Related Experiment Video
Updated: Jul 23, 2025
11:08
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
19.0K
Wafer-scale inverted gallium phosphide-on-insulator rib waveguides for nonlinear photonics
Optics Letters
|July 14, 2023
Summary
We developed a scalable, low-cost gallium phosphide-on-insulator (GaP-OI) photonic platform. This platform shows promise for nonlinear optics applications due to its efficient supercontinuum generation.
Area of Science:
- Photonics
- Materials Science
- Nonlinear Optics
Background:
- Gallium phosphide (GaP) is a promising material for photonic integrated circuits.
- Existing fabrication methods for GaP-based photonics can be complex and costly.
- Scalability and cost-effectiveness are crucial for widespread adoption of GaP photonics.
Purpose of the Study:
- To develop a scalable and low-cost fabrication process for gallium phosphide-on-insulator (GaP-OI) photonic platforms.
- To demonstrate the potential of the fabricated GaP-OI platform for nonlinear optical applications.
Main Methods:
- An intermediate-layer bonding process was employed for GaP-OI fabrication.
- An "etch-n-transfer" sequence was utilized to create inverted rib waveguide structures.
- Waveguide propagation loss and nonlinear optical properties were characterized.
Main Results:
- The fabricated GaP-OI platform features shallow-etched 1.8 µm-wide waveguides.
- A propagation loss of 23.5 dB/cm at 1550 nm wavelength was measured.
- Supercontinuum generation was observed, and the nonlinear refractive index (n2) of GaP was determined to be 1.9 × 10⁻¹⁷ m²/W.
Conclusions:
- The developed intermediate-layer bonding and "etch-n-transfer" process enables scalable and cost-effective GaP-OI photonic platform fabrication.
- The demonstrated nonlinear properties, including supercontinuum generation, highlight the potential of GaP-OI for third-order nonlinear applications.
