A Frequency-Dependent Weakly Conditionally Stable Finite-Difference Time-Domain Method for Dispersive Materials

摘要

A frequency-dependent weakly conditionally stable finite-difference time-domain (WCS-FDTD) method for dispersive materials is presented. This method has higher computation efficiency than conventional FDTD method because the time step in this method is only determined by one space discretization. The accuracy of this method is demonstrated by computing the incident field at a planar air-water interface over a wide frequency band including the effects of the frequency-dependent permittivity of water.