摘要
金原子团簇在 32 0nm ,470nm ,5 80nm ,72 0nm处产生 4个共振散射峰 .它是一种非线性光学介质 ,当入射光的频率γ不同时可获得金原子团簇的 2γ倍频、γ/2分频、γ/3分频、 2γ/3分频散射峰 .探讨了影响散射光信号强度I(λ)的主要因素即散射光能量分布、强度分布比率、粒径d、Δλ (λex-λ)和散射光辐射度 .
The Au clusters in liquid exhibit four resonance scattering peaks at 320 nm ,470 nm, 580 nm and 720 nm. It is a nonlinear optical medium. A 1/2 fraction frequency scattering peak at 580 nm(1/2×1 03×10 15 Hz) and a 1/3 fraction frequency scattering peak at 870 nm(1/3×1 03×10 15 Hz) were obtained as the excited wavelength at 290 nm(1 03×10 15 Hz). When the excited wavelenth is at 580 nm(5 02×10 14 Hz), a double frequency scattering peak at 290 nm(2×5 02×10 14 Hz) and a 2/3 fraction frequency scattering peak at 870nm(2/3×5 02×10 14 Hz) display. When the excited wavelength is at 870 nm(3 34×10 14 Hz), a three times frequency scattering peak at 290 nm(3×3 34×10 14 Hz) and a 3/2 fraction frequency scattering peak at 580 nm(3/2×3 34×10 14 Hz).The influence of the scattering light energy, ratio of intensity distribution, diameter, Δλ(λ ex - λ em ) and the spectral radiance of scattering R λ ex emitted by the clusters on scattering signal I(λ) has been considered. A reasonable scattering light intensity function for Au clusters in liquid has been proposed.
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2001年第2期174-178,共5页
Journal of Southwest China Normal University(Natural Science Edition)
基金
国家自然科学基金项目 ( 2 9875 0 19)
广西自然科学基金项目 ( 9912 0 2 1)
