Convergence of the discrete dipole approximation. II. An extrapolation technique to increase the accuracy

Details Convergence of the discrete dipole approximation. II. An extrapolation technique to increase the accuracy Convergence of the discrete dipole approximation. II. An extrapolation technique to increase the accuracy

2007-03-31

arxiv.org/abs/0704.0035v1

J.Opt.Soc.Am.A 23(10): 2592-2601 (2006)

Physics

Optics

17 pages, 8 figures

Scientific paper

10.1364/JOSAA.23.002592

We propose an extrapolation technique that allows accuracy improvement of the discrete dipole approximation computations. The performance of this technique was studied empirically based on extensive simulations for 5 test cases using many different discretizations. The quality of the extrapolation improves with refining discretization reaching extraordinary performance especially for cubically shaped particles. A two order of magnitude decrease of error was demonstrated. We also propose estimates of the extrapolation error, which were proven to be reliable. Finally we propose a simple method to directly separate shape and discretization errors and illustrated this for one test case.

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