向列相液晶中衍射光束脉冲现象的研究  

Studies of pulsation feature of the diffraction beam in a nematic liquid crystals

作　　者：韩仁学[1] 任常愚[2] 孙飞[2] 

机构地区：[1]中国科学院西安光学精密机械研究所,陕西西安71000 [2]黑龙江科技学院数力系

出　　处：《黑龙江大学自然科学学报》2006年第1期68-71,共4页Journal of Natural Science of Heilongjiang University

基　　金：黑龙江省教育厅科学技术研究资助项目(10551273)

摘　　要：利用双光束耦合实验研究了C60掺杂垂直排列向列相液晶(5CB)中全息光栅衍射信号的脉冲现象,实验上发现没有相干光预照与没有相干光预照的样品的衍射信号表现出不同的脉冲现象。给出了液晶分子取向力矩平衡方程从理论上解释了这种现象。Pulsation feature of the diffraction beam in the field was studied in C60 -doped nematic liquid crystal by phase -shifted refractive index grating under an electric two -beam coupling experiment. Different Pulsation feature for pre - irradiation and non pre - irradiation sample were observed in experiment. In order to investigate these distinct properties, a molecular equilibrium equation of torques and a director distribution model was presented. By means of the equation and scheme of molecular reorientation, the pulsation feature of the diffraction beam was illustrated qualitatively.

关 键 词：向列相液晶 双光束耦合 脉冲现象 

分 类 号：O753.2[理学—晶体学]