarization in individual InP/GaInP quantum dots. Phys. Rev. B 81, 245308 (2010).

  4. 4.

    et al. Optically controlled locking of the nuclear field via coherent dark-state spectroscopy. Nature 459, 1105–1109 (2009).

  5. 5.

    et al. Confluence of resonant laser excitation and bidirectional quantum-dot nuclear-spin polarization. Nature Phys. 5, 758–763 (2009).

  6. 6.

    et al. Suppression of nuclear spin diffusion at a GaAs/AlxGa1−xAs interface measured with a single quantum-dot nanoprobe. Phys. Rev. B 79, 081303(R) (2009).

  7. 7.

    et al. Nuclear spectroscopy in single quantum dots: Nanoscopic Raman scattering and nuclear magnetic resonance. Science 277, 85–88 (1997).

  8. 8.

    et al. Optically tunable nuclear magnetic resonance in a single quantum dot. Phys. Rev. B 82, 161309(R) (2010).

  9. 9.

    , , & Direct measurement of the hole-nuclear spin interaction in single InP/GaInP quantum dots using photoluminescence spectroscopy. Phys. Rev. Lett. 106, 027402 (2011).

  10. 10.

    , , , & Universal quantum control of two-electron spin quantum bits using dynamic nuclear polarization. Nature Phys. 5, 903–908 (2009).

  11. 11.

    et al. Controlling the interaction of electron and nuclear spins in a tunnel-coupled quantum dot. Phys. Rev. Lett. 106, 046802 (2011).

  12. 12.

    , & in Spin Physics in Semiconductors (ed. Dyakonov, M. I.) (Springer, 2008).

  13. 13.

    et al. Pumping of nuclear spins by optical excitation of spin-forbidden transitions in a quantum dot. Phys. Rev. Lett. 104, 066804 (2010).

  14. 14.

    , & Measurement of a heavy-hole hyperfine interaction in InGaAs quantum dots using resonance fluorescence. Phys. Rev. Lett. 105, 257402 (2010).

  15. 15.

    Principles of Magnetic Resonance (Springer, 1990).

  16. 16.

    , , & Generating entanglement and squeezed states of nuclear spins in quantum dots. Preprint at (2010).

  17. 17.

    , & Nucleus-mediated spin-flip transitions in GaAs quantum dots. Phys. Rev. B 64, 195306 (2001).

  18. 18.

    , & Electron spin decoherence in quantum dots due to interaction with nuclei. Phys. Rev. Lett. 88, 186802 (2002).

  19. 19.

    et al. Coherent manipulation of coupled electron spins in semiconductor quantum dots. Science 309, 2180–2184 (2005).

  20. 20.

    et al. Control and detection of singlet–triplet mixing in a random nuclear field. Science 309, 1346 (2005).

  21. 21.

    et al. Locking electron spins into magnetic resonance by electron–nuclear feedback. Nature Phys. 5, 764–768 (2009).

  22. 22.

    et al. Dephasing time of GaAs electron-spin qubits coupled to a nuclear bath exceeding 200 μs. Nature Phys. 7, 109 (2011).

  23. 23.

    , , , & Controlled multiple quantum coherences of nuclear spins in a nanometre-scale device. Nature 434, 1001 (2005).

  24. 24.

    , , & Coherent control of nuclear-spin system in a quantum-Hall device. Appl. Phys. Lett. 82, 409 (2003).

  25. 25.

    et al. Optical pump–probe measurements of local nuclear spin coherence in semiconductor quantum wells. Phys. Rev. Lett. 96, 067602 (2006).

  26. 26.

    et al. Exciton-photon strong-coupling regime for a single quantum dot embedded in a microcavity. Phys. Rev. Lett. 95, 067401 (2005).

  27. 27.

    A molecular beam resonance method with separated oscillating fields. Phys. Rev. 78, 695–699 (1950).

  28. 28.

    Principles of Nuclear Magnetism (Oxford Univ. Press, 1961).

  29. 29.

    Transient nutations in nuclear magnetic resonance. Phys. Rev. 76, 1059–1068 (1949).

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Acknowledgements

We thank L. M. K. Vandersypen, V. I. Fal’ko, E. A. Chekhovich and A. D. Andreev for discussions, and D. Martrou for help with the sample growth. This work has been supported by the EPSRC Programme Grant EP/G601642/1, ITN Spin-Optronics and the Royal Society.

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Affiliations

  1. Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, UK

    • M. N. Makhonin
    • , A. J. Ramsay
    • , M. S. Skolnick
    •  & A. I. Tartakovskii
  2. A. F. Ioffe Physico-Technical Institute, 194021, St Petersburg, Russia

    • K. V. Kavokin
  3. Laboratoire de Photonique et de Nanostructures, Route de Nozay, 91460 Marcoussis, France

    • P. Senellart
    •  & A. Lemaître

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Contributions

A.L. and P.S. developed and grew the sample. M.N.M. and A.I.T. conceived the experiments. M.N.M. designed and carried out the experiments. M.N.M, K.V.K. and A.I.T. analysed the data. A.I.T. and M.N.M. wrote the manuscript with input from all authors.

Competing interests

The authors declare no competing financial interests.

Corresponding authors

Correspondence to M. N. Makhonin or A. I. Tartakovskii.

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DOI

https://doi.org/10.1038/nmat3102

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