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Low-noise GaAs quantum dots for quantum photonics

Author

Listed:
  • Liang Zhai

    (University of Basel)

  • Matthias C. Löbl

    (University of Basel)

  • Giang N. Nguyen

    (University of Basel
    Ruhr-Universität Bochum)

  • Julian Ritzmann

    (Ruhr-Universität Bochum)

  • Alisa Javadi

    (University of Basel)

  • Clemens Spinnler

    (University of Basel)

  • Andreas D. Wieck

    (Ruhr-Universität Bochum)

  • Arne Ludwig

    (Ruhr-Universität Bochum)

  • Richard J. Warburton

    (University of Basel)

Abstract

Quantum dots are both excellent single-photon sources and hosts for single spins. This combination enables the deterministic generation of Raman-photons—bandwidth-matched to an atomic quantum-memory—and the generation of photon cluster states, a resource in quantum communication and measurement-based quantum computing. GaAs quantum dots in AlGaAs can be matched in frequency to a rubidium-based photon memory, and have potentially improved electron spin coherence compared to the widely used InGaAs quantum dots. However, their charge stability and optical linewidths are typically much worse than for their InGaAs counterparts. Here, we embed GaAs quantum dots into an n-i-p-diode specially designed for low-temperature operation. We demonstrate ultra-low noise behaviour: charge control via Coulomb blockade, close-to lifetime-limited linewidths, and no blinking. We observe high-fidelity optical electron-spin initialisation and long electron-spin lifetimes for these quantum dots. Our work establishes a materials platform for low-noise quantum photonics close to the red part of the spectrum.

Suggested Citation

  • Liang Zhai & Matthias C. Löbl & Giang N. Nguyen & Julian Ritzmann & Alisa Javadi & Clemens Spinnler & Andreas D. Wieck & Arne Ludwig & Richard J. Warburton, 2020. "Low-noise GaAs quantum dots for quantum photonics," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
  • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-18625-z
    DOI: 10.1038/s41467-020-18625-z
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    Cited by:

    1. Paweł Holewa & Daniel A. Vajner & Emilia Zięba-Ostój & Maja Wasiluk & Benedek Gaál & Aurimas Sakanas & Marek Burakowski & Paweł Mrowiński & Bartosz Krajnik & Meng Xiong & Kresten Yvind & Niels Gregers, 2024. "High-throughput quantum photonic devices emitting indistinguishable photons in the telecom C-band," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    2. Dylan Renaud & Daniel Rimoli Assumpcao & Graham Joe & Amirhassan Shams-Ansari & Di Zhu & Yaowen Hu & Neil Sinclair & Marko Loncar, 2023. "Sub-1 Volt and high-bandwidth visible to near-infrared electro-optic modulators," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    3. Peter Millington-Hotze & Santanu Manna & Saimon F. Covre da Silva & Armando Rastelli & Evgeny A. Chekhovich, 2023. "Nuclear spin diffusion in the central spin system of a GaAs/AlGaAs quantum dot," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    4. Clemens Spinnler & Liang Zhai & Giang N. Nguyen & Julian Ritzmann & Andreas D. Wieck & Arne Ludwig & Alisa Javadi & Doris E. Reiter & Paweł Machnikowski & Richard J. Warburton & Matthias C. Löbl, 2021. "Optically driving the radiative Auger transition," Nature Communications, Nature, vol. 12(1), pages 1-6, December.
    5. 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.
    6. N. Bart & C. Dangel & P. Zajac & N. Spitzer & J. Ritzmann & M. Schmidt & H. G. Babin & R. Schott & S. R. Valentin & S. Scholz & Y. Wang & R. Uppu & D. Najer & M. C. Löbl & N. Tomm & A. Javadi & N. O. , 2022. "Wafer-scale epitaxial modulation of quantum dot density," Nature Communications, Nature, vol. 13(1), pages 1-7, December.

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