Application of DP-FETI domain decomposition method for the negative index of refraction materials

In this paper, NIM are modeled by a fast nonconforming dual primal-finite element tearing interconnecting (DP-FETI) domain decomposition method (DDM). We apply the DP-FETI-DDM method to model both positive and negative index materials, refer to as PIM and NIM. Since NIM are generally periodic in nature, the proposed method is capable of taking advantage of such periodicity and only requires small amount of memory.