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🏛️國立陽明交通大學機構典藏

Author: search.filters.author.Lin, SHSubject: search.filters.subject.holography

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Now showing 1 - 3 of 3
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    Comparison of the recording dynamics of phenanthrenequinone-doped poly(methyl methacrplate) materials
    (2001-07-01)
    Mumbru, J
    ;
    Solomatine, I
    ;
    Psaltis, D
    ;
    Lin, SH
    ;
    Hsu, KY
    A comparative analysis of phenanthrenequinone-doped poly(methyl methacrylate) materials fabricated at California Institute of Technology and National Chiao Tung University is performed in order to understand the differences exhibited in their recording and baking dynamics. (C) 2001 Published by Elsevier Science B.V.
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    Effect of ZnMA on optical and holographic characteristics of doped PQ/PMMA photopolymer
    (2005-02-01)
    Hsiao, YN
    ;
    Whang, WT
    ;
    Lin, SH
    ;
    材料科學與工程學系
    ;
    電子物理學系
    We report on the fabrication and experimental characteristics of doping Zinc methylacrylate (ZnMA) and 9,10-phenanthrenequinone (PQ) into a poly(methyl methacrylate) (PMMA) photopolymer. The effects of a ZnMA dopant on the optical and holographic characteristics of ZnMA/PQ/PMMA have been examined. From the optical and holographic measurements of different samples with different composition ratios, we found that the time to reach the maximum diffraction efficiency has been reduced from 102 to 59 (reduced by 1.7 times) and the diffraction efficiency has been raised up from 0.57 to 1.62% (increased by 2.9 times). We also found that holographic gratings can be recorded in pure PQ-doped PMMA, but cannot be recorded in pure ZnMA-doped PMMA. The higher the concentration of PQ in codoped PMMA, the higher the diffraction efficiency. In contrast, the higher ZnMA concentration in the codoped PMMA, the shorter the response time. It is proposed that PQ serves as a photosensitive reactant and plays a major role in the formation of phase gratings. ZnMA serves as a sufficient catalyst to accelerate the reaction of PQ with a polymer or ZnMA. By adding ZnMA with a proper concentration into a PQ/PMMA photopolymer, we succeeded in improving the holographic characteristic of the photopolymer.
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    Doped PMMA photopolymer for volume holographic recording
    (2003)
    Lin, SH
    ;
    電子物理學系
    ;
    Department of Electrophysics
    In this paper, we report investigations on chemical analyses and optical measurements of our PQ doped PMMA photopolymer material. We have analyzed chemical compositions of four different samples: PQ doped PMMA solid and PQ dissolved MMA liquid samples, with light exposed and unexposed conditions, respectively. The investigations provide us a good understanding about the photochemical behaviors of the PQ and the MMA molecules during optical recording. Then, a mechanism for holographic recording is proposed. This result has been applied to develop photopolymers doped with different dye molecules. With changing of dye molecules, we have made three new PMMA-based photopolymers. Their holographic recording characteristics have been tested and discussed.