nonlinear susceptibility

The nonlinear absorption coefficient ( B), the nonlinear refractive coefficient ( n2) and the third-order nonlinear susceptibility ( X ( 3)) of three monomers and some polymers were fitted and calculated. The relationship between nonlinear optical properties and molecular structures was discussed.

对它们的非线性吸收和非线性折射进行拟合，计算得到非线性吸收系数β、折射率n以及三阶非线性系数X~（3），并探讨了分子结构和材料性能之间的关系。

Starting from SSH model and applying the third-order time-dependent perturbation theory, the optical nonlinear susceptibility of one dimensional system has been studied.

本文从SSH模型出发，用三阶含时微扰研究了一级体系的非线性光学系数。

Third-order nonlinear susceptibility x ( 3) (-ω; ω,ω,-ω) is calculated in nearly-degenerate quasi-two-level system by perturbation method.

我们用微扰方法计算了近简并准二能级系统的三阶非线性极化率x~（3）（-ω；ω，ω，-ω）。

Bismuth triiodide crystal has large value of the third-order nonlinear susceptibility. The material is suitable for the study of the microprocesses of nonlinear optical phenomena.

碘化铋晶体具有大的三阶非线性效应，是研究非线性光学微观过程的最合适的材料。

The third-order nonlinear susceptibility of ga Ilium arsenide under irradiation of CW CO_2 laser

砷化镓晶体在连续CO2激光作用下的三阶非线性系数

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。

Also we have elaborated the calculation of Raman linewidth, Raman scattering cross section, transitions between energy levels of the particle number density difference that are crucial in the third-order nonlinear susceptibility expressions. 3.

对三阶非线性共振极化率表达式中拉曼线宽、拉曼散射截面及跃迁能级之间的粒子数密度差的计算分别进行了详细讨论。

Nonlinear susceptibility tensor for the sum frequency generation is derived and validated in the second harmonic generation.

推导得出对于和频情况下的非线性极化张量的表达式，并应用于倍频情况进行了验证。

The second order nonlinear susceptibility and SHG signal in the different system

不同晶系中二阶非线性极化率及SHG信号的研究

Third-order Nonlinear Susceptibility in a nc-Si/ SiO_2 Spherical Quantum Dot

nc-Si/SiO2球形量子点的三阶极化率

Under Quasi-static approximation, based on the non-diluted condition, the analytical expression of the effective dielectric constant and third-order nonlinear susceptibility of granule composite system was obtained in our research.

在准静态近似下，我们推导得出非稀释情况下，颗粒复合体系的有效线性介电常数和有效三阶非线性极化率的解析表达式。

Our calculation result demonstrated that the maximum value of optical linear absorption peak and effective third-order nonlinear susceptibility of the system could be achieved simultaneously if appropriate interfacial structure parameters were chosen.

数值计算结果表明，可以选择合适的界面结构参数，使体系的光学线性吸收峰和有效三阶非线性极化率同时达到最大值。

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。