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nonlinear susceptibility
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  “nonlinear susceptibility”译为未确定词的双语例句
    Synthesis and properties of Third-order Nonlinear Susceptibility of PSB
    含三芳胺聚希夫碱的合成与三阶非线性电极化率的测量
    During the past decade, the photonic band gap structure has attracted considerable research attentiono In general, nonlinear photonic band gap structures are structures in which the nonlinear susceptibility is a periodic function in space.
    光子晶体(photonic crystals简称:PC)是折射率在空间周期性变化的介电结构,其变化周期和光的波长为同一个数量级。
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    Molecular properties suchas dipole moment,force constant,field gradient at the nucleus and nonlinear susceptibility can be calculated in terms of these parameters.
    文中还利用这个方法导出了键矩、力常数、场梯度、晶体的非线性光学系数等重要物理量的理论公式.
短句来源
    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。
短句来源
    Approximate theoretical expressions are given for dipole moment, field gradient at the nucleus, and nonlinear susceptibility of crystals.
    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。
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  nonlinear susceptibility
It has been shown that relatively high levels of third-order nonlinear susceptibility of polymers can be obtained without the use of highly conjugated systems.
      
Divergence of the nonlinear susceptibility indicative of the phase transition is established.
      
Nonlinear susceptibility of nonsymmetric quantum systems
      
The results are compared with a theoretical calculation on the assumption that the nonlinear susceptibility is caused by the nonparabolicity of the conduction bands.
      
We show that in the thermodynamic limit the irreducible part of the nth-order nonlinear susceptibility indicates that the eigenstates of the system contain entangled (n + 1)-qubit clusters.
      
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An electrostatic three-center model with four parameters _m,q,△E and fordiatomic bonds was proposed,based on Hellmann-Feyniman theorem with someadditional assumptions.Equations relating these four parameters with the effectivenuclear charges and covalent radii of the atoms were derived.Molecular properties suchas dipole moment,force constant,field gradient at the nucleus and nonlinear susceptibility can be calculated in terms of these parameters.The results of calculation arebasical in agreement with experimental...

An electrostatic three-center model with four parameters _m,q,△E and fordiatomic bonds was proposed,based on Hellmann-Feyniman theorem with someadditional assumptions.Equations relating these four parameters with the effectivenuclear charges and covalent radii of the atoms were derived.Molecular properties suchas dipole moment,force constant,field gradient at the nucleus and nonlinear susceptibility can be calculated in terms of these parameters.The results of calculation arebasical in agreement with experimental values.

本文提出了一个双原子键的三中心静电模型,并导出了支撑这个模型的有效键电荷等四个物理参量表达式,从而提供了一个定量研究一些物理化学现象的半经验方法.文中还利用这个方法导出了键矩、力常数、场梯度、晶体的非线性光学系数等重要物理量的理论公式.在不用可调整参数下所得各物理量的计算值同实测值基本相符.

At the level of INDO/CI methods, using the program for calculations of thesecond-order nonlinear susceptibilites (β_(ijk)) written by ourselves, we calculated theβ_(ijk) of aniline, nitrobenzene, ρ-nitroaniline and 4-nitro-4′-aminostilbene and inves-tigated dependence of β_(ijk) on LASER frequencies. It is shown that the intramolecular charge transfer is the origin of the nonlinearoptics phenomenon and the LASER field plays an important role to the magnitude anddirection of the second-order nonlinear optics...

At the level of INDO/CI methods, using the program for calculations of thesecond-order nonlinear susceptibilites (β_(ijk)) written by ourselves, we calculated theβ_(ijk) of aniline, nitrobenzene, ρ-nitroaniline and 4-nitro-4′-aminostilbene and inves-tigated dependence of β_(ijk) on LASER frequencies. It is shown that the intramolecular charge transfer is the origin of the nonlinearoptics phenomenon and the LASER field plays an important role to the magnitude anddirection of the second-order nonlinear optics susceptibility. When the LASER frequency is close to the molecular resonance frequency, thesecond-order nonlinear susceptibility becomes larger, before and after the resonancefreguence, β_(ijk) changes its sign and the Kleinman symmetry begins to break down.

在INDO/CI方法基础上,用自己编制的计算二阶非线性极化系数βijk程序,计算了苯胺、硝基苯、对硝基苯胺和4-硝基-4′-胺基二苯乙烯的βijk,并研究了其对外部激光场频率的依赖关系。结果表明,分子内的电荷转移是产生非线性光学现象的根本原因,而作为外因的激光场对二阶非线性光学系数的大小和方向也有直接的重要作用。当激光场频率与分子的共振频率接近时,二阶非线性极化系数变得非常大,在共振频率附近,βijk改变符号且Kleinman对称性被打破。

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. In this paper the synthesis , purification and crystal growth of bismuth triiodied by sublimation-pulling methed are reported. The large size single crystal of Φ10×60mm was obtained,Its density is 5.81g/cm ̄3 at 25 ℃. From X-ray diffraction analysis, the space group is R 3 and lattice parameters are a=0.725 5 nm and...

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. In this paper the synthesis , purification and crystal growth of bismuth triiodied by sublimation-pulling methed are reported. The large size single crystal of Φ10×60mm was obtained,Its density is 5.81g/cm ̄3 at 25 ℃. From X-ray diffraction analysis, the space group is R 3 and lattice parameters are a=0.725 5 nm and c=2.07 3nm.Thermal analysis shows no phase transition from room temperature to 400℃.

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。本文报道了碘化铋的合成、提纯以及升华-提拉生长大碘化铋单晶的工艺条件。获得尺寸为Φ10×60mm的大单晶,测得晶体的密度为5.81g/cm ̄3,X射线衍射分析表明,室温下空间群为R-3,点阵常数为a=0.7522nm,c=2.073nm。热分析显示从室温到400℃之间的无相变。

 
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