Photorefractive effect of photoconductive ferroelectric liquid crystalline mixtures composed of photoconductive chiral compounds and liquid crystal
作者:Takeo Sasaki、Daisuke Miyazaki、Komei Akaike、Masashi Ikegami、Yumiko Naka
DOI:10.1039/c1jm10405e
日期:——
The photorefractive effect in photoconductive ferroelectric liquid crystals (FLCs) that contain photoconductive chiral compounds was investigated. A series of novel photoconductive chiral compounds were synthesized. Terthiophene compounds with four chiral structures were chosen as the photoconductive chiral compounds and mixed with an achiral smectic C liquid crystal. The mixtures exhibit the ferroelectric chiral smectic C phase. The photorefractivity of the mixtures was investigated by two-beam coupling experiments. It was found that the FLCs containing the photoconductive chiral compound exhibit a large gain coefficient of 110 cm−1 and a fast response time of 5 ms.
这项研究调查了含有光导性手性化合物的光导性铁电液晶(FLCs)的光折变效应。研究人员合成了一系列新型光导性手性化合物。选择了具有四种手性结构的三联噻吩化合物作为光导性手性化合物,并将其与非手性向列相C液晶混合。这些混合物呈现铁电手性向列相C相。通过双光束耦合实验研究了混合物的光折变性。研究发现,含有光导性手性化合物的FLCs表现出110 cm⁻¹的大增益系数和5毫秒的快速响应时间。