Variational volume integral equation method for electromagnetic scattering by irregular grains.

Details Variational volume integral equation method for electromagnetic scattering by irregular grains. Variational volume integral equation method for electromagnetic scattering by irregular grains.

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jqsrt..55..637p&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 55, issue 5, pp. 637-647

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14

Scattering: Radiative Transfer, Scattering: Numerical Methods

Scientific paper

An improved volume integral equation method for computing electromagnetic scattering by small particles is introduced. The features include: use of a variational technique (least squaring) instead of a collocation (point-matching) or Galerkin-method; use of vector spherical waves instead of pulse or linear ones; analytical second order treatment of the singularity and its immediate surroundings; and precise and effective quadratures. Comparisons to Lorenz-Mie theory, T-matrix method, DDA-code and experimental results are made. The new code is found to be significantly more accurate than other commonly used volume integral and DDA codes and does not require particle homogeneity and/or symmetry as some T-matrix codes do.

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