A direct and an inverse domain decomposition method applied to Fourier modal method: simulation of large scale device response

A parallel spectral modal method is introduced for the frequency-domain Maxwell’s equations. The method is applied to compute electromagnetic field through a large- scale surface, using the Aperiodic Fourier Modal Method (AFMM). In the proposed domain decomposition methods, a large-size surface is squared onto sub-cells. The spectrum of the electromagnetic field component on each sub-cell may be simulated, locally with a coast that is not dependent on the number of the sub-cells, making it suitable for parallel computing