摘要
We demonstrate polarization-independent holographic gratings (PIHGs) based on azo-dye-doped polymer-dispersed liquid crystal films. The PIHGs are recorded by irradiation under an intensity-modulated interference field, generated by two linearly polarized green optical beams, and by simultaneously applying a suitable AC voltage to the sample. The photoexcited azo dyes are adsorbed onto the UV-cured polymer film with their long axes parallel to the normal of the substrate. When the applied voltage is switched off, the PIHGs are generated with periodic modulation of liquid-crystal structures with transparently homeotropic and randomly scattered alignments. Additionally, the generated PIHGs can be completely switched off by an applied voltage.
原文 | ???core.languages.en_GB??? |
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頁(從 - 到) | 275-280 |
頁數 | 6 |
期刊 | Applied Optics |
卷 | 49 |
發行號 | 2 |
DOIs | |
出版狀態 | 已出版 - 10 1月 2010 |