电子共振增强有利于提高三阶非线性光学系数。
It was confirmed that the resonant of electron could enhance the third-order nonlinear optical coefficient greatly.
第二部分是金属酞菁衍生物的二阶非线性光学系数的测定。
The second part reports the estimation of organic second-order nonlinear optical coefficient of the metal-phthalocyanine derivatives.
建立了偶极矩、核四极矩偶合常数中的场梯度及晶体非线性光学系数的近似理论表达式。
Approximate theoretical expressions are given for dipole moment, field gradient at the nucleus, and nonlinear susceptibility of crystals.
用INDO／SDCI方法研究了酞菁锌的电子结构、紫外-可见光谱、三阶非线性光学系数及其色散效应。
The electronic structure, UV-visible spectrum, nonlinear third-order optical susceptibility and its dispersion of zinc phthalocyanine(ZnPc)were studied by using INDO/SDCI method.
结果表明：二苯胺双席夫碱类化合物具有较大的非线性光学系数，从理论上为进一步探索优质非线性光学材料提供依据。
The result showed that two - aniline - two schiffs bases has bigger nonlinear optical coefficient. It provides the theory foundation for go further research on good nonlinear optical materials.
因此，可以从硼酸盐晶体的阴离子基团电负性出发估算其最大二次非线性光学系数，这就为寻找新型的二次非线性光学硼酸盐晶体提供了理论依据。
So, we can estimate the maximal second NLO coefficients of borate crystals from their EN of anion groups, which can be used to search new second NLO borate crystals.
因此，可以从硼酸盐晶体的阴离子基团电负性出发估算其最大二次非线性光学系数，这就为寻找新型的二次非线性光学硼酸盐晶体提供了理论依据。
So, we can estimate the maximal second NLO coefficients of borate crystals from their EN of anion groups, which can be used to search new second NLO borate crystals.
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