Toshiaki IWAI, Hideaki FURUKAWA and Toshimitsu ASAKURA

Research Institute for Electronic Science, Hokkaido University, Sapporo, Hokkaido 060 Japan

(Received May 1, 1995; Accepted August 2, 1995)

Enhanced backscatterings from the disordered dense media are investigated by means of the Monte Carlo simulation. On the basis of the Rayleigh-Debye scattering theory, numerical simulations demonstrate the dependences of the peak, width and spatial anisotropy of enhanced intensity distributions on the size of scattering particles. Discussions are made by decomposing the backscattering intensity to the contributions with different scattering orders. As a result, it is shown that the particle-size dependence of the peak and width is described by the probability density function of the scattering order and the mean free pathlength. It is also shown that the spatial anisotropy of the intensity peak is described by the depolarization at each scattering event and the extinction in propagation within the random media.

Key words : coherent backscattering, enhanced backscattering, spatial anisotropy, weak localization of photon, Monte Carlo simulation