文献类型：学位论文

中文题名：偶氮光敏材料的光学性质及潜在应用

英文题名：Optical Properties and Potential Applications of Azo Photosensitive Materials

作者：范圣法[1];

机构：[1]华东理工大学;

导师：罗锻斌;华东理工大学

授予学位：硕士

语种：中文

中文关键词：偶氮聚合物;非线性光学性质;光致异构;光致双折射;光开关

外文关键词：azo polymers; nonlinear optical properties; photoisomerization; photo-induced birefringence; photo-switches

摘要：在本文中,我们系统地介绍了偶氮聚合物的光学性质/(主要是非线性光学性质/)及潜在应用。非线性光学是在激光问世以后飞速发展,成为光学中的重要分支之一,从技术领域到研究领域,非线性光学的应用越来越广泛。偶氮染料聚合物在光开关、光限幅、光电通讯、光存储等方面都有很广泛的应用。 本文前一部分是偶氮染料类有机聚合物材料的非线性光学性质及应用的简述。主要包括光致双折射、光致异构、光致二向色性、光致分子团运动及材料表面栅结构和偶氮类聚合物的旋光效应。应用着重介绍了偶氮聚合物材料的光存储、全光开关的原理及发展现状。 后面一部分分为三个实验,分别探讨了：1、偶氮苯光敏材料中的光诱导非线性光学效应。本实验就是利用Z-Scan技术探讨了掺杂偶氮苯的聚合物薄膜由于光致各向异性导致的非线性折射率改变。2、偶氮苯材料中的光诱导波导及导波实验。本实验中我们就通过非相干光引起光致分子方向改变在掺杂分散红13的PMMA薄膜中发现了暗空间光孤子,并且第一次实现了非相干光空间暗孤子诱导出光波导,对光敏偶氮苯材料不敏感的白光进行导光,并且获得了较好的效果。3、偶氮类染料的光致双折射效应在光衰减方面的应用研究。在这个实验中我们探讨了掺杂分散红13的PMMA聚合物材料的光致双折射效应,并且用两种方法实现了对632.8nm探测光透过率的调节。一种是样品吸收泵光束能量而引起热效应,当改变泵浦光能量时可对探测光的透过率进行调谐,我们称之为光控可调节光衰减效应或全光调谐；另一种是在泵光束能量一定的情况下,直接控制样品的温度,当改变样品的温度时可对探测光的透过率进行调谐,我们称之为温控可调谐光衰减效应。
In this thesis, we introduce the optical properties'of azo polymers /(mainly the nonlinear optical properties/),and potential applications. Nonlinear optics developed fastly after the advent of laser as an important branch of optics. The potential application of azo-dye is widely ranged, including:optical storage、optical communication、optical limiting、optical switches and so on. In the first half of the thesis, we simply introduced the nonlinear optical properties and application of organic polymers such as azo-dye containing materials, including: photo-induced birefringence、photoisomerizatio、photo-induced dichronic、photo-induced mass motion and surface gratings and optical activity effect. The applications focus on the development and principle of optical data storage and all-optical switching. Then, the left part of the thesis can be divided into three experiments. Experimental material is zao-dye Disperse Red 13 doped poly/(methyl methacrylate/)polymeric film. The first experiment:Nonlinear refraction in photo-induced anisotropic states of azo-dye containing materials. In this present experiment, the nonlinear refraction in photo-induced anisotropic states of azo-dye doped polymeric films is investigated. The second experiment: Incoherent dark spatial solitons and guiding white light in photosensitive polymeric materials. In this experiment, we study on the observation of incoherent planar dark solitons in bulk materials of Disperse Red 13-doped Poly/(methyl methacrylate/)/(DR13//PMMA/) by using photo-induced molecular reorientation. And after the soliton formation, the guiding of white light from an incandescent lamp was investigated for the first time. The last experiment: All-optical tunable transmission using azo-dye doping amorphous polymer film. In this experiment, we realized the tunable transmission of a 632.8nm probe beam with two kinds of methods. One is using the photo-induced thermal effect of pump light in our azo-dye containing sample, and the other way is to change the temperature of the sample directly. The first one realized an all-optical tunable transmission of the probe light. The other one we call temperature tunable transmission of the probe light.