supposed by the National Natural Science Foundation of China(Nos.50202009,10074023);the National Postdoctoral Foundation(No.2002031222).
The second-order optical nonlinearity of CdS nanoparticles with different diameters of 28.0, 30.0, 31.5, 50.0, and 91.0 A was studied by hyper-Rayleigh scattering technique. Results show that the first-order hyperpola...