Efficient Leapfrog 2-D SF FDTD Method for Periodic Structures

This paper presents an efficient Leapfrog implementation of the 2-D split-field (SF) FDTD method for solving problems of the oblique incident plane wave on periodic structures. By adopting the modified (SF) method, Peaceman-Rachford scheme, one-step Leapfrog scheme and Sherman-Morrison formula, the proposed (SF) method is implemented in the much simpler scheme than traditional (SF) method. Furthermore, the Courant-Friedrich-Levy (CFL) stability condition of the proposed method is weaker. The accuracy and efficiency of this method are verified by numerical results.