Abstract

Thin films of poly(vinyl chloride), poly(methyl methacrylate), and poly(styrene) were analyzed by Fourier transform infrared spectroscopy. The interference fringes present in the transmission spectra of these samples were used to determine film thickness and average refractive index. Subsequent Kramers-Kronig analysis of these transmission spectra provided the dispersion of the refractive index and the absorption index across the entire mid-infrared region. Interference fringes were absent in the optical constant spectra, and good agreement was obtained between our optical constant spectra and those of other authors.

Simultaneous determination of thickness and optical constants of polymer thin film by analyzing transmittance

Changsoo Jung and Bum Ku Rhee
Appl. Opt. 41(19) 3861-3865 (2002)

Infrared optical constant determination of weakly absorbing dielectric thin films

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Optical constant determination of thin films

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Rusli and G. A. J. Amaratunga
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Determination of optical constants of thin films in the EUV

Richard Ciesielski, Qais Saadeh, Vicky Philipsen, Karl Opsomer, Jean-Philippe Soulié, Meiyi Wu, Philipp Naujok, Robbert W. E. van de Kruijs, Christophe Detavernier, Michael Kolbe, Frank Scholze, and Victor Soltwisch
Appl. Opt. 61(8) 2060-2078 (2022)