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Lightwave manipulation by organic nonlinear optical materials

有机非线性光学材料的光波操纵

基本信息

批准号：
07246104
负责人：
MIYATA Seizo
金额：
$ 37.63万
依托单位：
Tokyo University of Agriculture and Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas
财政年份：
1998
资助国家：
日本
起止时间：
1998 至无数据
项目状态：
已结题

项目摘要

As current communication systems are becoming more powerful and complex, optical technology is expected to contribute significantly to the future electronic information processing network. The objective of this research is to develop light manipulation devices such as frequency manipulation device, phase and intensity manipulation device and wavefront manipulation device.In this project, wide variety of second-order NLO materials, photorefractive materials, optical waveguide and polymer optical fibers, and novel materials consisting of chiral group were developed. Organic ionic salts possess large optical nonlinearity with relatively low cut off wavelength. Nano particles of organic crystal are prepared with negative charge and χィイD1(3)ィエD1 of nanocrystals found to be 10ィイD1-7ィエD1 esu. Efficient phase and intensity manipulation device were prepared by crystal cored fiber. In addition novel optical modulators based on chiral nonlinearity were developed. The very stable NLO polymers consisting of α-helix polypeptide were synthesized and a sub-micron χィイD1(2)ィエD1 grating structure was fabricated by self-assembly technique to achieve high conversion efficiency and high bandwidth modulation.We have developed multifunctional chromophores which enables us to obtain "monolithic photorefractive materials" The efficient photorefractive effects allow us to demonstrate imagereconstruction and optical associative memory. Optical space modulator was fabricated by using poled polymer photonic crystal.The sensitivity of this space modulation and response time were improved more than 10 times by coupling with cavity structure.

随着当前通信系统变得越来越强大和复杂，光学技术有望对未来的电子信息处理网络做出重大贡献。本研究的目标是发展光操控器件，如频率操控器件、相位和强度操控器件、波前操控器件等，在本项目中，开发了各种二阶非线性光学材料、光折变材料、光波导和聚合物光纤，以及含有手性基团的新型材料。有机离子盐具有很大的光学非线性，截止波长较低。制备了带负电荷的有机晶体纳米颗粒，发现纳米晶体的χ π D1（3）π D1为10 π D1-7 π D1 esu。利用晶芯光纤制备了高效的相位和强度调控装置。此外，还开发了基于手征非线性的新型光调制器。我们合成了由α-螺旋多肽组成的稳定的非线性光学聚合物，并利用自组装技术制备了亚微米级的χ-π-D1（2）-π-D1光栅结构，实现了高转换效率和高带宽的调制，开发了多功能生色团，使我们能够获得“单片光折变材料”，有效的光折变效应使我们能够展示图像重建和光学联想记忆。利用极化聚合物光子晶体制作了空间光调制器，通过与腔结构的耦合，使空间光调制的灵敏度和响应时间提高了10倍以上。