Polarization-independent holographic gratings based on azo-dye-doped polymer-dispersedliquid-crystal films

Andy Ying Guey Fuh, Che Chang Chen, Ko Ting Cheng, Cheng Kai Liu, Wei Ko Chen

研究成果: 雜誌貢獻期刊論文同行評審

4 引文 斯高帕斯(Scopus)

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???
頁(從 - 到)275-280
頁數6
期刊Applied Optics
49
發行號2
DOIs
出版狀態已出版 - 10 1月 2010

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