Chang Che-Wei, Huang Chi-Yen, Song Heng-Cheng
Graduate Institute of Photonics, National Changhua University of Education, Changhua, Taiwan.
Opt Express. 2011 Jul 4;19(14):13306-11. doi: 10.1364/OE.19.013306.
We demonstrate an initially twisted pi cell fabricated by doping silica nanoparticles into the conventional pi cell. With AC high voltage, the director distortion of the liquid crystals (LCs) near the substrate surface creates a lifting force, which moves the silica nanoparticles toward the substrate surfaces. The accumulated silica nanoparticles on the substrate surfaces stabilize the LCs at the twisted pi state when the AC high voltage is turned off. The formed twisted pi state is permanent. The operation voltage and the response time of the initially twisted pi cell are less than those of the conventional pi cell.
我们展示了一种通过将二氧化硅纳米颗粒掺杂到传统π型盒中制备的初始扭曲π型盒。在交流高压下，基板表面附近液晶（LC）的指向矢畸变产生一个提升力，该力将二氧化硅纳米颗粒移向基板表面。当交流高压关闭时，基板表面上积累的二氧化硅纳米颗粒将LC稳定在扭曲π态。形成的扭曲π态是永久性的。初始扭曲π型盒的工作电压和响应时间低于传统π型盒。
