Numerical integration schemes used on the differential theory for anisotropic gratings.
Several formulations of the differential theory for anisotropic gratings are investigated numerically. Conventional formulations and recent formulations based on Li's Fourier factorization rules are applied to a sinusoidal-profiled grating made of an anisotropic and conducting material. For both types of formulation, the numerical results of the differential and the rigorous coupled-wave methods are presented, and only the differential method based on Li's Fourier factorization rules provides a reliable convergence. Moreover, several numerical integration schemes used on the differential method are examined, and the advantage of the implicit integration schemes is shown.
Watanabe
Koki
K
Department of Information and Communication Engineering, Faculty of Information Engineering, Fukuoka Institute of Technology, Wajirohigashi, Japan. koki@fit.ac.jp