通过实验研究了C60掺杂的向列相液晶(5CB)在低光强下的自相位调制现象.样品经过二波耦合实验之后液晶分子进行一定的取向,这时在水平和竖直偏振光的照射下可观察到明显的自相位调制现象.改变入射光的偏振方向可以看到自相位调制的衍射图样也随之改变,原因就是液晶折射率变化的各向异性.可见,液晶盒中的分子取向与光束的偏振方向有很强的依赖关系.
参考文献
| [1] | Wiederrcht G P.Photorefractive liquid crystal[J].Annu.Rev.Mater.Res.,2001,31:139-169. |
| [2] | Khoo I C.Liquid Crystal:Physical Properties and Nonlinear Optical Phenomena[M].NY:Wiley Interscience,1994. |
| [3] | 胡立发.用平行向列液晶空间光调制作相息图的研究[J].液晶与显示,2005,20(2):93-98. |
| [4] | Marrucci Lorenzo.Mechanisms of giant optical nonlinearity in light-absorbing liquid crystals:a brief primer[J].Liquid Crystal Today,2002,11(3):1-28. |
| [5] | Rudenko E V,Sukhov A V.Optically induced spatial charge separation in a nematic and resultant orientational nonlinearity[J].JETP,1994,78(6):875-882. |
| [6] | Khoo I C,Li H,Liang Y.Observation of orientational photorefractive effects in nematic liquid crystals[J].Opt.Lett.,1994,19(21):1723-1725. |
| [7] | Khoo I C,Zhuang S L.Nonlinear optical amplification in a nematic liquid crystal above the Freederiks transition[J].Appl.Phys.Lett.,1980,37(1):3-4. |
| [8] | Hiroshi Ono,Nobuhiro Kawatsuki.Self-phase modulation induced by a He-Ne laser in host-guest liquid crystals with different nematic-isotropic transition temperatures[J].Jpn.J.Appl.Phys.,1997,36(3B):353-356. |
| [9] | Hiroshi Ono,Yoshiro Harato.Characterization of laser-induced self-phase modulation in host-guest liquid crystals[J].Jpn.J.Appl.Phys.,1998,37(7):4061-4065. |
| [10] | Brugioni S,Meucci R.Self-phase modulation in a nematic liquid crystal film induced by a low-power CO2 laser[J].Optics Communications,2002,206:445-451. |
| [11] | 李伯符.液晶物理--电场对液晶的作用与液晶的光学性质[J].液晶与显示,2001,16(3):228-239. |
| [12] | Khoo I C.Orientational photorefractive effects in nematic liquid crystal films[J].IEEE J.Quantum Electronics (USA),1996,32(3):525-534. |
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