Millisecond kinetics of photo-darkening/bleaching in xGe45Se55-(1−x)As45Se55 chalcogenide amorphous films J. Appl. Phys. 112, 053105 (2012) Analysis of sub-stoichiometric hydrogenated silicon oxide films for surface passivation of crystalline silicon solar cells J. Appl. Phys. 112, 054905 (2012) Phase evolution and room-temperature photoluminescence in amorphous SiC alloy J. Appl. Phys. 111, 103526 (2012) Resistive switching properties of amorphous Pr0.7Ca0.3MnO3 films grown on indium tin oxide/glass substrate using pulsed laser deposition method Silica glass with dispersed colloid Au particles was synthesized by ion implantation. Colloid Au particles were found to grow through an Ostwald ripening mechanism controlled by diffusion in the silica glass. The third-order nonlinear optical susceptibility xc3) of this glass was found to be proportional to the fourth power of the radius of the colloid particles or the fourth power of the absorption coefficient at the peak of a plasmon band when the total volume of the colloid particles was constant. Furthermore, x (3) of the glass was inversely proportional to the third power of the total volume of colloid particles when the absorption coefficient of the plasmon band was constant.
Au microcrystal-doped glass films with high optical nonlinearity were prepared by the sol-gel method with dip-coating using NaAuCl4•E2H2O and tetraethyl or thosilicate (TEOS) as starting materials. The glass film with an Au/Si atomic ratio of 0.01 was successful ly prepared. The nonlinear susceptibility ƒÔ(3) of the film was 7.7•~10-9esu. Microcrystals with a radius of about 7A and of about 30A coexisted in the glass film. The nonlinear susceptibility of Au microcrystals itself in the film, ƒÔm(3), was 1.0•~10-7esu and was two times larger than that observed in Au-doped glasses pre pared by the melting method. Subsequent heat treat ment of the films at 1000•Ž changed the absorption spectra and decreased ƒÔ(3) by a factor of two. The atom ic ratio of Au/Si was able to be increased to 0.04.
Au+ ions have been implanted in silica glass at an acceleration energy of 1.5 MeV and a fluence level of 1017 ions/cm2. The Au ions form colloid particles with the radius of 2.9 nm after heat treatment. The glass with Au colloid particles shows the large third order non-linear susceptibility; χ(3)=1.2×10-7 esu. The large χ(3) value of the glass is attributed to the high concentration of Au colloid particles in the narrow region.
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