Characteristics of PEGPEA/PMMA Holographic Gratings Illuminated by Various Laser Wavelengths

• Main Authors: Xin-Jin Wang, 王辛晉
• Other Authors: Wei-Hung Su
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/25ujc4

碩士 === 國立中山大學 === 材料與光電科學學系研究所 === 107 === Photopolymerizable holographic materials have the great advantage of recording and reading holograms in real time due to their good light sensitivity, real-time image development, large dynamic range, and low cost. In this paper, an approach to fabricate photopolymerizable materials is presented. The EGPEA (ethylene glycol phenyl ether acrylate) is selected as the monomer, and the Irgacure 784 is employed as the photo-initiator. The porous substrate formed by PMMA [poly(methyl methacrylate)] is then subjected to the subsequent infiltration of the monomers EGPEA and the photo-initiator Irgacure 784. Once it is exposed to photo-illumination, the linear acrylate polymer chains are formed within the PMMA matrix, leading to a change of refractive index. To reduce the recording time, the high refractive index species, titanium dioxide (TiO2), is filled into this composite material.