Transmission Characteristics Curve of 1D Photonic Crystal Waveguide with Code Implementation

The following code implements the transmission characteristics curve simulation for 1D photonic crystal waveguides, designed to study waveguide transmission performance under various conditions. The implementation defines material parameters and geometric configurations of photonic crystal waveguides, enabling numerical computation of transmission characteristic curves through systematic parameter sweeping. These curves provide insights into waveguide behavior under different frequencies, input power levels, and structural variations, facilitating waveguide design improvements and performance optimization. The code employs finite element method (FEM) with quadratic photonic crystal elements to model waveguide transmission properties. Key implemented parameters include refractive indices of waveguide materials, geometric dimensions (periodicity, layer thicknesses), and incident light frequency ranges. The simulation algorithm calculates critical performance metrics including transmission loss spectra, bandwidth characteristics, and group velocity dispersion through eigenvalue solving and transmission matrix methods. Through numerical simulations, the code generates essential parameters such as transmission loss coefficients, operational bandwidth limits, and group velocity profiles, enabling comprehensive waveguide performance evaluation. The implementation includes parameter visualization routines and data export capabilities for further analysis. This code serves as a valuable tool for investigating transmission properties of photonic crystal waveguides, providing deeper understanding of waveguide performance and supporting design optimization efforts. For technical inquiries or implementation suggestions, please contact our research team.