Nano-level light-electdc-field control of reorientation of liquid crystalline molecules and its applications to optical information processing

纳米级光电场控制液晶分子取向及其在光信息处理中的应用

• 批准号: 14550036
• 负责人: ONO Hiroshi
• 金额: $ 2.24万
• 依托单位: Nagaoka University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550036/
• 关键词: Liquid crystal; Polymer; Hologram; Grating device; Fourier transform; Image processing; Polarization; Photocroaslink; 回折; フォトリフラクティ; フーリエ変換光学系

A control of a molecular orientation of polymer materials is of great interest for an optical storage, highly functionalized optical device, birefringent film etc. By the use of a linearly polarized light and interference light, refractive index change is induced in liquid crystalline media. In this study, the alignment of liquid crystalline molecules has been photo-controlled and the micron-and nano-size patterns have been generated. The principle of the research results are summarized as followed.(1)Spatial-selective reconstruction in photorefractive liquid crystal composites by means of real-time holographic technique.(2)Image inversion in dye-doped liquid crystals by means of nonlinear Fourier transformation optical system.(3)Highly efficient photorefractive effects in photorefractive liquid crystal/polymer composites.(4)All-optical focal length converter generated in dye-doped liquid crystals.(5)Polarization holographic gratings in photo-cross-linkable polymer liquid crystals and polarization conversion in the gratings.These results suggest that the light-control of the molecular reorientation is very useful for the photonics applications.

控制聚合物材料的分子取向对于光存储、高度功能化的光学器件、双折射膜等具有极大的意义。通过使用线偏振光和干涉光，在液晶介质中诱导折射率变化。在这项研究中，液晶分子的排列被光控制并产生了微米和纳米尺寸的图案。研究成果的原理概括如下。（1）利用实时全息技术实现光折变液晶复合材料的空间选择性再现。（2）利用非线性傅里叶变换光学系统实现染料掺杂液晶的图像反转。（3）光折变液晶/聚合物复合材料的高效光折变效应。（4）在染料掺杂液晶中产生的全光学焦距转换器。（5）光致交联聚合物液晶中的偏振全息光栅和光栅中的偏振转换，这些结果表明，光控制分子的再取向在光子学应用中是非常有用的。

项目成果

H.Ono, A.Emoto, N.Kawatsuki, T.Hasegawa: "Self-organized phase gratings in photoreactive polymer liquid crystals."Applied Physics Letters. 82. 1359-1361 (2003)

H.Ono、A.Emoto、N.Kawatsuki、T.Hasekawa：“光反应性聚合物液晶中的自组织相位光栅。”应用物理快报。

A.Emoto, H.Ono, N.Kawatsuki: "Photorefractive mesogenic composites for optical image processing"Proceedings of SPIE 45rd Annual Meeting at Seatle. 4802. 76-84 (2002)

A.Emoto、H.Ono、N.Kawatsuki：“用于光学图像处理的光折变介晶复合材料”西雅图 SPIE 第 45 届年会论文集。

A.Emoto, H.Ono, N.Kawatsuki: "Spatial frequency selective reconstruction using Fourier transform holograms generated in functionalized mesogenic composites"Liq.Cryst.. 30. 1201-1206 (2003)

A.Emoto、H.Ono、N.Kawatsuki：“使用功能化介晶复合材料中生成的傅里叶变换全息图进行空间频率选择性重建”Liq.Cryst.. 30. 1201-1206 (2003)

H.Ono: "Detailed characteristics of photothermal index change in guest-host liquid crystals"J. Nonlinear Opt. Phys. Mater.. 11. 219-237 (2002)

H.Ono：“宾主液晶光热指数变化的详细特征”J。

H.Ono, H.Shimokawa, A.Emoto, N.Kawatsuki: "Effects of droplet size on photorefractive properties of polymer dispersed liquid crystals"Polymer. 44. 7971-7978 (2003)

H.Ono、H.Shimokawa、A.Emoto、N.Kawatsuki：“液滴尺寸对聚合物分散液晶的光折变性能的影响”聚合物。