掺杂TiO_2纳米颗粒的光致聚合物全息特性的研究  

Study of Holographic Characteristics of a Photopolymer Doped with TiO_2 Nanoparticle

作　　者：王龙阁[1] 李飞涛[1] 赵磊[1] 胡宾[2] 王艳[1] 李若平[1] 黄明举[1] 

机构地区：[1]河南大学物理与电子学院光学与光电子技术研究所,河南开封475004 [2]河南大学特种功能材料教育部重点实验室,河南开封475004

出　　处：《中国激光》2010年第12期3103-3107,共5页Chinese Journal of Lasers

基　　金：河南大学省部共建科研基金(SGBJ090513)资助课题

摘　　要：为了降低光致聚合物材料的缩皱,进一步提高材料的衍射效率,制备了一种掺杂TiO2纳米颗粒的光致聚合物材料。该材料以亚甲基蓝作为光敏剂,用波长为647 nm的激光对其进行曝光。研究表明,聚合物中掺入TiO2纳米颗粒后,材料的缩皱率明显降低,衍射效率也有所提高:掺入36 nm的TiO2颗粒后,样品的缩皱率由3.2%降为2.4%,衍射效率从68%提高至70.8%;而掺入10 nm的TiO2颗粒后,样品的缩皱率仅为0.8%,衍射效率最高可达78.1%。说明掺入小粒径的TiO2更有助于提高材料的全息特性。In order to improve the shrinkage properties and the diffraction efficiency of photopolymer material,a photopolymer doped with TiO2 nanoparticle is fabricated.Aparting from using methylene blue trihydrate as photosensitizer,this material is exposed at a wavelength of 647 nm.The experimental results show that the incorporation of TiO2 nanoparticle leads to a significant decrease of the shrinkage and the improvement of diffraction efficiency： the shrinkage is decreased from 3.2% to 2.4% and the diffraction efficiency is increased from 68% to 70.8% in the photopolymer contained with 36 nm TiO2 nanoparticle.However,when the photopolymer doped TiO2 with the size of 10 nm,there are only 0.8% of the shrinkage and the diffraction efficiency amount to 78.1%,which indicates that doped TiO2 nanoparticle with smaller size has more advantages in improving the holographic characteristics than that with the bigger size.

关 键 词：材料 光致聚合物 纳米颗粒 衍射效率 布拉格偏移 

分 类 号：O438.1[机械工程—光学工程]