Photo- and thermal switching of blue phase films reflecting both right- and left-circularly polarized light

被引：26

作者：

Guo, Jinbao ^{[1
]}

Wang, Jiao ^{[1
]}

Zhang, Junyan ^{[1
]}

Shi, Yang ^{[1
]}

Wang, Xinwei ^{[1
]}

Wei, Jie ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, Coll Mat Sci & Engn, Beijing 100029, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2014年 / 2卷 / 43期

关键词：

LIQUID-CRYSTALS; RANGE; COLOR;

D O I：

10.1039/c4tc01638f

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new kind of blue phase (BP) liquid crystal (LC) films has been developed which could reflect both right- and left-circularly polarized light. Here a free-standing, three dimensional (3D) BP polymer template with around 2/3 the cell thickness was first fabricated by non-uniform photopolymerization of a LC mixture at BP I temperature induced by an ultraviolet light absorbing dye, in which the non-reactive components were removed to achieve a porous polymer template with a right-handed (RH) structure, retaining the 3D structure of BP I. By refilling photoresponsive and left-handed (LH) helical structure BP-LCs containing a chiral azobenzene switch into the polymer template, we finally obtain a BP-LC film with a segregation of RH and LH domains across the LC film, thereby reflecting both right-and left-circularly polarized light. Photo-and thermal switching characteristics of this BP film were investigated in detail. These special optical properties make this kind of BP-LC film interesting for great potential applications in many fields such as flexible LC displays, optical components, LC lasing, etc.

引用

页码：9159 / 9166

页数：8

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