研究目的
Investigating the use of metasurfaces to artificially monitor Quasi-Phase Matching in nonlinear optics, specifically for second harmonic generation in Gallium Nitride waveguides.
研究成果
Metasurfaces offer a viable alternative to traditional periodical poling for Quasi-Phase Matching in nonlinear optics, with potential applications in highly nonlinear systems and arbitrary phase matching conditions. Future work includes integrating quantum wells to enhance nonlinear efficiency.
研究不足
The fabrication process and material constraints may limit the applicability to other nonlinear materials. The study also notes the need for optimization to minimize propagation losses.
1：Experimental Design and Method Selection:
The study employs metasurfaces to artificially monitor Quasi-Phase Matching in nonlinear optics. Theoretical models include the Second Harmonic Generation wave equation and B-spline modal method for effective index calculation.
2：Sample Selection and Data Sources:
A Gallium Nitride waveguide on a sapphire substrate is used, with sub-wavelength gratings of holes etched into it.
3：List of Experimental Equipment and Materials:
Equipment includes a Reactive Ion Etching - Electron Cyclotron Resonance machine for dry etching, and a commercial-grade simulator based on the finite-difference time-domain method.
4：Experimental Procedures and Operational Workflow:
The process involves e-beam lithography for patterning, dry etching to create holes, and characterization using coupler gratings for light coupling into the waveguide.
5：Data Analysis Methods:
The study analyzes transmission and phase mismatch using B-spline modal method and finite-difference time-domain simulations.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
