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2 March 2020 Optical properties of hybrid films of inhomogeneous ensemble of gold nanoparticles coated by cyanine J-aggregates
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Abstract
Hybrid nanostructures that couple plasmon and exciton resonances generate hybridized energy states, which may result in unusual light-matter interactions. In our work we studied island films from the inhomogeneous ensemble of gold nanoparticles obtained by thermal vacuum deposition, spin-coated with a molecular layer of cyanine dye, in which Jaggregates were formed. The influence of the cyanine dye length chain of conjugation and the thickness of the island film on the optical properties of the hybrid structure was studied. The increase of the molecule absorption is observed for pseudoisocyanine, in comparison with mono- and dicarbocyanine dyes. The transparency in the absorption spectrum of a hybrid film with pseudoisocyanine was observed at a wavelength of 583 nm corresponding to the maximum of the Jaggregate band, which can be explained by the strong coupling of the exciton transition in the J-aggregate with the plasmon resonance of nanoparticles.
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Rezida D. Nabiullina, Anton A. Starovoytov, Igor A. Gladskikh, and Daler R. Dadadzhanov "Optical properties of hybrid films of inhomogeneous ensemble of gold nanoparticles coated by cyanine J-aggregates", Proc. SPIE 11291, Quantum Dots, Nanostructures, and Quantum Materials: Growth, Characterization, and Modeling XVII, 1129113 (2 March 2020); https://doi.org/10.1117/12.2556089
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