A study of light scattering by wavelength-sized particles covered by much smaller grains using the superposition T-matrix method

J. M. Dlugach, M. I. Mishchenko, D. W. Mackowski, I. A. Zinchenko

Abstract


By using the results of a direct, numerically exact solution of the macroscopic Maxwell equations we analyze the behavior of light scattering characteristics for polydisperse spherical particles covered with a large number of smaller grains. We show that the effect of the presence of microscopic dust on the surfaces of wavelength-sized particles depends on the particle absorption and the relative size of irregularities. In our computations, a new parallel superposion T-matrix code developed for use on parallel computer clusters is applied.

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DOI: http://dx.doi.org/10.1478/C1V89S1P028