Abstract
Au/SiO2 multilayer composite films containing nonspherical Au particles were prepared by a magnetron sputtering method. Uniform size and shape distributions of Au particles were obtained in these films. Au particles embedded in these films can be shaped into spheres or ellipsoids by controlling the thickness of the Au layer, and the thermal annealing temperature and time duration. Their linear optical properties were characterized in the wavelength range between 300–1000 nm. Their effective nonlinear optical susceptibility, χ(3), was found to be much larger than that prepared by the cosputtering method at low Au volume fraction. We attributed the enhancement of the value of χ(3) to the more uniform size and shape distribution, as well as the higher two-dimensional metal particle density in the multilayer films.
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81.15.Cd, 78.66.Sq, 42.65.An
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Liao, H., Wen, W. & Wong, G. Preparation and characterization of Au/SiO2 multilayer composite films with nonspherical Au particles. Appl. Phys. A 80, 861–864 (2005). https://doi.org/10.1007/s00339-003-2328-9
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DOI: https://doi.org/10.1007/s00339-003-2328-9