The numerically exact superposition T-matrix method is used to compute the scattering cross sections and the Stokes scattering matrix for polydisperse spherical particles covered with a large number of much smaller grains. We show that the optical effect of the presence of microscopic dust on the surfaces of wavelength-sized, weakly absorbing particles is much less significant than that of a major overall asphericity of the particle shape.
© 2011 Optical Society of America
Original Manuscript: November 17, 2010
Revised Manuscript: December 10, 2010
Manuscript Accepted: December 13, 2010
Published: January 25, 2011
Vol. 6, Iss. 3 Virtual Journal for Biomedical Optics
Michael I. Mishchenko, Janna M. Dlugach, and Daniel W. Mackowski, "Light scattering by wavelength-sized particles “dusted” with subwavelength-sized grains," Opt. Lett. 36, 337-339 (2011)