NEAR FIELD EFFECTS AND SPECTRAL PROPERTIES OF LAYERED SILVER-COPPER PHTHALOCYANINE NANOCOMPOSITES
Spectral properties have been studied for layered silver — copper phthalocyanine nanocomposites prepared by thermal vacuum evaporation. The samples differ from each other in a number of silver nanolayers and/or in a thickness of copper phthalocyanine (CuPc) separating films. With a decrease in the thickness of the CuPc films from 20 nm to 10 nm, a long-wavelength shift of the maximum of the surface plasmon resonance absorption band and the enhancement in the optical density per unit thickness of these films have been observed. A possible explanation of the phenomenon is that the thinner is the CuPc film, the stronger is the resulting local field in the bulk of the film due to a cojoint contribution from the two neighboring granular Ag nanolayers.