Perfectly matched layer for hybrid implicit and explicit-FDTD method

This paper develops a perfectly matched layer (PML) for the hybrid implicit explicit finite-difference time-domain (HIE-FDTD) method. It is demonstrated that the inclusion of the PML is a simple extension of the original HIE-FDTD method. It doesn't affect the weakly condition stability and computational accuracy. Simulation results show that when the time step size satisfies with the time stability condition, the reflection error of the HIE-FDTD method is below -90dB, which demonstrates good absorbing performance of the PML method.