Bandwidth-controllable reflective polarisers based on the temperature-dependent chiral conflict in binary chiral mixtures
Bandwidth-controllable reflective polarisers based on the temperature-dependent chiral conflict in binary chiral mixtures
复制标题
基于二元手性混合物中温度依赖性手性冲突的带宽可控反射偏振器
DOI：
10.1080/02678292.2010.540043
复制
发表时间：
2011-01-01
期刊：
影响因子：
2.2
通讯作者：
Yang, Huai
中科院分区：
文献类型：
--
作者：
Cheng, Zihui;Li, Kexuan;Yang, Huai
In this study, we demonstrate a new method for obtaining a binary chiral mixture (BCM) which exhibits an unprecedented temperature-dependent helical twisting power (HTP) by utilising the chiral conflict between two chiral dopants with opposite handedness and HTP temperature dependence. Different from the common chiral dopant reported before, the addition of such a BCM could increase the clearing temperature of the host liquid crystal (LC). Due to the sufficiently large HTP value of the BCM, the three primary colours (blue, green and red) can be easily reflected by the nematic liquid crystal (N-LC)/BCM mixture at different temperatures. Moreover, the large HTP temperature dependence could be maintained and even enhanced in the longer wavelength region by adjusting the content of the BCM. Finally, based on the large HTP temperature dependence and the positive affect on the host LC of the BCM, a thermally bandwidth-controllable reflective polariser that could work in the visible region (400-750 nm) was prepared from the N-LC/BCM/polymer network composite.
