文献类型：期刊文献

中文题名：聚合物稳定蓝相液晶的取向控制与电场调谐

英文题名：Orientation control and electric field tuning of polymer-stabilized blue phase liquid crystal

作者：刘梦茹[1];马宇航[1];段霞[1];李博远[1];刘璇[1];张宇贤[1];郑致刚[1]

机构：[1]华东理工大学物理学院,上海200237

年份：2026

卷号：41

期号：4

起止页码：463

中文期刊名：液晶与显示

外文期刊名：Chinese Journal of Liquid Crystals and Displays

收录：;WOS:【ESCI(收录号:WOS:001807686700001)】；北大核心:【北大核心2023】；

基金：Supported by National Key Research and Development Program of China (No. 2022YFA1203700); Basic Science Center of National Natural Science Foundation (No. T2488302); National Natural Science Foundation. of China (No. 62275081, No. 62575101, No. 62575014); Shanghai Municipal Education Commission (No. 2021-01-07-00-02-E00107)

语种：中文

中文关键词：液晶;聚合物稳定蓝相;电调谐;光取向;全息

外文关键词：liquid crystals;polymer-stabilized blue phase;electrically tunable;photoalignment;holography

摘要：蓝相液晶作为具有自组装三维晶格结构的光子晶体,在可调谐光子器件及光谱调控等领域展现出广阔的应用前景。为拓展蓝相液晶的反射光谱范围,本研究提出电调谐聚合物稳定蓝相液晶的方案,并进行理论分析和数据表征。首先,通过光取向技术获得均一排列的单畴蓝相液晶,利用紫外光固化其中单体形成聚合物网络,制备具有良好热稳定性的聚合物稳定蓝相液晶。对液晶盒施加直流电场诱导其晶格变形,实现反射光谱的宽范围调谐。进一步地,将光学相位信息编码至液晶分子的取向分布,通过聚合物稳定蓝相液晶的图案化取向,实现了全息显示应用。结果表明,聚合物稳定蓝相液晶在直流电场作用下可以实现反射光谱中心波长在439~662 nm波段范围的可逆调谐,基于反射式全息相位设计可以重现出可见光范围的彩色图像。该研究为构建稳定且电可调谐宽反射波段的功能材料提供了有效方案,在信息显示、光学加密和光子器件等领域展现出应用潜力。
Blue phase liquid crystals(BPLCs),as self-organized three-dimensional photonic crystals,have demonstrated broad application prospects in tunable photonic devices and spectral modulation.To broaden their range of reflection,we propose an electrically tunable polymer-stabilized blue phase liquid crystal(PSBPLC)system and validate it through theoretical analysis and experimental characterization.First,uniform monodomain BPLC is obtained via photoalignment,followed by photopolymerization to form polymer networks,thereby enhancing the structural stability.Subsequently,by applying a direct current(DC)voltage upon the liquid crystal cell,lattice deformation is induced,enabling wide-range tuning of the reflection spectrum.Furthermore,optical phase information is encoded into the orientation distribution of liquid crystal molecules,enabling holographic display applications via patterned alignment of PSBPs.Results indicate that,under the influence of DC electric field,the central wavelength of the reflection spectrum can be reversibly tuned from 439 nm to 662 nm.The corresponding reflective holographic phase design can reconstruct color images across the visible spectrum.This work provides a viable approach for developing stable,electrically tunable materials with a broad reflection range,showing promising potential in fields such as information display,optical encryption and photonic devices.