Influence of the edge meshes on the accuracy of the coupled-dipole approximation.
We demonstrate that an appropriate discretization scheme can render the convergence of the coupled-dipole approximation (also known as the discrete-dipole approximation) much more regular and improve its accuracy by as much as a factor of 24. This discretization scheme is simple, can be applied to arbitrarily shaped scatterers, and does not require additional computation time.
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Laboratory for Field Theory and Microwave Electronics, Swiss Federal Institute of Technology, ETH-Zentrum, 8092 Zurich, Switzerland, USA.