在量化减弱总反射光谱分析平面样本中克服接触问题
1Centro de Física das Universidades do Minho e do Porto (CF-UM-UP), Laboratório de Física para Materiais e Tecnologias Emergentes (LaPMET) and Departamento de Física, Universidade do Minho, Braga, Portugal.
Applied spectroscopy
|September 13, 2023
概括
本研究提出了一种新的方法,用于测量光学功能,使用减弱总反射光谱,即使与样品接触不良. 该技术通过在光谱分析过程中将样本间距视为可调节的参数来准确确定光学特性.
科学领域:
- 频谱学是一种光谱学.
- 光学物理学的光学物理学
- 材料科学 材料科学 材料科学
背景情况:
- 减弱总反射 (ATR) 光谱是分析材料光学特性的一种强大技术.
- 当样本与内部反射元件之间接触不良时,精确测量光学功能的测量可能具有挑战性.
- 现有的方法可能在不理想的接触条件下难以提供可靠的结果.
研究的目的:
- 开发一种可靠的方法来测量使用ATR光谱学的同质,同otropic材料的光学功能.
- 为了应对ATR测量中样品与内部反射元件接触不良的挑战.
- 为了使光学属性的准确确定,即使差距距是未知的.
主要方法:
- 拟议的方法涉及将内部反射元件和样品之间的距离视为可调节的参数.
- 执行s-和p-极化光谱的同时拟合,将未知的间隙距离纳入模型.
- 该方法利用分散模型参数与间距参数一起进行全面分析.
主要成果:
- 该方法在使用合成和实验 (聚乙烯) 频谱时成功测试.
- 尽管存在接触问题,但仍然可以实现光学功能的准确确定.
- 结果验证了将样本间距作为可变参数的有效性.
结论:
- 开发的方法提供了一种可靠的方法,可以通过ATR光谱测量光学功能,即使与样品接触不完美.
- 这种技术提高了ATR光谱在实验条件低于最佳的场景中的适用性.
- 在存在接触问题时精确确定光学功能的能力为材料表征提供了显著的优势.
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