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Hyperparametric Oscillation via Bound States in the Continuum.

Fuchuan Lei1, Zhichao Ye1, Krishna Twayana1

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This summary is machine-generated.

We demonstrate on-chip hyperparametric oscillation using bound states in the continuum (BICs). This method achieves unprecedented conversion efficiency and signal power for coherent light generation in microresonators.

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Area of Science:

  • Photonics
  • Quantum Optics
  • Nonlinear Optics

Background:

  • Optical hyperparametric oscillation generates coherent light and quantum states via third-order nonlinearity.
  • Microresonators enable low-threshold oscillation but suffer from low efficiency and power due to mode competition and Q-ratios.
  • Existing methods face limitations in pump-to-signal conversion efficiency and absolute signal power.

Purpose of the Study:

  • To overcome limitations in microresonator-based hyperparametric oscillation.
  • To achieve high-efficiency and high-power on-chip coherent light generation.
  • To explore the application of Friedrich-Wintgen bound states in the continuum (BICs) in nonlinear photonics.

Main Methods:

  • Utilized Friedrich-Wintgen bound states in the continuum (BICs) within an integrated microresonator-waveguide system.
  • Engineered dispersion in high-Q microresonators to decrease oscillation power thresholds.
  • Leveraged the unique properties of BICs to enhance nonlinear processes.

Main Results:

  • Achieved on-chip coherent hyperparametric oscillation in BICs.
  • Demonstrated unprecedented pump-to-signal conversion efficiency.
  • Generated high absolute signal power for continuous-wave electromagnetic radiation.
  • Overcame parasitic mode competition issues inherent in traditional microresonators.

Conclusions:

  • Friedrich-Wintgen BICs provide a pathway to high-power and efficient on-chip coherent light generation.
  • This work advances the understanding and application of microresonator-waveguide systems in photonics.
  • The developed method offers a novel approach for generating continuous-wave electromagnetic radiation in Kerr nonlinear media.