Features of light absorption by an ensemble of microcapsules

Abstract

Features of laser radiation scattering and absorption by an ensemble of two identical microcapsules are theoretically studied. Each capsule is modeled by a two-layer spherical micron-size particle consisting of water core and light absorbing polymer shell. By the numerical electrodynamics techniques, it is shown that the internal structure and mutual arrangement of particles affect the spatial distribution and amplitude characteristics of the power absorbed. The highest values of the absorbed power density in model microcapsules could be attained if the particles are shifted relative to each other by a distance of about their diameter (strongly absorbing particles) or if the particles are in the geometric shadow of each other (weak absorption).