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Proceedings Paper

Effect of heat on photoinduced birefringence in azobenzene-side-chain copolymer
Author(s): Jun Yang; Bin Guo; Bo Chen; Jiangying Zhang; Pei Wang; Hai Ming; Qijin Zhang
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Paper Abstract

Azobenzene polymers show large optical anisotropy, and one can control the optical anisotropy by changing the alignment of the molecules with light. Azo groups fall perpendicularly to the direction of the electric field vector of the linear polarized light by photoisomerization. This reorientation induces anisotropy and the difference of refractive index parallel and perpendicular to the irradiating laser polarization direction. In this paper, the photoinduced birefringence induced with 532 nm light in films of azobenzene polymer has been studied as a function of temperature, light intensity. From the evolution of the birefringence induced by laser, the temperature effects on photochemical trans-cis-trans isomerization cycles have been probed and analyzed. The effect of laser-induced heating has been introduced to the buildup of photoinduced birefringence in azobenzene-side-chain copolymer. The curves for the buildup of birefringence were fitted with a modified function, namely, biexponential curves and Gaussian curves. The relationship of each parameter has been also presented. With the modified fitting function, we obtained better fitting result.

Paper Details

Date Published: 17 January 2005
PDF: 7 pages
Proc. SPIE 5644, Optoelectronic Devices and Integration, (17 January 2005); doi: 10.1117/12.572367
Show Author Affiliations
Jun Yang, Univ. of Science and Technology of China (China)
Bin Guo, Univ. of Science and Technology of China (China)
Bo Chen, Univ. of Science and Technology of China (China)
Jiangying Zhang, Univ. of Science and Technology of China (China)
Pei Wang, Univ. of Science and Technology of China (China)
Hai Ming, Univ. of Science and Technology of China (China)
Qijin Zhang, Univ. of Science and Technology of China (China)

Published in SPIE Proceedings Vol. 5644:
Optoelectronic Devices and Integration
Hai Ming; Xuping Zhang; Maggie Yihong Chen, Editor(s)

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