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| C60掺杂垂直排列向列相液晶中光束脉冲现象的研究 | |
| 引用本文： | 韩仁学,任常愚,孙飞. C60掺杂垂直排列向列相液晶中光束脉冲现象的研究[J]. 液晶与显示, 2006, 21(3): 197-200 |
| 作者姓名： | 韩仁学 任常愚 孙飞 |
| 作者单位： | 1. 黑龙江科技学院,数力系,黑龙江,哈尔滨,150027;中国科学院,西安光学精密机械研究所,陕西,西安,710000 2. 黑龙江科技学院,数力系,黑龙江,哈尔滨,150027;哈尔滨工业大学,物理系,黑龙江,哈尔滨,150001 3. 黑龙江科技学院,数力系,黑龙江,哈尔滨,150027 |
| 基金项目： | 黑龙江省教育厅科学技术研究资助项目(No.10551273) |
| 摘 要： | 利用二波耦合实验研究了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,实验发现没有相干光预照与有相干光预照的样品的衍射信号表现出不同的脉冲现象。折射率光栅瞬间增强产生的脉冲要比折射率光栅瞬间减弱时产生的脉冲显著得多。为了解释实验中观察到的这种现象,给出了液晶分子取向力矩平衡方程。 |
| 关 键 词： | 向列相液晶 二波耦合 脉冲现象 |
| 文章编号： | 1007-2780(2006)03-0197-04 |
| 修稿时间： | 2005-10-27 |
Pulsation Features of the Beam in C60-doped Homeotropically Aligned Nematic Liquid Crystals |
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| HAN Ren-xue,REN Chang-yu,SUN Fei. Pulsation Features of the Beam in C60-doped Homeotropically Aligned Nematic Liquid Crystals[J]. Chinese Journal of Liquid Crystals and Displays, 2006, 21(3): 197-200 | |
| Authors: | HAN Ren-xue REN Chang-yu SUN Fei |
| Abstract: | Pulsation features of the diffraction beam in the phase-shifted refractive index grating under electric field was studied in C_(60)-doped nematic liquid crystal by two-beam coupling experiment. Different pulsation features for pre-irradiation and non pre-irradiation sample were observed in experiment. When the refractive index grating was enhanced,the pulsation was sharper than when the grating was weaken. In order to investigate these distinct properties, a molecular equilibrium equation of torques and a director distribution model were presented. By means of the equation and scheme of molecular reorientation, the pulsation features of the diffraction beam were illustrated qualitatively. |
| Keywords: | nematic liquid crystal two-beam coupling pulsation features |
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