Plasmon resonant absorption and third-order optical nonlinearity in Ag-Ti cosputtered composite films
- Department of Physics, Wuhan University, Wuhan 430072 (China)
A series of Ag/titanium oxide composite films with Ag atom concentration of 28%-82% were prepared by cosputtering technique. The scanning electron microscopy and the x-ray photoelectron spectroscopy studies reveal that metallic Ag nanoparticles with a size of 20-50 nm disperse in titanium oxide. The plasmon resonance absorption peak of the embedded Ag nanoparticles shifts to about 860 nm at Ag atom concentration of 42%, the nonlinear absorption coefficient {beta}{sub eff} and the nonlinear refractive index {gamma} are -1.4x10{sup 5} cm/GW and 3.8 cm{sup 2}/GW, respectively, which were measured by the Z-scan technique at 790 nm with a peak irradiance of 1.8 GW/cm{sup 2}. The corresponding third-order susceptibility {chi}{sup (3)} is about 4.7x10{sup -7} esu.
- OSTI ID:
- 20787795
- Journal Information:
- Journal of Applied Physics, Vol. 99, Issue 2; Other Information: DOI: 10.1063/1.2165410; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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