Abstract
Rayleigh and Hyper-Rayleigh scatterings (HRS) from the nano-particle SnO 2 were measured. It is found that as the concentration of the colloidal SnO 2 or radiation power increases, the first- and second-order polarizabilities decrease. The radiation power dependencies of the first- and second-order polarizabilities show two domains: in the high radiation power domain, the first- and second-order polarizabilities are approximately constant; in the low radiation power domain, the first- and second-order polarizabilities increase sharply and become sensitive to the radiation power. The behavior of the concentration dependencies of the first- and second-order polarizabilities of colloidal SnO 2 particles is similar to that of the radiation power dependence. A detailed mechanism explaining these phenomena has been discussed.
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