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Highly indistinguishable photons from deterministic quantum-dot microlenses utilizing three-dimensional in situ electron-beam lithography

Author

Listed:
  • M. Gschrey

    (Institut für Festkörperphysik, Technische Universität Berlin)

  • A. Thoma

    (Institut für Festkörperphysik, Technische Universität Berlin)

  • P. Schnauber

    (Institut für Festkörperphysik, Technische Universität Berlin)

  • M. Seifried

    (Institut für Festkörperphysik, Technische Universität Berlin)

  • R. Schmidt

    (Institut für Festkörperphysik, Technische Universität Berlin)

  • B. Wohlfeil

    (Zuse-Institut Berlin (ZIB))

  • L. Krüger

    (Institut für Festkörperphysik, Technische Universität Berlin)

  • J. -H. Schulze

    (Institut für Festkörperphysik, Technische Universität Berlin)

  • T. Heindel

    (Institut für Festkörperphysik, Technische Universität Berlin)

  • S. Burger

    (Zuse-Institut Berlin (ZIB))

  • F. Schmidt

    (Zuse-Institut Berlin (ZIB))

  • A. Strittmatter

    (Institut für Festkörperphysik, Technische Universität Berlin)

  • S. Rodt

    (Institut für Festkörperphysik, Technische Universität Berlin)

  • S. Reitzenstein

    (Institut für Festkörperphysik, Technische Universität Berlin)

Abstract

The success of advanced quantum communication relies crucially on non-classical light sources emitting single indistinguishable photons at high flux rates and purity. We report on deterministically fabricated microlenses with single quantum dots inside which fulfil these requirements in a flexible and robust quantum device approach. In our concept we combine cathodoluminescence spectroscopy with advanced in situ three-dimensional electron-beam lithography at cryogenic temperatures to pattern monolithic microlenses precisely aligned to pre-selected single quantum dots above a distributed Bragg reflector. We demonstrate that the resulting deterministic quantum-dot microlenses enhance the photon-extraction efficiency to (23±3)%. Furthermore we prove that such microlenses assure close to pure emission of triggered single photons with a high degree of photon indistinguishability up to (80±7)% at saturation. As a unique feature, both single-photon purity and photon indistinguishability are preserved at high excitation power and pulsed excitation, even above saturation of the quantum emitter.

Suggested Citation

  • M. Gschrey & A. Thoma & P. Schnauber & M. Seifried & R. Schmidt & B. Wohlfeil & L. Krüger & J. -H. Schulze & T. Heindel & S. Burger & F. Schmidt & A. Strittmatter & S. Rodt & S. Reitzenstein, 2015. "Highly indistinguishable photons from deterministic quantum-dot microlenses utilizing three-dimensional in situ electron-beam lithography," Nature Communications, Nature, vol. 6(1), pages 1-8, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8662
    DOI: 10.1038/ncomms8662
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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.

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