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Area of Science:

  • Photonics
  • Nonlinear Optics
  • Materials Science

Background:

  • Inverse design has transformed photonics by automating the creation of complex structures.
  • Its application in nonlinear photonics remains limited, presenting a challenge for developing advanced optical functionalities.

Purpose of the Study:

  • To demonstrate quantum and classical nonlinear light generation using inverse design in silicon carbide nanophotonic cavities.
  • To achieve ultra-low reflector losses and target anomalous dispersion for optical parametric oscillation.
  • To realize second- and third-order nonlinear light generation by controlling dispersion for phase-matching conditions.

Main Methods:

  • Utilized inverse design to create silicon carbide nanophotonic Fabry-Pérot cavities.
  • Engineered anomalous dispersion to meet specific phase-matching conditions for nonlinear processes.
  • Fabricated and characterized devices for nonlinear light generation, including second- and third-order effects.

Main Results:

  • Achieved ultra-low reflector losses in the inverse-designed cavities.
  • Successfully demonstrated optical parametric oscillation by targeting anomalous dispersion.
  • Realized second- and third-order nonlinear light generation, extending stimulated parametric processes into the visible spectrum.

Conclusions:

  • Inverse design is a powerful tool for optimizing nonlinear optical devices.
  • Silicon carbide is a highly effective material for nonlinear photonics applications.
  • This work establishes computational optimization as a viable approach for nonlinear light generation.