Multi-layer Discrete Dipole Approximation (MDDA) simulation tool

A method for simulating the scattering of particles embedded in planar multi-layered structures, is presented. The discrete-dipole approximation is extended by including the multi-layer dyadic Green’s function into the algorithm. The dyadic Green’s function is computed in the spectral domain and is then transformed back to the spatial domain using Sommerfeld integrals, special care is taken to make this transform fast and accurate.