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Proceedings Paper

Accuracy of different Kramers-Konig transformations from reflectivity to phase shift on attenuated total reflection
Author(s): John E. Bertie; Zhida Lan
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Paper Abstract

We examine the accuracy of two published and one new Kramers-Kronig (KK) transformations from reflectivity to phase shift on attenuated total reflection (ATR), by exploring the simulated ATR spectra of liquid methanol with ZnSe or silicon as transparent phase. A simple non constant correction to the phase shift is also proposed to reduce the approximation that is introduced into the KK transforms by the small wavenumber dependence of the real refractive index of the transparent phase in the IR region. for the methanol spectrum with silicon as transparent phase, the recovered phase shift can be accurate to 0.0001 radian. This corresponds to 0.02% and 0.04% accuracy in the recovered real, n, and imaginary, k, refractive indices respectively.

Paper Details

Date Published: 31 January 1994
PDF: 2 pages
Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); doi: 10.1117/12.166566
Show Author Affiliations
John E. Bertie, Univ. of Alberta (Canada)
Zhida Lan, Univ. of Alberta (Canada)


Published in SPIE Proceedings Vol. 2089:
9th International Conference on Fourier Transform Spectroscopy
John E. Bertie; Hal Wieser, Editor(s)

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