Light propagation near turbid-turbid planar interfaces

The aim of this paper is to solve the diffusion equation in the case of two semi-infinite homogeneous scattering and absorbing media separated by a fl at interface when a light source S is placed in one of these media. We pres ent here a new approach which allows us to work directly in real space and to establish efficient analytical expressions for space and time resolved a verage intensity distributions in both media. The results obtained by this method are compared with Monte Carlo simulations. This new approach permits very efficient numerical processing, which is a decisive criterion for the study of light propagation in layered turbid media. (C) 2000 Published by Elsevier Science B.V.