研究目的
Investigating the complex mode matching method for modeling and simulation of surface-emitting grating couplers to improve coupling efficiency and computational efficiency.
研究成果
The complex mode matching method is effective for modeling and simulation of surface-emitting grating couplers, offering significant computational savings with accurate results. The method's accuracy critically depends on the numerical accuracy of the complex modes. The reduced 2D model is validated against full 3D simulations, and optimization using a genetic algorithm yields consistent results with literature.
研究不足
The study is limited by the accuracy of the complex modes obtained numerically and the computational resources required for 3D simulations. The 2D model, while efficient, may not capture all aspects of 3D structures.
1：Experimental Design and Method Selection:
The study employs a complex mode matching method (CMMM) for modeling and simulation of grating couplers, comparing it with the finite-difference time-domain (FDTD) method. A reduced two-dimensional (2D) model is used for simplification.
2：Sample Selection and Data Sources:
A uniform grating coupler based on silicon-on-insulator platform is used for assessment. Parameters include grating period, duty cycle, and etching depth.
3：List of Experimental Equipment and Materials:
The study utilizes computational models and simulations without specifying physical equipment.
4：Experimental Procedures and Operational Workflow:
The CMMM and FDTD methods are applied to simulate the grating coupler's performance, focusing on upward radiation power and coupling efficiency.
5：Data Analysis Methods:
The results are analyzed for accuracy and efficiency, comparing the CMMM with FDTD simulations.
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