摘要
取向Kerr效应对液晶光控取向质量的影响*王淑梅a)梁兆颜闫石谢景力b)田颜清b)黄锡民a)(中国科学院激发态物理开放研究实验室,长春130021)(中国科学院长春物理研究所,长春130021)b)(吉林大学化学系,长春130023)关键词取向Ker...
?The influence of orientational Kerr effect on photoinduced alignmetnt of liquid crystals was studied at different intensities of linearly polarized 355nm laser pulse and viscosities of the photoprepolymer layers. The coumarin photoprepolymer materials(LPP2) which was used to make linear photopolymerization(LPP) layers has large thirdorder nonlinearity at 355nm laser pulses with 250ps(FWHM) duration. Its nonlinear refractive index was n2=-237×10-9 esu. The major origin of its thirdorder nonlinearity is orientational Kerr effect. The polarized microscopic photographs of liquid crystals cells obtained at different irradiation intensities and viscosities certainly exhibit that orientational Kerr effect increases the probability of linear photopolymerization in the linear polarized direction and improves the quality of photoinduced alignment of liquid crystals.
出处
《发光学报》
EI
CAS
CSCD
北大核心
1998年第2期189-192,共4页
Chinese Journal of Luminescence
基金
中国科学院激发态物理开放实验室资助
关键词
取向克尔效应
液晶
光控取向
光学非线性
orientational Kerr effect, liquid crystals, linear photopolymerization (LPP), photoinduced alignment, thirdorder nonlinearity