| 激光诱导液晶定向研究 |
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| 引用本文： | 蔡邦维,何玉萼,秘国江,王占奇,肖俊,杨春林. 激光诱导液晶定向研究[J]. 中国激光, 1999, 26(3): 239-242 |
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| 作者姓名： | 蔡邦维 何玉萼 秘国江 王占奇 肖俊 杨春林 |
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| 作者单位： | 四川大学激光物理与化学研究所，四川大学化学系 |
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| 摘 要： | 报道了一种新的激光诱导液晶定向技术。用偏振激光辐照两块涂有聚乙烯醇（ＰＶＡ）和甲基橙（ＭＯ）混合物薄膜的玻璃基片，再按激发光偏振态相互垂直的方向组装为液晶（ＬＣ）盒，用光诱导法获得盒内液晶分子的扭曲向列排列，该盒可使入射线偏振光旋转９０°。用１ＧＷ／ｃｍ２强激光辐照后，盒内ＬＣ分子取向不变，因而可望用于制备强激光系统中偏光控制器以改善光束质量。
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| 关 键 词： | 液晶，激光诱导定向，偏光控制器，强激光 |
| 收稿时间： | 1997-10-27 |
Studies of Laser Photoinduced Alignment of Liquid Crystals |
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| Abstract: | A new alignment technology was proposed here. Substrates coated with polyvinyl alcohol (PVA) and methyl orange (MO) layer were illuminated by a linearly polarized laser for certain time. Subsequently, a liquid crystal (LC) cell was assembled with the polarized direction of the illuminating light of both substrates mutually perpendicular, from which a twist nematic (TN) alignment of LC molecules has been got. When a beam of linearly polarized light transmits through the LC cell, the polarization direction will rotate 90°. After the laser illumination, the twist nematic structure of the LC cell keeps unchanged after a number of shots of high power laser pulses. |
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| Keywords: | liquid crystals photoinduced alignment polarization controller high power laser |
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