Electro-optic effect and photoelastic effect of feroelectric relaxors
Electro-optic effect and photoelastic effect of feroelectric relaxors
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DOI：
10.7567/jjap.55.10tb05
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发表时间：
2016-09
影响因子：
1.5
通讯作者：
K. Takeda;T. Hoshina;H. Takeda;T. Tsurumi
中科院分区：
文献类型：
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作者：
K. Takeda;T. Hoshina;H. Takeda;T. Tsurumi
为了理解铁电弛豫体电光效应的起源，阐明了二次电光系数、光弹系数和电子密度之间的关系。二次EO系数由光弹性系数和电致伸缩系数的乘积给出。由重元素组成的材料通常表现出高折射率和大的光弹性效应，这表明光弹性系数随材料的电子密度而增加。计算了材料的光弹性系数随材料电子密度的变化关系。在这项研究中推导出的方程进行了实验证实，使用镧添加锆钛酸铅（PLZT）透明陶瓷。研究发现，铁电弛豫体中电光效应的产生是光弹效应和电场诱导应变通过压电效应和电致伸缩效应耦合的结果。
To understand the origin of the electro-optic effect (EO-effect) of ferroelectric relaxors, the relationships among the quadratic EO-coefficient, photoelastic coefficient, and electron density were elucidated. The quadratic EO-coefficient is given by the product of the photoelastic and electrostrictive coefficients. Materials consisting of heavy elements normally exhibit high refractive indices and large photoelastic effects, indicating that the photoelastic coefficient increases with electron density of materials. The photoelastic coefficient was calculated as a function of the electron density of materials. The equations derived in this study were experimentally confirmed using lanthanum-added lead–zirconate–titanate (PLZT) transparent ceramics. It was found that the origin of the EO-effect in ferroelectric relaxors was the photoelastic effect coupled with electric-field-induced strain via the piezoelectric and electrostrictive effects.