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Response Time Characteristics and Holographic Gratings in an Azo-Dye Doped Photorefractive Polymeric Composite |
| WANG Feng;CHEN Zhi-jian;GONG Qi-huang;CHEN Yi-wang1;CHEN Hui-ying1 |
| Department of Physics, Mesoscopic Physics Laboratory, Peking University, Beijing 100871
1Department of Chemistry, Peking University, Beijing 100871 |
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| Cite this article: |
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WANG Feng, CHEN Zhi-jian, GONG Qi-huang et al 1998 Chin. Phys. Lett. 15 351-353 |
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Abstract Theoretical and experimental investigation on the applied electric field- and intensity-dependent photorefractive response in a photorefractive polymeric composite is presented. The decay time constant and the corresponding grating-amplitude for the composite consisting of 1-n-butoxy1-2,5-dimethy1-4-(4 ’- nitrophenylazo) benzene : poly(N-vinylcarbazole) : 2,4,7-trinitro-9-fluorenone with a weight ratio 44:55:1 were measured. The results revealed that there existed two gratings simultaneously, one was caused by the photorefractive effect, and the other was contributed from the photo-isomerization process. The dynamic process for the photorefractive grating was explained with a modified band transport model.
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| Keywords:
42.65.Hw
78.66.Qn
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Published: 01 May 1998
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| PACS: |
42.65.Hw
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(Phase conjugation; photorefractive and Kerr effects)
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78.66.Qn
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(Polymers; organic compounds)
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