MATLAB Implementation of FDTD Method for Photonic Crystal Waveguides

This documentation presents an FDTD (Finite-Difference Time-Domain) computational tool implemented in MATLAB. The program specializes in calculating electromagnetic properties of photonic crystal waveguides with various configurations, including straight waveguides and folded waveguide structures. The implementation employs Yee's algorithm for spatial discretization and time-stepping solutions of Maxwell's equations, providing accurate modeling of light propagation through periodic dielectric structures. Key functions include boundary condition handling (PML absorption layers), source excitation mechanisms, and field monitoring components for transmission analysis. While utilizing this program requires fundamental knowledge of computational electromagnetics and photonic crystal physics, mastering its application offers researchers and engineers a powerful tool for designing and optimizing photonic waveguide devices, significantly accelerating research and development efficiency in photonics engineering.