GaInP on oxide nonlinear photonic crystal technology

Area of Science:

• Photonics
• Materials Science
• Nonlinear Optics

Background:

• Nonlinear optical processes are crucial for optical signal processing.
• Efficient heat dissipation is a key challenge in integrated photonic devices.
• III-V materials offer excellent nonlinear properties but are difficult to integrate with silicon.

Purpose of the Study:

• To demonstrate improved heat dissipation in nonlinear III-V photonic crystal waveguides.
• To achieve efficient four-wave mixing in the continuous-wave regime using hybrid integration.
• To explore the potential of hybrid III-V/Silicon platforms for nonlinear photonics.

Main Methods:

• Fabrication of nonlinear III-V photonic crystal waveguides on a hybrid III-V/Silicon platform.
• Dispersion engineering of the waveguide to achieve a flat group index.
• Characterization of four-wave mixing conversion efficiency under continuous-wave pumping.

Main Results:

• Significantly improved heat dissipation compared to traditional III-V waveguides.
• Demonstrated efficient four-wave mixing with a conversion efficiency of -17.6 dB.
• Achieved this efficiency at a low pump power level below 100 mW.
• Utilized a dispersion-engineered waveguide with a flat group index of 28 over a 10 nm bandwidth.

Conclusions:

• Hybrid III-V/Silicon integration is a viable platform for high-performance nonlinear photonic devices.
• The improved thermal management enables efficient nonlinear optical processes in the continuous-wave regime.
• This approach paves the way for compact and power-efficient integrated photonic circuits.