Bandpass HIE-PML Algorithm with Improved Absorption and Efficiency for Lorentz Medium

For bandpass open region simulation of complex medium with fine structures along a single direction, an alternative perfectly matched layer (PML) algorithm is proposed based on the hybrid implicit-explicit (HIE) procedure and complex envelope (CE) method. To simulate frequency-dependent medium, Lorentz model is one of the most important elements which can be solved by the piecewise linear recursive convolution method. The proposed scheme takes advantages of the HIE procedure, PML formulation and CE method in terms of accuracy, efficiency and accuracy. Through the calculation results, it can be demonstrated that the proposed scheme is efficient in the bandpass open region simulation of complex medium.