nonlinear refraction

The Measurement of Optical Nonlinear Refraction Index of ( Na_0.5Bi_0.5) TiO_3 Thin Films Using a Z-scan Technique

Z-扫描技术测量（Na（0.5）Bi（0.5））TiO3薄膜非线性折射率

The cubic nonlinear refraction index n2 and the nonlinear absorption coefficient α 2 of the ruthenium(ⅱ) complexes are measured by Z-scan techniques and the third-order nonlinear susceptibility χ( 3), and hyperpolarizability γ of the complexes are calculated.

运用Z-扫描的实验方法研究了钌（Ⅱ）配合物的三阶非线性折射率n22和非线性吸收系数α2，并由此计算出它们的三阶非线性系数χ（3）和分子超极化率γ。

The measured third-order nonlinear susceptibility of DMSO is about one-quarter of that of CS2 with the CS2 as reference by optical kerr effect experiment. The nonlinear susceptibility of DMSO comes from the nonlinear refraction, namely the real part of third order susceptibility.

用CS2作为参考样品，测量得到了DMSO的三阶非线性极化率幅值约为CS2的四分之一，而且主要来自于非线性折射的贡献，即三阶非线性极化率的实部。