Spectral and Concentration Dependences of the Optical Properties of Thin Layers of Oxidized Amorphous Copper and Nickel Nanoparticles in the Infrared Spectral Region

摘要

The optical properties of thin layers of nanostructures based on oxidized amorphous copper and nickel granules are studied in the IR spectral region. The absorption spectra of layers are calculated taking into account luminescence. It is noted that the spectral features of the absorption coefficients of these nanostructures are determined by the enhanced absorption and luminescence of oxides in the vicinity of metal nanoparticles. A nonmonotonic concentration dependence of the absorption and transmission coefficients of oxidized copper nanoparticles on a silicon substrate in the IR region is found. The absorption maximum corresponds to the oxide shell layer that is half-filled with nanostructured metal. The concentration dependences of absorption coefficients of nanostructures based on oxidized nickel particles exhibit features at different wavelengths in the IR spectral region.