摘要
液相金原子团簇是一种非线性光学介质 .它在 580 nm处产生一个最强共振散射峰 .当激发波长为 2 90 nm(1 .0 3× 1 0 15Hz)时 ,液相金原子团簇在 580 nm(1 /2× 1 .0 3× 1 0 15Hz)和870 nm(1 /3× 1 .0 3× 1 0 15Hz)分别产生一个 1 /2分频和 1 /3分频散射峰 ;当激发波长为 580 nm(5.0 2× 1 0 14 Hz)时在 2 90 nm(2× 5.0 2× 1 0 - 14 Hz)和 870 nm(2 /3× 5.0 2× 1 0 14 Hz)分别产生一个2倍频和 2 /3分频散射峰 ;当激发波长为 870 nm(3.34× 1 0 14 Hz)时在 580 nm(3/2× 3.34× 1 0 14Hz)和 2 90 nm(3× 3.34× 1 0 14 Hz)分别产生一个 3/2分频和 3倍频散射峰 .分频散射和倍频散射峰与共振散射峰具有相似的散射行为 .从激励光与液相金原子团簇相互作用的运动方程出发 ,根据傅氏变换理论 。
The Au clusters in liquid is a nonlinear optical medium.A 1/2 fraction frequency scattering peak at 580nm (1/2×1.03×10 15 Hz) and a 1/3 fraction frequency scattering peak at 870nm (1/3× 1.03×10 15 Hz) were obtained as the excited wavelength at 290nm (1.03×10 15 Hz).When the excited wavelength is at 580nm (5.02×10 14 Hz),a double frequency scattering peak at 290nm (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 870nm (3.34×10 14 Hz),a three times frequency scattering peak at 290nm (3×3.34×10 14 Hz) and a 3/2 fraction frequency scattering peak at 580nm (3/2×3.34×10 14 Hz).The results show that fraction frequency scattering and double frequency scattering have the similar scattering behaviour as the resonance scattering.According to the interaction equation of the excited light and gold clusters,and Fourier transformation theory,some nonlinear scattering phenomena have been discussed.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2001年第4期460-464,共5页
Acta Photonica Sinica
