A Split-Step FDTD Scheme with Weakly Conditional Stability

Finite-difference time-domain （FDTD） has been developed greatly in recent decades. However, for the conventional explicit FDTD method, the computational efficiency is restricted by the Courant-Friedrieh-Levy （CFL） stability condition. Though, the accuracy of the WCS is not good as FDTD. In recent years, a weakly conditionally stable （WCS） FDTD is adapted for FDTD. In this paper, a novel split-step finite-difference time-domain （NSS-FDTD） method for solving three-dimensional Maxwell＇s equations is presented, which is also proven to be weakly conditionally stable （WCS）. Com- pared with the ADI-FDTD method, the proposed method has high calculating speed. The efficiency and accuracy of the pro- posed method are validated by the numerical simulation.