A hybrid implicit-explicit FDTD method with an intermediate field

Abstract

For analyzing wave propagation problems involving fine geometries, a novel hybrid implicit-explicit finite-difference time-domain (HIE-FDTD) scheme is presented. Both the stability condition and numerical dispersion are theoretically analyzed. Numerical simulation indicates that the computational cost of this method to produce results with nearly identical accuracy to the existing HIE-FDTD method has been considerably saved.