Molecular Reorientation Mechanism of Gratings Structure in an Azobenzene Polymer (PGMAA-20) Film

doi:10.7517/j.issn.1674-0475.2004.03.183

Imaging Science and Photochemistry ›› 2004, Vol. 22 ›› Issue (3): 183-189.DOI: 10.7517/j.issn.1674-0475.2004.03.183

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Molecular Reorientation Mechanism of Gratings Structure in an Azobenzene Polymer (PGMAA-20) Film

NIU Yong-ping¹, ZHANG Ling-zhi¹, SU Yu-zhi¹, LIANG Zhao-xi¹, LU Wei², SHE Wei-long²

1. Institute of Polymer Science, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, Guangdong, P. R. China;
2. State Key Laboratory of Optoelectronic Materials and Tech nologies, Sun Yat-Sen Universisy, Guangzhou 510275, Guangdong, P.R.China

Received:2003-11-20 Revised:2004-01-05 Online:2004-05-23 Published:2004-05-23

Abstract

Abstract: An azobenzene polymer (PGMAA-20) was synthesized and characterized.Photoinduced refractive index gratings were written in the azobenzene polymer films by using S+S configuration.After the gratings formed,the samples were investigated under a polarized optical phase contrast microscope.It has been found that the gratings are polarization sensitive.This kind of gratings can be kept in the material for a long time.A mode of molecular reorientation is used to explain the formation mechanism of these gratings and it is well consistent with our experimental results.

Key words: azobenzene polymer, photoinduced isomerization, gratings structure, molecular reorientations

CLC Number:

NIU Yong-ping, ZHANG Ling-zhi, SU Yu-zhi, LIANG Zhao-xi, LU Wei, SHE Wei-long. Molecular Reorientation Mechanism of Gratings Structure in an Azobenzene Polymer (PGMAA-20) Film[J]. Imaging Science and Photochemistry, 2004, 22(3): 183-189.

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Molecular Reorientation Mechanism of Gratings Structure in an Azobenzene Polymer (PGMAA-20) Film

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