Temperature and orientation dependence of surface relief gratings based on dye-doped polymer film with the interface of nematic liquid crystals
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- 作者：Shuan-Yu Huang ; Bing-Yau Huang ; Wen-Chi Hung ; Kai-Yu Yu ; Wen-Shou Cheng ; Chie-Tong Kuo
- 关键词：Surface relief grating ; Dye-doped polymer film ; Nematic liquid crystal ; First-order diffraction
- 刊名：Optics Communications
- 出版年：2011
- 出版时间：15 February 2011
- 年：2011
- 卷：284
- 期：4
- 页码：934-937
- 全文大小：312 K
文摘
The formation of surface relief grating on dye-doped polymer film with the interface of nematic liquid crystals has been investigated by means of the holographic technique. The first-order diffraction efficiency of surface relief grating depends on the temperature and the orientation of molecular director in the interface of nematic liquid crystals. The diffraction efficiency is roughly independent of thermal fluctuations of molecular director in the most part of nematic temperature range and apparently drops near the transition temperature. The morphology of surface relief grating demonstrates that the surface modulation is larger for molecular director parallel to the groove direction. The experimental result also shows that the first-order diffraction efficiency is dependent on the surface modulation of surface relief grating.