纳米氧化铈掺杂双单体丙烯酸酯光致聚合物的全息存储特性研究  

Holographic storage properties of photopolymer doped with nanometer ceria

作　　者：郑增荣 刘悠嵘 张磬瀚 申桐 李绍鑫 郑继红[1,2] ZHENG Zeng-rong;LIU You-rong;ZHANG Qin-han;SHEN Tong;LI Shao-xin;ZHENG Ji-hong(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Key Lab of Modern Optical System,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 [2]上海理工大学上海市现代光学系统重点实验室,上海200093

出　　处：《液晶与显示》2023年第7期870-879,共10页Chinese Journal of Liquid Crystals and Displays

基　　金：科技部重点研发计划(No.2018YFA0701802);国家自然科学基金(No.61975122)。

摘　　要：本文研究了纳米氧化铈(CeO_(2))掺杂的双单体丙烯酸酯光致聚合物(TMPTA/EP828)材料的全息存储性能。通过引入纳米CeO_(2)以及优化配方比例来提升材料的全息性能,分析了CeO_(2)掺杂浓度及预聚合温度对衍射效率的影响。实验结果显示,厚度为100μm的透射光栅样品在衍射效率(~95%)、光谱透过率(96.1%)、皱缩率(0.504%)、带宽和角度选择性等方面均表现出优秀性能。CeO_(2)的引入可有效提高TMPTA/EP828系统的交联网络结构和记录介质之间的兼容性,促进聚合反应,抑制体积皱缩,减小复用角度间隔,从而提升全息存储的角度复用性能和材料的稳定性。进一步经过光固化和老化实验证明,优化后的光致聚合物配方具有抗老化和耐高温性能。同时,材料制备工艺流程简便、周期短、易保存,可记录多路复用全息图像,在高密度数据存储等领域具有较广泛的应用前景。This article investigates the holographic storage performance of a dual monomer acrylic ester photo-polymer(TMPTA/EP828)doped with nanoceria(CeO_(2)).By introducing nanoceria and optimizing the formula ratio,the holographic performance of the material is improved.The effect of CeO_(2) doping concentration and pre-polymerization temperature on diffraction efficiency is analyzed.Experimental results show that the transmission grating sample with a thickness of 100μm exhibits excellent performance in terms of diffraction efficiency(~95%),spectral transmittance(96.1%),shrinkage(0.504%),bandwidth,and angular selectivity.The introduction of CeO_(2) can effectively improve the compatibility between the cross-linked network structure of the TMPTA/EP828 system and the recording medium,promote the polymerization reaction,suppress volume shrinkage,and reduce the angle interval of multiplexing,thereby improving the angle-multiplexing performance of holographic storage and the stability of the material.Further verification through photopolymerization and aging experiments confirms that the optimized photopolymer formulation has anti-aging and high-temperature resistance properties.Meanwhile,the material preparation process is simple,the cycle is short,and it is easy to store.It can record multiple multiplexed holographic images and has great application prospects in high-density data storage and other fields.

关 键 词：衍射效率 衍射光学 纳米氧化铈 光致聚合物 全息光存储 

分 类 号：O614.33[理学—无机化学]