| 不同生色团对聚合物薄膜全光开关效应的影响 |
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| 引用本文： | 罗锻斌,佘卫龙,吴水珠,汪海. 不同生色团对聚合物薄膜全光开关效应的影响[J]. 光学学报, 2004, 24(8): 073-1078 |
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| 作者姓名： | 罗锻斌 佘卫龙 吴水珠 汪海 |
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| 作者单位： | 中山大学光电材料与技术国家重点实验室,广州,510275;华南理工大学高分子材料科学与工程系,广州,510640 |
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| 基金项目： | 国家自然科学基金 (5 0 1730 0 7)，广东省科技计划项目(A10 6 0 2 0 1)，高校重点实验室访问学者基金资助课题 |
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| 摘 要： | 在聚甲基丙烯酸甲酯(PMMA)中掺人不同的偶氮染料并制成薄膜样品，以调制的线偏振Ar^ 激光(514nrn，CW)作为控制光，He-Ne激光(632．8nm，CW)为信号光，研究了样品的光致双折射效应及全光开关效应。通过对样品的响应特性和全光开关效应进行比较，发现电子推拉势较强的生色团分子在控制光作用下，可以产生较大的光致双折射效应，但光响应速度较慢，其光致双折射效应以光致异构取向为主要机制；而对于具有较弱电子推拉势的生色团分子，其光致双折射效应则主要来自光致异构烧孔机制，虽然其光致双折射效应小，但光响应速度快。
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| 关 键 词： | 非线性光学 全光开关效应 偶氮染料 光致异构 |
| 收稿时间： | 2003-01-20 |
Influence of Doping Different Azo Chromophores on the All-Optical Switching Effect of the Polymer Films |
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| Luo Duanbin She Weilong Wu Shuizhu Wang Hai State Key Laboratory of Optoelectronic Materials and Technol ogies,Sun Yat-sen University,Guangzhou. Influence of Doping Different Azo Chromophores on the All-Optical Switching Effect of the Polymer Films[J]. Acta Optica Sinica, 2004, 24(8): 073-1078 |
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| Authors: | Luo Duanbin She Weilong Wu Shuizhu Wang Hai State Key Laboratory of Optoelectronic Materials Technol ogies Sun Yat-sen University Guangzhou |
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| Affiliation: | Luo Duanbin1 She Weilong1 Wu Shuizhu2 Wang Hai2 1 State Key Laboratory of Optoelectronic Materials and Technol ogies,Sun Yat-sen University,Guangzhou 510275 2 Department of Polymer Science and Engineering,South China University of Technology,Guangzhou 510640 |
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| Abstract: | Different samples were prepared by doping azo dy e 4'-[[2-(acryloyloxy) ethyl] ethylamino]-4-nitroazobenzene (DR1), 4'- [[2-(acryloyloxy) ethyl] ethylamino]-2-chloro-4-nitroazobenzene (DR13) and 4'-[2-2-(acryloyloxy) ethyl]-4-nitroazobenzene (DR19) in poly (methyl methacrylate) (PMMA) polymer films. The optical switching effects of the compos ites were measured by using linearly polarized 514 nm pump beam from an Ar+ la ser (514 nm,CW) and a linearly polarized probe beam from a He-Ne laser (632.8 n m, CW). It was found that the sample containing the chromophores with strong pul l/push electronic potential showed larger birefringence but slow response, which mainly came from the photoinduced reorientation process of the chromophores. The sample containing the chromophores with weak pull/push electronic potential showed small birefringence but fast response, which was attributed to the faster angular hole burning process of the chromophores. |
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| Keywords: | nonlinear optics all-optical switching effect a zo dye photoisomerization |
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