天青Ⅰ和天青Ⅱ敏化的红敏光致聚合物全息特性研究
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摘要
目前,传统的光盘存储与磁存储技术已经逐渐接近物理极限,其存储密度和存储容量仍然满足不了现代社会的需要,于是人们把目光投向了一门新的存储技术——数字全息存储技术,该技术由于具有良好的存储特性,近来吸引了越来越多人的兴趣。为使该技术实用化,人们研究了许多全息记录材料,这当中,光致聚合物因具有许多优点而成为了研究的热点,本文研究了天青Ⅰ和天青Ⅱ敏化的光致聚合物的全息特性并做了下面这些有意义的工作。
     1.制备了两种分别由天青Ⅰ,天青Ⅱ敏化的新型红敏全息存储材料样品(依次称为样品1,样品2)。
     2.在两种样品中,分别研究了样品的感光光谱范围;曝光能量不同时透过率随曝光时间的变化关系:对两种染料天青Ⅰ,天青Ⅱ的浓度进行了优化配比设计;研究了样品最大衍射效率(η_(max)),感光灵敏度(S)和折射率调制度(△n)与样品厚度的关系,并最终在材料中进行了光学全息存储实验。
     3.在样品1中,还对三乙醇胺(TEA)的浓度进行了优化配比实验,而在样品2中还研究了衍射效率与曝光强度的变化关系以及衍射效率与物光强和参考光强比值的依赖关系。
     4.当两种样品厚度相同时,对它们的全息性能进行了比较研究,包括吸收光谱的比较,衍射效率与染料浓度的变化关系的比较,同一光强下最大透过率与曝光时间依赖关系的比较,同一光强下衍射效率跟曝光时间依赖关系的比较,衍射效率与样品厚度的依赖关系的比较,折射率调制度与样品厚度的依赖关系的比较等。
Nowadays,traditional compact disc storage and magnetic storage technologies gradually approach physical limit,but their storage density and storage capacity do not meet the demand of modern society,so people divert their eyes to a kind of new technology-digital holographic storage technology.Because it has excellent storage performance,it attracts the interest of more and more people recently.To make it practical,many holographic storage materials are investigated.In these materials, photopolymer becomes a focus for its many advantages.In this dissertation,the photopolymers sensitized by AzureⅠand AzureⅡare investigated and the below meaningful jobs are included:
     1.Two kinds of red-sensitive holographic storage photopolymer samples(Named as Sample 1 and Sample 2 in order) sensitized by AzureⅠand AzureⅡrespectively are fabricated.
     2.In the Sample 1 and 2,many optical characteristics such as sensitive spectral range,the relationship of transmittance and exposure time under different exposure intensity,the optimization of dye concentration,the relationship of maximum diffraction efficiency,exposure sensitivity or refractive index modulation and thickness of sample are investigated.Finally,the experiments of holographic storage are done in two samples.
     3.The optimization of triethanolamine concentration of Sample 1 is investigated.The holographic characteristics such as the relationship of diffraction efficiency and exposure intensity,the dependence of diffraction efficiency and the different ratios of object beam intensity to reference beam intensity in the Sample 2 are studied.
     4.The holographic characteristics of two samples are compared.They include contrast of absorption spectra,diffraction efficiency versus the concentration of dye,the maximum transmittance versus exposure time under the same intensity,diffraction efficiency versus exposure time under the same intensity,diffraction efficiency versus different thicknesses of samples and the refractive index modulation versus different thicknesses of samples.
引文
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