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Proceedings Paper

Full functional photorefractive molecule with large two-beam coupling gain
Author(s): Maomao Huang; Zhijian Chen; Jun Shi; Jie Zhang; Shaokui Cao; Qihuang Gong
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Paper Abstract

We have synthesized two Carbazole-based monolithic monomers, 3-[9-(2-Ethyl-hexyl)-9H-carbazol-3-yl]-2-(4-nitro- phenyl)-acrylonitrile (M1) and (Z)-2-((9-(4-ethylhexyl)-9H-carbazol-6-yl)methylene)-4-oxopentanenitrile (M2), which contain both photoconductive and electro-optic chromophore. The melting point were measured to be 151 oC (M1) and 77 oC(M2) respectively, which are higher than the room temperature. No crystallization of their films is observed at room temperature. One of the monomers M1 exhibits good photorefractive performance. The two-beam coupling gain coefficient of M1 is measured to be 372 cm-1 at 50 V/um, while the two-beam coupling gain coefficient of M2 is only 17 cm-1 at 42 V/um. By applying ellipsometric technique, we deduced that the better PR performance of M1 was due that M1 has larger effective electro-optic coefficient. The photorefractive index modulation of M1 was measured to be 6x10-3 at an electric field of 48.3V/μm. Further investigation on the structure-property relationship has also been demonstrated.

Paper Details

Date Published: 28 January 2005
PDF: 9 pages
Proc. SPIE 5646, Nonlinear Optical Phenomena and Applications, (28 January 2005); doi: 10.1117/12.575898
Show Author Affiliations
Maomao Huang, Peking Univ. (China)
Zhijian Chen, Peking Univ. (China)
Jun Shi, Zhengzhou Univ. (China)
Jie Zhang, Peking Univ. (China)
Shaokui Cao, Zhengzhou Univ. (China)
Qihuang Gong, Peking Univ. (China)

Published in SPIE Proceedings Vol. 5646:
Nonlinear Optical Phenomena and Applications
Qihuang Gong; Yiping Cui; Roger A. Lessard, Editor(s)

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