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- W2020594578 abstract "Abstract Gold nanocluster thin films (∼ 200 nm thickness) consisting of metal clusters ∼ 5 nm in size embedded in a matrix of Nb2O5 were deposited by ion beam-assisted deposition (IBAD) by coevaporation of Au and Nb with O2+ ion bombardment. The microstructure and optical characteristics of these films were examined as-deposited and after annealing at 600°C. Annealing crystallized the amorphous oxide matrix and ripened the nanoclusters. A strong linear absorption at the wavelength of the surface plasmon resonance for Au developed as a result of annealing. The linear optical behavior was modeled using Mie scattering theory. Good agreement was found between the nanocluster sizes predicted by the theory and the particle sizes observed experimentally using transmission electron microscopy (TEM). The nonlinear optical (NLO) properties of the nanocluster films were probed experimentally using degenerate four wave mixing and nonlinear transmission. The wavelength was near the peak of the surface plasmon resonance as measured by VIS/UV spectroscopy. Values of |χxxxx(3)| were 7.3 × 10−8 and 3.0 × 10−10 esu for annealed and unannealed samples, respe The dominant mechanism for the nonlinear response was change in dielectric constant due to the generation of a distribution of hot, photoexcited electrons." @default.
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- W2020594578 date "1997-05-01" @default.
- W2020594578 modified "2023-09-27" @default.
- W2020594578 title "Ion-beam-assisted deposition of Au nanocluster/Nb2O5 thin films with nonlinear optical properties" @default.
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- W2020594578 doi "https://doi.org/10.1016/s0168-583x(96)00990-1" @default.
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