Title :
Large third-order optical nonlinearity in Au:dielectric composite films in femtosecond time scale
Author :
Liao, H.B. ; Xiao, R.F. ; Wang, Huifang ; Wong, Kenaz S. ; Wong, G.K.L.
Author_Institution :
Dept. of Phys., Hong Kong Univ. Sci. & Technol., Hong Kong
Abstract :
Summary form only given.We report here the realization of large third-order nonlinear susceptibility, /spl xi//sup (3)/, from Au:dielectric (SiO/sub 2/ and TiO/sub 2/) composite films near the Au percolation threshold. The composite films were prepared by co-sputtering onto a fused silica substrate. The wavelength dependence of the /spl xi//sup (3)/ was measured by a degenerate four-wave mixing (DFWM) scheme, and its enhancement studied by time-resolved measurements.
Keywords :
composite materials; dielectric thin films; gold; high-speed optical techniques; multiwave mixing; nonlinear optical susceptibility; optical films; percolation; sputtered coatings; Au:dielectric composite film; SiO/sub 2/:Au; TiO/sub 2/:Au; co-sputtering; degenerate four-wave mixing; femtosecond time-resolved measurement; percolation; third-order nonlinear optical susceptibility; Absorption; Delay; Fiber lasers; Gallium arsenide; Luminescence; Optical films; Photoluminescence; Probes; Temperature; Ultrafast optics;
Conference_Titel :
Quantum Electronics Conference, 1998. IQEC 98. Technical Digest. Summaries of papers presented at the International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-541-2
DOI :
10.1109/IQEC.1998.680180
