Abstract

We present a method to study the scattering by heterogeneous media based on the two-dimensional (2D), finite-difference-time-domain method and a Monte Carlo algorithm. The inhomogeneities may reach wavelength size and their optical constants are in the visible and infrared domain. The algorithm is used to determine an effective propagation constant in a monodisperse medium from the observation of the energy decay in the medium. The result is compared over a large domain of volume fraction with the Keller and the Foldy-Twersky 2D models to determine the domain of their validity. Then the same approach is applied to homogenize the smallest particles in a bidisperse case and determine when such process is adequate.

© 2006 Optical Society of America

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