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Related Experiment Video

Updated: Nov 11, 2025

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
12:19

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

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On-chip photon-pair generation in a silica microtoroidal cavity.

Yosuke Hashimoto, Akihisa Goban, Yuki Hirabayashi

    Optics Express
    |March 27, 2021
    PubMed
    Summary

    Researchers created compact on-chip photon-pair sources using silica microcavities. These sources demonstrate heralded photon antibunching, paving the way for scalable quantum technologies.

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    Area of Science:

    • Quantum optics and photonics
    • Integrated photonics
    • Nonlinear optics

    Background:

    • High Q-factor microcavities are crucial for efficient photon-pair generation.
    • Spontaneous four-wave mixing (SFWM) is a key process for creating photon pairs.
    • Integrated photonic circuits offer miniaturization and scalability for quantum applications.

    Purpose of the Study:

    • To demonstrate on-chip photon-pair generation using a silica microtoroidal cavity.
    • To characterize the generated photon pairs and identify noise sources.
    • To explore the potential of silica photonic circuits for scalable quantum technologies.

    Main Methods:

    • Fabrication of a silica microtoroidal cavity with high Q factor and small mode volume.
    • On-chip photon-pair generation via spontaneous four-wave mixing (SFWM).

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    Last Updated: Nov 11, 2025

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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    Published on: April 4, 2017

    8.6K
    Fabrication of Silica Ultra High Quality Factor Microresonators
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  • Measurement of coincidence-to-accidental ratio and heralded photon antibunching.

    • Main Results:

    • Achieved on-chip photon-pair generation with a coincidence-to-accidental ratio of 7.4 ± 0.1 at 46 µW pump power.
    • Observed heralded photon antibunching with g(2)(0) = 0.57 ± 0.03, indicating nonclassical behavior.
    • Identified spontaneous Raman scattering as the dominant noise source through comparison with a scaling model.

    Conclusions:

    • Silica microtoroidal cavities are effective platforms for integrated nonclassical photon sources.
    • The demonstrated photon-pair source shows promise for scalable quantum information processing.
    • Further optimization can mitigate noise and enhance source performance for quantum technologies.