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Proceedings Paper

IR Reflectance Properties Of Weakly And Strongly Absorbing Surface Films
Author(s): Yu-Sze Yen; James S. Wong
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Paper Abstract

In an external reflection measurement, the optical properties of a surface film can give rise to a variety of spectral behavior on metallic and nonmetallic substrates. The diversity of behavior can be explained by the presence of transverse optical (TO) and longitudinal optical (LO) bands of the film in the infrared region. The excitation modes associated with these bands are directional with respect to the plane of the surface. Spectral interpretation is facilitated by understanding the roles of the TO and LO bands in reflectance spectra, the substrate selection rules for the appearance of these bands, and the relationship between the TO and LO frequencies. We will show that weakly absorbing films have a simpler optical behavior than strongly absorbing films.

Paper Details

Date Published: 1 December 1989
PDF: 4 pages
Proc. SPIE 1145, 7th Intl Conf on Fourier Transform Spectroscopy, (1 December 1989); doi: 10.1117/12.969426
Show Author Affiliations
Yu-Sze Yen, IBM Almaden Research Center (United States)
James S. Wong, IBM General Products Division (United States)


Published in SPIE Proceedings Vol. 1145:
7th Intl Conf on Fourier Transform Spectroscopy

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