The structural beauty of liquid crystalline blue phases is attested not only by their colorful optical micrographic textures but also by optical isotropy. More importantly, the homogeneity of the structures influences greatly to the electro‐optic properties. In this work, how the lattice orientation in polymer‐stabilized blue phase liquid crystal (PS‐BPLC) diffraction grating affects phase‐modulated diffraction efficiency is elaborated. A well‐arranged monodomain structure of blue phase is achieved and its diffraction capability is compared with multidomain PS‐BPLC. The diffraction efficiency in the zeroth order of monodomain PS‐BPLC is improved by 9% compared to that of multidomain structure. In addition, both driving and threshold voltages in monodomain PS‐BPLC are decreased by 29% and 30%, respectively, compared to those in multidomain PS‐BPLC owing to the regular arrangement of cubic lattices that give rise to increase in the coherence length and unified response in molecular reorientation under electric fields. Furthermore, the monodomain PS‐BPLC shows an efficient polarization conversion of linear polarization into circular polarization. It is believed that the device exhibits great potential to be used as a polarization converter or beam steering devices.

中文翻译：

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聚合物稳定的单畴蓝相衍射光栅

液晶蓝相的结构美不仅可以通过其多彩的光学显微照片纹理得到证明，还可以通过光学各向同性得到证明。更重要的是，结构的均匀性对电光特性有很大的影响。在这项工作中，阐述了聚合物稳定的蓝相液晶（PS-BPLC）衍射光栅中的晶格取向如何影响相位调制的衍射效率。实现了蓝相的排列整齐的单畴结构，并将其衍射能力与多畴PS-BPLC进行了比较。与多域结构相比，单域PS‐BPLC零级衍射效率提高了9％。此外，单域PS‐BPLC中的驱动电压和阈值电压分别降低了29％和30％，与多域PS-BPLC相比，由于立方晶格的规则排列会增加电场下分子重新定向的相干长度和统一响应。此外，单畴PS-BPLC显示出线性极化到圆极化的有效极化转换。可以相信该装置具有很大的潜力，可以用作偏振转换器或光束转向装置。