藉由添加高折射率物質及單體改善具光聚合能力之二氧化矽的繞射效率

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藉由添加高折射率物質及單體改善具光聚合能力之二氧化矽的繞射效率

Improving the Diffraction Efficiency of Photopolymerizable Silica by High Refraction Index Species and Monomer

洪譽 , Masters　　Advisor：許子建　　

繁體中文

繞射點散射；高折射率物質；丙烯醯胺；厚度；無機基材；丙烯酸鹽基； Inorganic substrate ； Acrylate ； Acrylamide ； Scattering ； Hight refractive index species ； Thickness

Abstract │ Reference (60) │ Altmetrics

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In this study, the holographic storage materials are prepared with inorganic matrix by sol-gel method. Sample is recorded by green light (532 nm) and read by red light(633nm) to response to diffraction efficiency. The inorganic precursor such as tetraethyl orthosilicate (TEOS) and 3-Glycidoxypropyltrimethoxy silane (γ-GPTMS), which have better material stability、chemical stability and thermal stability. Therefore, silica network is used to substrate in this study. Besides, the monomer will infiltrate in matrix with EGPEA (Ethylene glycol phenyl ether acrylate)、Benzyl methacrylate (BMA) and Acrylamide (AA) which refractive index is 1.518、1.512 and 1.460.The photopolymer film incorporates Titanium(IV) butoxide (Ti(OBu)4) as high refractive index species (HRIS). A amount of Ti(OBu)4 is Si:Ti=4:1. Bis(η5-2,4-cylcopentadien-1-yl)-bis[2,6-difluoro-3-(1H-pyrrol-1-yl)-phenyl]titanium (Irgacure 784) as photoinitiator,the amount og Igacure 784 is 1wt % of monomer. It discuss the relation between diffraction efficiency and thickness、monomer and HRIS. The grating is observed by OM . The period and depth of grating is investigated by AFM. In order to know why the diffraction point scattering and the decay of diffraction efficiency, the light and thermal effect is investigated by varying the intensity of light exposure and TGA.
Thickness of a film is from 330 to 1950 μm. The diffraction efficiency is 52.34 ±7.12 % with 330μm. The diffraction efficiency is 52.11±5.64  by adding Ti(OBu)4.

Keywords: Inorganic substrate, Acrylate, Acrylamide, High refractive index species,Thickness,Scattering

Reference ( 60 ) 〈TOP〉

[1] A.T. Friberg, R. Dändliker, Advances in information optics and photonics, SPIE Press, 2008.
連結：
[2] P. Hariharan "Basic of holography"Cambridge Unerversity Press, Cambridge, 2002
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[3] M.W. Daniels, J. Sefcik, L.F. Francis, A.V. McCormick, Journal of colloid and interface science, 219 (1999) 351-356.
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[4] C.Y. Kuo, T.C. Hsu, W.H. Su, J. Non-Cryst. Solids, 358 (2012) 735-740.
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[6] D.K. Angell, Appl. Optics, 26 (1987) 4692-4702.
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