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Related Experiment Video

Updated: Nov 11, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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Photonic Crystal Optical Parametric Oscillator.

Gabriel Marty1,2, Sylvain Combrié1, Fabrice Raineri2,3

  • 1Thales Research and Technology, Campus Polytechnique, 1 avenue Augustin Fresnel, 91767 Palaiseau, France.

Nature Photonics
|March 26, 2021
PubMed
Summary
This summary is machine-generated.

We developed a novel semiconductor Photonic Crystal Cavity for Optical Parametric Oscillators. This technology enables efficient generation of quantum light sources for optical circuits.

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Area of Science:

  • Optics
  • Quantum Optics
  • Semiconductor Physics

Background:

  • Optical Parametric Oscillators (OPOs) are crucial for generating specific light frequencies.
  • Existing OPO technologies face limitations in efficiency and integration.
  • Photonic Crystal Cavities offer unique light confinement properties.

Purpose of the Study:

  • To introduce a new class of OPOs utilizing semiconductor Photonic Crystal Cavities.
  • To demonstrate operation at telecom wavelengths with high Q-factor modes.
  • To enable efficient generation of quantum light for optical circuits.

Main Methods:

  • Fabrication of a 20-microm-long semiconductor Photonic Crystal Cavity.
  • Utilizing Bragg scattering for optical confinement.
  • Thermally tuning high Q-factor modes into a triply resonant configuration.

Main Results:

  • Achieved parametric oscillation in a few, equispaced frequency modes.
  • Demonstrated strong suppression of unwanted parametric interactions.
  • Estimated a low pump power threshold of 50-70 microwatts.
  • The source operates as an ideal degenerate Optical Parametric Oscillator.

Conclusions:

  • This new OPO class, based on semiconductor Photonic Crystal Cavities, is highly efficient.
  • It addresses the need for integrated nonlinear sources in quantum optical circuits.
  • Paves the way for dense integration of squeezed light and entangled photon pair sources.