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Bright single-photon sources in bottom-up tailored nanowires

Author

Listed:
  • Michael E. Reimer

    (Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands.)

  • Gabriele Bulgarini

    (Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands.)

  • Nika Akopian

    (Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands.)

  • Moïra Hocevar

    (Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands.)

  • Maaike Bouwes Bavinck

    (Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands.)

  • Marcel A. Verheijen

    (Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.)

  • Erik P.A.M. Bakkers

    (Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands.
    Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.)

  • Leo P. Kouwenhoven

    (Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands.)

  • Val Zwiller

    (Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands.)

Abstract

The ability to achieve near-unity light-extraction efficiency is necessary for a truly deterministic single-photon source. The most promising method to reach such high efficiencies is based on embedding single-photon emitters in tapered photonic waveguides defined by top-down etching techniques. However, light-extraction efficiencies in current top-down approaches are limited by fabrication imperfections and etching-induced defects. The efficiency is further tempered by randomly positioned off-axis quantum emitters. Here we present perfectly positioned single quantum dots on the axis of a tailored nanowire waveguide using bottom-up growth. In comparison to quantum dots in nanowires without waveguides, we demonstrate a 24-fold enhancement in the single-photon flux, corresponding to a light-extraction efficiency of 42%. Such high efficiencies in one-dimensional nanowires are promising to transfer quantum information over large distances between remote stationary qubits using flying qubits within the same nanowire p–n junction.

Suggested Citation

  • Michael E. Reimer & Gabriele Bulgarini & Nika Akopian & Moïra Hocevar & Maaike Bouwes Bavinck & Marcel A. Verheijen & Erik P.A.M. Bakkers & Leo P. Kouwenhoven & Val Zwiller, 2012. "Bright single-photon sources in bottom-up tailored nanowires," Nature Communications, Nature, vol. 3(1), pages 1-6, January.
    • Handle: RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms1746
    DOI: 10.1038/ncomms1746
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