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首页> 外文期刊>Physical Review, B. Condensed Matter >Calculation of the electro-optical and nonlinear optical coefficients of ferroelectric materials from their linear properties
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Calculation of the electro-optical and nonlinear optical coefficients of ferroelectric materials from their linear properties

机译：从铁电材料的线性特性计算其电光和非线性光学系数

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The polarization function, for electrons in an ionic frame that possess a single degree of freedom and two electronic quantum levels, is used to derive formulas for calculating the linear electro-optical coefficients and the coefficient for second harmonic generation (SHG). The resultant analytical formulas contain no adjustable parameters besides the band gap, the index of refraction, and the dielectric constant of the materials that are involved. Because of the inclusion of the ionic coordinate, the model can be used to treat such materials as ferroelectrics in which lattice polarization plays an important role. The electro-optical coefficients and the SHG coefficients, in the case where the electric fields are parallel to the optical axis, are calculated for a large number of materials. The results agree with experimental values within a factor of 2 for most of the materials studied. [S0163-1829(99)09615-0]. [References: 29]
机译：对于具有单个自由度和两个电子量子能级的离子框架中的电子，极化函数用于推导用于计算线性电光系数和二次谐波生成（SHG）系数的公式。除带隙，折射率和所涉及材料的介电常数外，所得的分析公式不含可调参数。由于包含了离子坐标，因此该模型可用于处理晶格极化起重要作用的诸如铁电材料。在电场平行于光轴的情况下，针对大量材料计算电光系数和SHG系数。对于大多数所研究的材料，结果与实验值一致，在2倍以内。 [S0163-1829（99）09615-0]。 [参考：29]

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