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Optical charge injection and coherent control of a quantum-dot spin-qubit emitting at telecom wavelengths

Author

Listed:
  • Łukasz Dusanowski

    (University of Würzburg
    Princeton University)

  • Cornelius Nawrath

    (University of Stuttgart)

  • Simone L. Portalupi

    (University of Stuttgart)

  • Michael Jetter

    (University of Stuttgart)

  • Tobias Huber

    (University of Würzburg)

  • Sebastian Klembt

    (University of Würzburg)

  • Peter Michler

    (University of Stuttgart)

  • Sven Höfling

    (University of Würzburg
    University of St Andrews)

Abstract

Solid-state quantum emitters with manipulable spin-qubits are promising platforms for quantum communication applications. Although such light-matter interfaces could be realized in many systems only a few allow for light emission in the telecom bands necessary for long-distance quantum networks. Here, we propose and implement an optically active solid-state spin-qubit based on a hole confined in a single InAs/GaAs quantum dot grown on an InGaAs metamorphic buffer layer emitting photons in the C-band. We lift the hole spin-degeneracy using an external magnetic field and demonstrate hole injection, initialization, read-out and complete coherent control using picosecond optical pulses. These results showcase a solid-state spin-qubit platform compatible with preexisting optical fiber networks.

Suggested Citation

  • Łukasz Dusanowski & Cornelius Nawrath & Simone L. Portalupi & Michael Jetter & Tobias Huber & Sebastian Klembt & Peter Michler & Sven Höfling, 2022. "Optical charge injection and coherent control of a quantum-dot spin-qubit emitting at telecom wavelengths," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-28328-2
    DOI: 10.1038/s41467-022-28328-2
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    1. L. Wells & T. Müller & R. M. Stevenson & J. Skiba-Szymanska & D. A. Ritchie & A. J. Shields, 2023. "Coherent light scattering from a telecom C-band quantum dot," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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