期刊
THIN SOLID FILMS
卷 516, 期 12, 页码 4178-4183出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2007.11.006
关键词
liquid crystal; photoreaction; hologram; grating; polarization
We present the results from some experimental and theoretical studies aimed at revealing the mechanism leading to the diffraction properties of two-dimensional cross polarization gratings in photocrosslinkable polymer liquid crystals. Although the polarization gratings are overwritten at the same place, each polarization gating works independently in our material system. The above-mentioned characteristic of our cross polarization gratings originates in the grating formation mechanism in the photocrosslinkable polymer liquid crystals, in which the molecules in the solid-state polymeric materials are not reoriented during exposure and reorientation is generated during the annealing process after multiple exposure. (C) 2007 Elsevier B.V All rights reserved.
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