Optical properties of an eccentrically located pigment within an air bubble

We study the orientational average of the scattering efficiencies of scatterers composed by an eccentrically located spherical TiO2 pigment within an air bubble embedded in resin. This study is carried out within a general T-matrix formalism and takes into account the contributions of the asymmetry parameter to the photon transport mean-free path. We perform a detailed comparison of the scattering efficiency of this system with the one corresponding to the same pigment particle embedded directly in resin. We showed that placing a TiO2 pigment eccentrically into an air bubble embedded in resin could not increase the scattering efficiency of the pigment in comparison to a system consisting of the same fractional volume of pigment particles and the same fractional volume of air bubbles acting independently within the same resin. (C) 2003 Published by Elsevier B.V.