Multi-mode cavities for high-efficiency nonlinear wavelength conversion formed with overlap optimization

A dual frequency optical resonator configured for optical coupling to light having a first frequency ω1, the dual frequency optical resonator comprising:

• a plurality of alternating layers pairs configured in a grating configuration, each layer pair having a first layer formed of a first material and a second layer formed of a second material, the first material and second materials being different materials,
• the first layer having a first thickness and the second layer having a second thickness, the thicknesses of the first and second layer being selected to create optical resonances at the first frequency ω1 and a second frequency ω2 which is a harmonic of ω1 and the thicknesses of the first and second layer also being selected to enhance nonlinear coupling between the first frequency ω1 and a second frequency ω2.

A dual frequency optical resonator configured for optical coupling to light having a first frequency ω1, the dual frequency optical resonator comprising:

• a plurality of pixels configured in an X-Y plane, each pixel being formed of either a first material or a second material, the first material and second materials being different materials,
• the material for each pixel is selected such that the plurality of pixels create optical resonances at the first frequency ω1 and a second frequency ω2 which is a harmonic of ω1 and the material for each pixel is also selected such that the plurality of pixels enhance nonlinear coupling between the first frequency ω1 and a second frequency ω2.