| Influence of intensity on the steady and transient state space—charge fields in photorefractive polymers |
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| 引用本文： | 袁保红,孙秀冬,姜永远,周忠祥,姚凤凤,李焱.Influence of intensity on the steady and transient state space—charge fields in photorefractive polymers[J].中国物理 B,2002,11(1):21-29. |
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| 作者姓名： | 袁保红 孙秀冬 姜永远 周忠祥 姚凤凤 李焱 |
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| 作者单位： | Department of Applied Physics, Harbin Institute of Technology, Harbin 150001, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No. 69878006), and the Foundation of Harbin Institute of Technology, China (Grant No. 991190-014). |
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| 摘 要： | We have proven theoretically that there are sublinear,linear and superlinear relations between the response rates and total incident intensity for different cases of traps in photorefractive polymer materials.These relations were observed in inorganic photorefractive crystals many years ago.Also,the steady-state space-charge field is a function of the total incident intensity,which has also been found in inorganic photorefractive crystals.We have measured the relations of the steady-state diffraction efficiency and the response rate with respect to the total incident intensity in the photorefractive composite consisting of the polymer (N-vinylcarbazole) (PVK) doped with 4,4‘-n-pentylcyanobiphenyl (5CB) and C60.The results obtained show that the composite belongs to the case of low trap density.
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| 关 键 词： | 光折射聚合物 空间电荷场 响应速率 |
| 收稿时间： | 3/8/2001 12:00:00 AM |
Influence of intensity on the steady and transient state space-charge fields in photorefractive polymers |
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| Yuan Bao-Hong,Sun Xiu-Dong,Jiang Yong-Yuan,Zhou Zhong-Xiang,Yao Feng-Feng and Li Yan.Influence of intensity on the steady and transient state space-charge fields in photorefractive polymers[J].Chinese Physics B,2002,11(1):21-29. |
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| Authors: | Yuan Bao-Hong Sun Xiu-Dong Jiang Yong-Yuan Zhou Zhong-Xiang Yao Feng-Feng and Li Yan |
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| Institution: | Department of Applied Physics, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | We have proven theoretically that there are sublinear, linear and superlinear relations between the response rates and total incident intensity for different cases of traps in photorefractive polymer materials. These relations were observed in inorganic photorefractive crystals many years ago. Also, the steady-state space-charge field is a function of the total incident intensity, which has also been found in inorganic photorefractive crystals. We have measured the relations of the steady-state diffraction efficiency and the response rate with respect to the total incident intensity in the photorefractive composite consisting of the polymer (N-vinylcarbazole) (PVK) doped with 4,4'-n-pentylcyanobiphenyl (5CB) and C60. The results obtained show that the composite belongs to the case of low trap density. |
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| Keywords: | photorefractive polymer space-charge field response rate |
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