Abstract
The ability to model the backward and forward scattering by large inhomogeneous samples is of major importance especially for computational imaging applications. Unfortunately, when the sample dimensions exceed hundreds of wavelengths, a rigorous solving of the Maxwell Equations becomes difficult. In this work, we compare the scattered field estimated by a rigorous Maxwell equation solver, based on the discrete dipole approximation, with that given by several approached methods, Rytov, Born and a revisited Beam Propagation Method. We show on many examples, that BPM outperforms all the other techniques and accurately handles field distortion and moderate multiple scattering.
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