绿敏全息记录介质的光敏剂合成及性能研究  

Synthesis and Properties of Photosensitizer for Green-Sensitive Holographic Recording Medium

作　　者：张荻琴 赵宇[2] 张震 朱建华[3] 赵榆霞[1,4] Zhang Diqin;Zhao Yu;Zhang Zhen;Zhu Jianhua;Zhao Yuxia(Key Laboratory of Photochemical Conversion and Optoelectronic Materials,Technical Institute of Physics and,Chemistry Chinese Academy of Sciences,Beijing 100190,China;Optoelectronic Technology and Equipment R&D Center,Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang,Sichuan 621900,China;College of Physics,Sichuan University,Chengdu,Sichuan 610065,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院理化技术研究所光化学转换与功能材料重点实验室,北京100190 [2]中国工程物理研究院流体物理研究所光电技术与装备研发中心,四川绵阳621900 [3]四川大学物理学院,四川成都610065 [4]中国科学院大学,北京100049

出　　处：《光学学报》2022年第2期63-71,共9页Acta Optica Sinica

基　　金：国家重点研发计划(2016YFA0200500);中物院院长基金(YZJJLX2019002)。

摘　　要：全息记录介质中光敏剂的用量非常少,但对记录波长的选择起到决定性的作用。针对最常用的532 nm激光器,设计并合成一系列环戊酮类光敏剂,研究它们的光谱特性、敏化引发单体聚合的反应动力学及其在光致聚合物型全息记录介质中的应用性能。结果表明,含有BTMI(2,5-bis(2-(1,3,3-trimethylindolin-2-ylidene)ethylidene)cyclopentanone)的样品具有最优的全息记录性能,在总曝光量为64 mJ/cm^(2)的情况下单光栅衍射效率达到90%,折射率调制度为4.14×10^(-4),Bragg光栅选择角的半峰全宽为0.90°。在单个激光脉冲(波长为532 nm,脉宽为150~200 ps,能量密度为25 mJ/cm^(2))的曝光下,该样品能够获得衍射效率为7%的全息光栅,说明可以实现信息的快速记录。通过配方的优化,BTMI有望应用于制备快速且高密度的全息存储介质。The amount of photosensitizer in holographic recording media is very small, but it plays a decisive role in the selection of recording wavelength. A series of cyclopentanone photosensitizers are designed and synthesized for 532 nm laser, and their spectral characteristics, reaction kinetics to induce monomer polymerization, and application performance in photopolymer for holographic recording are studied. The results show that the sample containing BTMI(2,5-bis(2-(1,3,3-trimethylindolin-2-ylidene)ethylidene)cyclopentanone) has the best holographic recording performance, and the diffraction efficiency of single grating reaches 90% when the total exposure dosage is 64 mJ/cm^(2), the refractive index modulation is 4.14×10^(-4), and the full width of half peak of Bragg grating selection angle is 0.90°. Under the exposure of a single laser pulse(wavelength is 532 nm, pulse width is 150--200 ps, energy density is 25 mJ/cm^(2)), the sample can obtain a holographic grating with diffraction efficiency of 7%, indicating that information can be recorded quickly. By optimizing the formulation, BTMI is expected to be applied to fabricate fast and high density holographic storage media.

关 键 词：全息 全息存储 光致聚合物 感绿光敏剂 衍射效率 单脉冲曝光 

分 类 号：O438.1[机械工程—光学工程]