Abstract
Thin films of photonic crystals with inverse opal structure were prepared from opal-type templates, using photocurable resin polymerisation. Different techniques for neatly incorporating gold nanoparticles (NPs) into inverse opal films, based on multiple infiltration of water-ethanol solution of gold NPs, were proposed. In a number of cases, a sharp deepening of the transmittance dip in the region of the photonic stop band was observed; this was presumably related to the resonant absorption of NPs. The possibility of an ordered entry of gold NPs into the structure of inverse opal and their influence on the effective refractive index are also discussed. According to the Kramers–Kronig relation, changes in the effective refractive index should be more noticeable on the long-wave side of the plasmon resonance peak. At a gold concentration of about 0.1 µg/mm2, a significant improvement in the properties of photonic crystals can be achieved by the ordering of NP clusters and an increase in the effective refractive index.
Published Version
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