Anisotropy of The Electro-Optic Kerr Effect in Polymer-Stabilized Blue Phases
Anisotropy of The Electro-Optic Kerr Effect in Polymer-Stabilized Blue Phases
复制标题
聚合物稳定蓝相中电光克尔效应的各向异性
DOI：
10.1103/physreve.91.022503
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发表时间：
2015
影响因子：
2.4
通讯作者：
Yuto Kawata
中科院分区：
文献类型：
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作者：
Yuto Kawata
液晶聚合物稳定蓝相（PSBP）是下一代电光开关器件的候选材料，因为它们形成自组织三维周期结构并表现出亚毫秒级的快速响应时间。考虑到 PSBP 的晶体结构，可以直观地认为电光效应取决于所施加电场的方向；然而，这种关系尚未得到调查。在本研究中，我们制备了两种样品，其中（110）和（200）平面平行于基板取向，并研究了当在两种基板之间施加场时的电光克尔效应。两个样品表现出不同的行为，(110)取向样品的克尔系数比(200)取向样品的克尔系数大20%。这些结果表明，PSBP 的电光克尔效应不是各向同性而是各向异性，就像立方光学晶体一样。
Liquid crystalline polymer stabilized blue phases (PSBPs) are candidate materials for next generation electro-optic switching devices because they form a self-organized three-dimensional periodic structure and exhibit a fast response time of submillisecond order. Considering the crystallographic structures of PSBPs, it is intuitive to believe that the electro-optic effect would depend on the direction of the applied electric field; however, this relationship has not yet been investigated. In this study, we prepared two kinds of samples in which the (110) and (200) planes were oriented parallel to the substrates, and investigated the electro-optic Kerr effect as a field was applied between the two substrates. The two samples exhibited differing behaviors, with the Kerr coefficient of the (110)-oriented sample being larger by 20% than that of the (200)-oriented sample. These results imply that the electro-optic Kerr effect of PSBPs is not isotropic but anisotropic, just like cubic optical crystals.