Au-TiO2 dis-conductive composite films with Au atom concentrate as high as 82% are prepared by using reactive co-sputtering technique. The annealing effect on the nanostructures and optical nonlinearities of the compo...Au-TiO2 dis-conductive composite films with Au atom concentrate as high as 82% are prepared by using reactive co-sputtering technique. The annealing effect on the nanostructures and optical nonlinearities of the composite films are investigated. A u nanoparticles aggregated to semi-continuum network structures during the annealing processes. As the annealing temperature increases from 25℃ to 400℃, the surface plasmon absorption band is shifted and its strength is increased, consequently, the nonlinear absorption coefficient β decreases from 5.6 × 10^4 cm/GW to -1.7 × 10^4 cm/GW, while the nonlinear refractive index ~ increases from -0.95 cm^2/GW to 1.3 cm^2/GW.展开更多
基金Supported by the Natural Science Foundation of China under Grant No 10534030 and the National Basic Research Programme of China under Grant No 2006CB921500.
文摘Au-TiO2 dis-conductive composite films with Au atom concentrate as high as 82% are prepared by using reactive co-sputtering technique. The annealing effect on the nanostructures and optical nonlinearities of the composite films are investigated. A u nanoparticles aggregated to semi-continuum network structures during the annealing processes. As the annealing temperature increases from 25℃ to 400℃, the surface plasmon absorption band is shifted and its strength is increased, consequently, the nonlinear absorption coefficient β decreases from 5.6 × 10^4 cm/GW to -1.7 × 10^4 cm/GW, while the nonlinear refractive index ~ increases from -0.95 cm^2/GW to 1.3 cm^2/GW.
