| All-Optical Photorefractive Effect in Carbazole-Based Azo-Side Group Polymer |
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| 作者姓名： | 黄毛毛 陈志坚 石军 曹少魁 龚旗煌 |
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| 作者单位： | [1]School of Physics, State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871 [2]College of Materials Engineering, Zhengzhou University, Zhengzhou 450052 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 60407004, 10521002, 10434020, 60378012, 90206003, 10328407 and 90101027, the National Key Basic Research Special Foundation （NKBRSF） of China under Grant No TG1999075207. |
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| 摘 要： |
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| 关 键 词： | 全光折射效应 群聚合体 零偏置电压 增益系数 光致径向电场 |
| 收稿时间： | 2006-12-06 |
| 修稿时间： | 2006-12-06 |
All-Optical Photorefractive Effect in Carbazole-Based Azo-Side Group Polymer |
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| HUANG Mao-Mao, CHEN Zhi-Jian, SHI Jun, CAO Shao-Kui, GONG Qi- H uang.All-Optical Photorefractive Effect in Carbazole-Based Azo-Side Group Polymer[J].Chinese Physics Letters,2006,23(9):2468-2471. |
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| Authors: | HUANG Mao-Mao CHEN Zhi-Jian SHI Jun CAO Shao-Kui GONG Qi- H uang |
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| Affiliation: | 1.School of Physics, State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871; 2. College of Materials Engineering, Zhengzhou University, Zhengzhou 450052 |
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| Abstract: | We observe the photorefractivity without bias voltage or prepoling in a bifunctional photorefractive polymer. The maximum two-beam coupling gain is measured to be 126cm^-1 at zero bias voltage. The sample is considered to be poled by the photoinduced longitudinal electric field, which is formed due to the light intensity gradient along the light path. The expression of the electric field was deduced. The energy transfer direction between two writing beams and light intensity dependence of the two-beam coupling gain coefficient is predicted to be consistent with the experimental results. Furthermore, the dependence of the two-beam coupling gain coefficient on external applied electrical field is measured and this experiment verifies the existence of the photoinduced longitudinal electric field. |
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