Sensitivity-Enhancing Modified Holographic Photopolymer of PQ/PMMA

Author:

Wu Junhui1ORCID,Jin Junchao1,Hu Po2,Li Jinhong1,Zeng Zeyi1,Li Qingdong1,Liu Jie1ORCID,Chen Mingyong1,Zhang Zuoyu1,Wang Li1,Lin Xiao3,Tan Xiaodi3ORCID

Affiliation:

1. College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350117, China

2. Henan Provincial Key Laboratory of Intelligent Lighting, Huanghuai University, Zhumadian 463000, China

3. Information Photonics Research Center, Key Laboratory of Optoelectronic Science and for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Provincial Engineering Technology Research Center of Photoelectric Sensing Application, Fujian Normal University, Fuzhou 350117, China

Abstract

Phenanthrenequinone-doped poly(methyl methacrylate) (PQ/PMMA) photopolymers are potential holographic storage media owing to their high-density storage capacities, low costs, high stability, and negligible shrinkage in volume holographic permanent memory. However, because of the limitations of the substrate, conventional Plexiglas materials do not exhibit a good performance in terms of photosensitivity and molding. In this study, the crosslinked structure of PMMA was modified by introducing a dendrimer monomer, pentaerythritol tetraacrylate (PETA), which increases the photosensitivity of the material 2 times (from ~0.58 cm/J to ~1.18 cm/J), and the diffraction efficiency is increased 1.6 times (from ~50% to ~80%). In addition, the modified material has a superior ability to mold compared to conventional materials. Moreover, the holographic performance enhancement was evaluated in conjunction with a quantum chemical analysis. The doping of PETA resulted in an overall decrease in the energy required for the reaction system of the material, and the activation energy decreased by ~0.5 KJ/mol in the photoreaction stage.

Funder

National Key R&D Program of China

Major Science and Technology Project of Fujian Province

National Natural Science Foundation of China

Programs for Science and Technology Development of Henan Province

Publisher

MDPI AG

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