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| 胆甾型液晶溶液膜中的随机激光 | |
| 引用本文： | 何本桥,廖青,黄勇.胆甾型液晶溶液膜中的随机激光[J].中国激光,2008,35(10):1477-1480. |
| 作者姓名： | 何本桥 廖青 黄勇 |
| 作者单位： | 1. 天津工业大学材料与化工学院,纤维改性与功能纤维天津市重点实验室,天津,300160 2. 中国科学院化学研究所,分子动态与稳态结构国家重点实验室,北京,100080 3. 中国科学院化学研究所高,分子物理与化学国家重点实验室,北京,100080 |
| 摘 要： | 研究了激光染料若丹明6G(R6G)在乙基氰乙基纤维素(E-CE)C]/丙烯酸(AA)胆甾型液晶溶液中的随机激光行为.发现在没有添加任何固体散射粒子的情况下,在(E.CE)C/AA/R6G溶液中观察到多个分离激光峰,最小半峰全宽(FWHM)为0.3 nm,表现出相干反馈行为.这种相干反馈激光行为的形成可能与液晶溶液中胆甾型微区的选择性反射和其折光指数各向异性密切相关. |
| 关 键 词： | 激光技术 胆甾型液晶聚合物 光散射 随机激光 若丹明6G |
| 收稿时间： | 2008/1/15 |
Random Lasing in a Cholesteric Liquid Crystal Polymer Solution |
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| He Benqiao,Liao Qing,Huang Yong.Random Lasing in a Cholesteric Liquid Crystal Polymer Solution[J].Chinese Journal of Lasers,2008,35(10):1477-1480. | |
| Authors: | He Benqiao Liao Qing Huang Yong |
| Abstract: | Random lasing action of rhodamine 6G (R6G) in ethyl-cryanoethyl cellulose (E-CE)C]/acrylic acid (AA) cholesteric liquid crystal (LC) solution without doping fine powder was firstly studied. It is found that random laser with coherent feedback occurrs in the LC solutions, while only narrowing spectra phenomenon was observed in isotropic (E-CE)C/AA solution and AA solvent. And the narrowest full-wavelength at half-maximum (FWHM) of laser peak is 0.3 nm. The laser threshold changes from 27 μJ to 20 μJ when the concentration of (E-CE)C/AA solution varies from 35% to 46.5%. This random laser with coherent feedback is related to the multiple scattering resulting from the selected reflection and low diffusion constant in LC solution. |
| Keywords: | laser technique cholesteric liquid crystal polymer optical scattering random laser rhodamine 6G |
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