期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 191, 期 -, 页码 283-289出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2017.10.033
关键词
Infrared spectroscopy; Transflection; IRRAS; Electric field enhancement; Electric field standing wave effect
类别
资金
- EU
- Thuringer Ministerium fur Wirtschaft, Wissenschaft and Digitate Gesellschaft
- Thuringer Aufbaubank
- Federal Ministry of Education and Research, Germany (BMBF)
- German Science Foundation
- Fonds der Chemischen Industrie
- Carl-Zeiss Foundation
We show that an electric field standing wave effect is responsible for the oscillations and the non-linear dependence of the absorbance on the layer thickness in thin layers on a reflective surface. This effect is connected to the occurrence of interference inside these layers. Consequently, the absorptance undergoes a maximum electric field intensity enhancement at spectral positions close to those where corresponding non-absorbing layers on a metal show minima in the reflectance. The effect leads to changes of peak maxima ratios with layer thickness and shows the same periodicity as oscillations in the peak positions. These peculiarities are fully based on and described by Maxwell's equations but cannot be understood and described if the strongly simplifying model centered on reflectance absorbance is employed. (C) 2017 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据