富勒烯掺杂的光致聚合物的全息存储特性研究  

Study on holographic storage properties of fullerene-doped photopolymer

作　　者：李绍鑫 刘悠嵘 郑增荣 朱宁 邢陈陈 郑继红[1] LI Shaoxin;LIU Yourong;ZHENG Zengrong;ZHU Ning;XING Chenchen;ZHENG Jihong(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《光学仪器》2024年第1期23-30,共8页Optical Instruments

摘　　要：研究了富勒烯对六官能团脂肪族聚氨酯丙烯酸酯/环氧树脂(RJ423/EPIKOTE 828)体系光致聚合物的全息性能的影响,分析了富勒烯(C_(60))材料以及曝光光强对光致聚合物衍射效率的影响。通过吸收光谱结合X射线衍射图谱分析,掺杂的富勒烯既没有和聚合物中的其他成分发生化学反应,也不影响材料本身的结构和结晶性能。实验结果表明,富勒烯掺杂提高了单体聚合反应的速率,并且参与活性单体分子之间的扩散。在光强20 mW/cm^(2)、时间40~50 s、厚度200µm时,光致聚合物的衍射效率提升到86%,感光灵敏度达到1.32 cm^(2)/J,收缩率降低了约80%。由于C_(60)促进聚合,抑制体积收缩,从而增强全息存储的稳定性,经过全息图像存储实验对比,证明该光致聚合物掺杂富勒烯之后具有优秀的全息存储性能,同时也表明富勒烯掺杂的光致聚合物在全息储存领域具有较大的应用前景。In this paper,the effect of fullerene on the holographic properties of photopolymers in the hexafunctional aliphatic polyurethane acrylate/epoxy resin(RJ423/EPIKOTE 828)system was studied,and the influence of fullerene(C_(60))and exposure light intensity on photopolymers diffraction efficiency were analyzed.The absorption spectrum combined with X-ray diffraction pattern analysis illustrates that the doped fullerene does not chemically reacts with other components in the polymer,and does not impacts on its structure and crystallization properties.Experimental results demonstrate that fullerene doping can effectively increase the rate of monomer polymerization and participate in the diffusion between active monomer molecules.The diffraction efficiency of the photopolymer increases to 86%with the thickness of 200µm,which the photosensitivity reaches 1.32 cm^(2)/J and the shrinkage rate is reduced by 5 times under the light intensity of 20 mW/cm^(2) for time of 40~50 s.C_(60) may enhance the stability of holographic storage,owing to the promotion of polymerization and the suppression of the shrinkage.The comparison of holographic image storage experiments illuminates that the photopolymer doped with fullerene has excellent holographic storage performance,which also shows that fullerene doped photopolymers have great application prospects in the field of holographic storage.

关 键 词：衍射光学 富勒烯 衍射效率 光致聚合物 全息光存储 

分 类 号：O438.1[机械工程—光学工程]