Mini-Max-Optimized Semi-analytical (MiMOSA) Approximation of Convoluted Susceptibility

We present a Mini-Max-Optimized Semi-analytical Approximation (MiMOSA) method to efficiently model the convolution type of dispersion in time-domain electromagnetic and multiphysics solvers. The method is based on an efficient (only 2 or 3 poles) and accurate minimax rational approximation. We discuss a representative case for this material dispersion class - disordered materials exhibiting inhomogeneous broadening with Voight absorption profiles. Accurate experimental-based modeling of disordered materials in the time domain was unavailable, and MiMOSA approximations fill this gap.