Optical properties of assemblies of disc-shaped metallic nanoparticles

The issue of the frequency dependence of optical characteristics for assemblies of metal nanoparticles of different shapes (disc, spheroid, sphere) is considered. Expressions for radiation efficiency, absorption, scattering, and reflection coefficients of assemblies of nanoparticles were obtained. Calculations for disk nanoparticles were performed in the approximation of an equivalent oblate spheroid. Spectral features of optical characteristics determined by the shape, size and material of nanoparticles are described.