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Related Experiment Video

Updated: Nov 9, 2025

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
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Squeezed light from a nanophotonic molecule.

Y Zhang1, M Menotti1, K Tan1

  • 1Xanadu, Toronto, ON, Canada.

Nature Communications
|April 15, 2021
PubMed
Summary
This summary is machine-generated.

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Researchers engineered a photonic molecule on a chip to generate clean squeezed light for quantum information processing. This novel approach suppresses noise, enabling efficient production of high-quality non-classical light.

Area of Science:

  • Integrated photonics
  • Quantum optics
  • Nonlinear optics

Background:

  • Scalable sources of non-classical light are crucial for quantum information processing.
  • Existing methods using single microring resonators suffer from nonlinear noise contamination.
  • Delicate engineering of integrated nonlinear structures is needed for improved light sources.

Purpose of the Study:

  • To demonstrate a photonic molecule for generating strongly squeezed light.
  • To suppress noise from parasitic nonlinear processes in integrated photonic devices.
  • To enable efficient generation of degenerate squeezed light using microring resonators.

Main Methods:

  • Fabrication of a photonic molecule comprising two coupled microring resonators on a nanophotonic chip.

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  • Tuning the photonic molecule to selectively hybridize modes involved in parasitic processes.
  • Utilizing the device to generate broadband degenerate squeezed light.

    • Main Results:

    • Successful suppression of parasitic parametric fluorescence.
    • Demonstration of efficient generation of degenerate squeezed light.
    • Achieved 8(1) dB of broadband degenerate squeezed light on-chip, with 1.65(1) dB directly measured.

    Conclusions:

    • The photonic molecule approach effectively suppresses nonlinear noise.
    • This strategy overcomes limitations of single-resonator structures for squeezed light generation.
    • The demonstrated device is a promising step towards scalable quantum information processing.