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Spectropolarimetric characterization of light scattering materials .

机译:光散射材料的光谱极化表征。

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摘要

UV-VIS-NIR Mueller matrix polarimeters are virtually non-existent due to the scarce availability of optical components performing optimally in such a broad waveband. A spectropolarimeter that measures the complete Mueller matrix of samples in transmission and reflection (ellipsometric) modes from 300 nm to 1100 nm at a high spectral resolution has been successfully designed, developed, calibrated and tested as part of this dissertation. The complete polarimetric characterization of light scattering materials is thus made possible.;Differentiating polarization properties of light scattered from various atmospheric particulate matter species, including pollen, dust, soot and B. subtilis, have been identified. This demonstrates the feasibility of this technique for the discrimination of bio-aerosol from ambient clutter.;Spectral Mueller matrix measurements of Gallium nanoparticles deposited on Sapphire substrates are presented which enables the developed system to locate the associated Localized Surface Plasmon Resonances (LSPRs). Additionally, the depolarization produced by such a nanoparticle system, not quantified previously, is measured by the developed system and duly presented.
机译:由于在如此宽的波段中表现最佳的光学组件的稀缺性,因此几乎不存在UV-VIS-NIR Mueller矩阵旋光仪。作为本论文的一部分,成功设计,开发,校准和测试了一种能在300到1100 nm的透射和反射(椭圆光)模式下以高光谱分辨率测量样品的完整Mueller矩阵的光谱仪。这样就可以对光散射材料进行完整的偏振特性分析。;已经确定了从各种大气颗粒物种类(包括花粉,灰尘,煤烟和枯草芽孢杆菌)散射的光的偏振特性。这证明了该技术从环境杂波中区分生物气溶胶的可行性。提出了沉积在蓝宝石衬底上的镓纳米颗粒的光谱Mueller矩阵测量,这使开发的系统能够定位相关的局部表面等离振子共振(LSPR)。另外,由这种纳米粒子系统产生的去极化,以前未量化,是由已开发的系统测量并适当提出的。

著录项

  • 作者

    Raman, Prashant.;

  • 作者单位

    The University of Alabama in Huntsville.;

  • 授予单位 The University of Alabama in Huntsville.;
  • 学科 Nanoscience.;Physics Optics.
  • 学位 Ph.D.
  • 年度 2012
  • 页码 151 p.
  • 总页数 151
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 TS97-4;
  • 关键词

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