Optimization of Photonic BandGap Structure Based on Genetic Algorithm and AH FDTD Method

In this paper, the Associated Hermite finite-difference time-domain (AH FDTD) method and Genetic algorithm (GA) are combined to optimize photonic bandgap structure by selecting the proper positions and types of material for four infinitely long dielectric rods to find the desire transmission coefficient with photonic bandgap. Compared with the traditional FDTD method, the AH FDTD method could improve the computational efficiency and speed up the optimization efficiency of the GA. It shows that when the total number of iterations is 2500 for a whole calculation, it will take 21 days for the conventional FDTD method, while 20 hours for the proposed method to get the final optimization results.