Mathematical Modeling Of Spectral Selective Absorption And Reflection Of Light By Metal-Dielectric Composites

Metal-dielectric absorbing composite coatings are widely used in solar cell elements, as 'black' coatings in optical instruments. An approach to theoretical evaluation of spectral dependent absorption and Fresnel reflection coefficients for a concentrated system of absorbing spherical metal particles imbedded in a dielectric matrix is presented. The approach is based on the renormalised cluster expansion for the dielectric function of a disordered system of strongly absorbing dipole scatterers. Dipole-dipole interaction depending on the particle concentration are taken into account. The calculation procedure predicts optical behaviour of particulate metal composite coatings on glass.