Wang Jundi, Fu Qingyang, Zhang Yaping, Zhang Bing
Yunnan Provincial Key Laboratory of Modern Information Optics, Kunming University of Science and Technology, Kunming 650500, China.
Polymers (Basel). 2023 Nov 13;15(22):4391. doi: 10.3390/polym15224391.
To enhance the holographic properties, one of the main methods is increasing the solubility of the photosensitizer and modifying the components to improve the modulation of the refractive index in the photopolymer. This study provides evidence, through the introduction of a mutual diffusion model, that the incorporation of SiO nanoparticles in photopolymers can effectively enhance the degree of refractive index modulation, consequently achieving the objective of improving the holographic performance of the materials. Different concentrations of SiO nanoparticles have been introduced into highly soluble photosensitizer Irgacure 784 (solubility up to 10wt%)-doped poly-methyl methacrylate (Irgacure 784/PMMA) photopolymers. Holographic measurement experiments have been performed on the prepared samples, and the experiments have demonstrated that the Irgacure 784/PMMA photopolymer doped with 1.0 × 10-3wt% SiO nanoparticles exhibits the highest diffraction efficiency (74.5%), representing an approximate 30% increase in diffraction efficiency as compared to an undoped photopolymer. Finally, we have successfully achieved the recording of real objects on SiO/Irgacure 784/PMMA photopolymers, demonstrated by the SiO/Irgacure 784/PMMA photopolymer material prepared in this study, which exhibits promising characteristics for holographic storage applications. The strategy of doping nanoparticles (Nps) in Irgacure 784/PMMA photopolymers has also provided a new approach for achieving high-capacity holographic storage in the future.
为了增强全息性能，主要方法之一是提高光敏剂的溶解度并改变组分，以改善光聚合物中折射率的调制。本研究通过引入互扩散模型提供了证据，即向光聚合物中掺入SiO纳米颗粒可以有效提高折射率调制程度，从而实现提高材料全息性能的目标。已将不同浓度的SiO纳米颗粒引入到高溶解性光敏剂Irgacure 784（溶解度高达10wt%）掺杂的聚甲基丙烯酸甲酯（Irgacure 784/PMMA）光聚合物中。对制备的样品进行了全息测量实验，实验表明，掺杂1.0×10-3wt% SiO纳米颗粒的Irgacure 784/PMMA光聚合物表现出最高的衍射效率（74.5%），与未掺杂的光聚合物相比，衍射效率提高了约30%。最后，我们成功地在SiO/Irgacure 784/PMMA光聚合物上实现了实物记录，本研究制备的SiO/Irgacure 784/PMMA光聚合物材料证明了这一点，该材料在全息存储应用中表现出有前景的特性。在Irgacure 784/PMMA光聚合物中掺杂纳米颗粒（Nps）的策略也为未来实现高容量全息存储提供了一种新方法。
