液晶中一种稳定的相态:蓝相

A stable phase state of liquid crystals: the blue phase

文章描述了胆甾相液晶中蓝相的研究现况 .蓝相 (BP)是液晶中具有特殊性质的一个相态 ,它的序参量表现出三维空间周期性 .蓝相是出现在一个狭小的温度间隔里 (量级为 0 .1— 1K)的稳定相态 .文章对已观察到的BPⅠ ,BPⅡ ,BPⅢ (“雾”相 )的性质做了简要的叙述 .对研究液晶蓝相的主要理论———Ginzburg -Landau理论 (唯象理论 )作了介绍 。

An overview is given of the present status of research on the blue phase of cholesteric liquid crystals. This blue phase has unusual properties with an order parameter exhibiting three\|dimensional spatial periodicity, and is a stable phase state which appears in a narrow temperature interval (of the order of 0.1-1K). We describe briefly the properties of the BPⅠ, BPⅡ and BPⅢ phases ('fog state') which have been observed by many researchers. We introduce the main (phenomenological) theory of the blue phase-- the Ginzburg\|Landau theory , and point out its practical physical significance.