The Absorptivity of a Nanocomposite Layer with Spherical Metal Inclusions

The dependences of the absorptivity of a nanocomposite layer (a dielectric matrix with spherical metal inclusions) on the frequency, the volume fraction, the size of inclusions, the thickness of the layer, and the angle of incidence of the wave on it are studied. It is shown that the particular features of optical characteristics are related with the plasmon resonance in nanoparticles and the resonant-frequency dependence of the dielectric permittivity of the composite medium. The values of film parameters and frequency intervals in which the incident radiation is absorbed almost completely are found.