The results of an experimental study of the effect of gold and silver nanoparticles (NPs) on the optical absorption and luminescence of erythrosine molecules in a polyvinyl alcohol (PVA) film are presented. It is shown that the presence of plasmonic NPs leads to an increase of the light absorption by molecules, a reduction of the phosphorescence lifetime and a non-monotonic change of the fluorescence and phosphorescence intensity of molecules depending on the concentration of NPs. As the NPs concentration increases, an increase of the lumines-cence intensity is first observed, which after reaching the maximum is replaced by a decrease.
33.50.-j Fluorescence and phosphorescence; radiationless transitions, quenching
$^1$Orenburg State University
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