文献类型：期刊文献

英文题名：Light-Activated Liquid Crystalline Hierarchical Architecture Toward Photonics

作者：Ma, Ling-Ling[1,2];Hu, Wei[1,2,3];Zheng, Zhi-Gang[4];Wu, Sai-Bo[1,2,3];Chen, Peng[1,2,3];Li, Quan[5,6];Lu, Yan-Qing[1,2]

机构：[1]Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Key Lab Intelligent Opt Sensing & Manipulat, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China;[2]Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210093, Jiangsu, Peoples R China;[3]JITRI, Inst Smart Liquid Crystals, Changshu 215500, Jiangsu, Peoples R China;[4]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[5]Kent State Univ, Liquid Crystal Inst, Kent, OH 44242 USA;[6]Kent State Univ, Chem Phys Interdisciplinary Program, Kent, OH 44242 USA

年份：2019

卷号：7

期号：16

外文期刊名：ADVANCED OPTICAL MATERIALS

收录：;EI(收录号：20193407353415);WOS:【SCI-EXPANDED(收录号:WOS:000481861500002)】；

语种：英文

外文关键词：hierarchical superstructures; light-activated phenomena; liquid crystals; photonics

摘要：Hierarchical architectures are of vital importance in materials science and nanotechnology. Among various building blocks, liquid crystals (LCs) have attracted particular attention due to their excellent controllability of self-assembly behavior and the resultant physical properties. In recent years, interest in light-activated LC hierarchical superstructures has emerged for a wide range of applications beyond LC displays. This report consists of two main parts: the light-activated LC hierarchical architectures and their corresponding photonic applications. In the first part, different smectic layer curvature controlling methods are introduced to produce periodic defect arrays. By taking the advantages of photoalignment techniques and light-driven molecular motors, cholesteric LC helical superstructures are highly manipulated, including pitch tuning, helix rotation, and chirality inversion. As a mutually concerned scientific issue, the photoresponsive properties of blue phase (BP) hierarchical superstructures are also introduced, enabling unique BP materials and devices driven by a facile light stimulation. Moreover, traditional optics (microlens and beam steering) and advanced photonics (specific optical field generation and LC lasers) are reviewed in the second part. It is believed that the developments introduced here can open a door for the concept of "smart optical materials" based on the self-assembled soft LC superstructures.