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Grating translation technique as a tool for monitoring phase shifts during holographic recording in azo-polymers

机译:光栅平移技术作为监测偶氮聚合物全息记录过程中相移的工具

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摘要

Grating translation technique, elaborated for photorefractive materials, can be used for determination of amplitude and phase grating contributions to light diffraction efficiency after holographic recording in photochromic polymer films. Here, we report application of this technique to in situ analysis of the formation of light inscribed diffraction gratings in azo-functionalized polymers. This technique allows for monitoring amplitudes and phase shifts between phase and amplitude gratings during holographic recording. For the investigation, we chose two azo-polymers with identical azo-substituents and characterized by qualitatively different temporal evolutions of grating build-up process during holographic recording with light s-s polarization geometry. The observed differences in grating recording kinetics for these polymers are explained by the difference in dynamics of build-up of amplitude and phase gratings including surface relief gratings and the spatial phase shifts between them and light interference pattern. Methodology described in this work could be applied to systems in which complex mechanism of refractive index changes upon light illumination are expected.
机译:在光致变色材料薄膜中进行全息记录后,可对光折变材料进行详细阐述的光栅平移技术可用于确定振幅和相位光栅对光衍射效率的贡献。在这里,我们报告了该技术在偶氮官能化聚合物中光内切衍射光栅的形成的原位分析中的应用。该技术允许在全息记录期间监视相位和振幅光栅之间的振幅和相移。为了进行研究,我们选择了两种具有相同偶氮取代基的偶氮聚合物,其特征是在全息记录过程中光栅具有光s-s偏振几何形状时,光栅堆积过程在时间上存在质的差异。这些聚合物在光栅记录动力学上观察到的差异可以通过振幅和相位光栅(包括表面起伏光栅)的建立动力学差异以及它们与光干涉图样之间的空间相移来解释。在这项工作中描述的方法可以应用于预期在光照下折射率变化的复杂机制的系统。

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  • 来源
    《Journal of Applied Physics》 |2010年第8期|p.083540.1-083540.9|共9页
  • 作者单位

    Institute of Physical and Theoretical Chemistry, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland;

    rnCentre of Polymers and Carbon Materials, Polish Academy of Sciences, 34 M. Curie Sklodowska Str., 41-819 Zabrze, Poland;

    rnInstitute of Physical and Theoretical Chemistry, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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