Increasing the performance of the coupled-dipole approximation: A spectral approach
We show that it is possible to increase the performance of the coupled-dipole approximation (CDA) for scattering by using concepts from the sampling theory. In standard CDA, the source in each discretized cell is represented by a point dipole and the corresponding scattered field given by Green's tensor. In the present approach, the source has a certain spatial extension, and the corresponding Green's tensor must be redefined. We derive these so-called filtered Green's tensors for one-dimensional (1-D), two-dimensional (2-D), and three-dimensional (3-D) systems, which forms the basis of our new scheme: the filtered coupled-dipole technique (FCD).
Keywords: computation theory ; convergence of numerical methods ; diffraction ; electromagnetic scattering ; filtering ; numerical analysis ; propagation ; sampling methods ; signal processing ; Light-Scattering ; Particles ; Absorption ; Algorithm ; Grains
Record created on 2011-04-11, modified on 2016-08-09