Article ID Journal Published Year Pages File Type
5141944 Vibrational Spectroscopy 2017 28 Pages PDF
Abstract
The so-called Electric Field Standing Wave (EFSW) Effect has been used by several groups to explain the experimental observation that relative absorbance in FTIR spectra varies with thickness of biomedical samples mounted on a reflective slide. Here, by involving both electric and magnetic fields of an electromagnetic wave, we establish, by classical optical analysis, that there is no such effect. Furthermore, application of multi-interface Fresnel-like simulations to three different systems shows that reflections, transmission and consequent interferences at the “vacuum”/sample interface are solely responsible for the dependence of relative band heights on sample thickness.
Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
Authors
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