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Proceedings Paper

Spectral signatures of solids and liquids on different substrates: the need for accurate optical constants
Author(s): Tanya L. Myers; Russell G. Tonkyn; Brent DeVetter; Tyler O. Danby; Nicole K. Scharko; Ashley M. Oeck; John S. Loring; Yin-Fong Su; Timothy J. Johnson
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Paper Abstract

Other than water, pure bulk liquids and solids are rarely encountered in the environment, but more commonly exist as layers on various substrates, e.g. concrete, metals, glass, etc. Unlike gas-phase transmission spectra, condensed-phase reflectance spectra depend not only on absorption, but also on the material’s refraction and reflection at interfaces. Providing reference spectra to account for the plethora of morphological conditions (e.g. substrate, layer thickness, particle or droplet size) that may be encountered under different scenarios is a daunting challenge. An alternative approach is to derive the complex optical constants, n and k, which can be used to model the optical phenomena in media and at interfaces, minimizing the need for a vast number of laboratory measurements. The current status of obtaining such optical constants for both solids and liquids is briefly summarized.

Paper Details

Date Published: 4 September 2018
PDF: 8 pages
Proc. SPIE 10750, Reflection, Scattering, and Diffraction from Surfaces VI, 1075005 (4 September 2018); doi: 10.1117/12.2321318
Show Author Affiliations
Tanya L. Myers, Pacific Northwest National Lab. (United States)
Russell G. Tonkyn, Pacific Northwest National Lab. (United States)
Brent DeVetter, Pacific Northwest National Lab. (United States)
Tyler O. Danby, Pacific Northwest National Lab. (United States)
Nicole K. Scharko, Pacific Northwest National Lab. (United States)
Ashley M. Oeck, Pacific Northwest National Lab. (United States)
John S. Loring, Pacific Northwest National Lab. (United States)
Yin-Fong Su, Pacific Northwest National Lab. (United States)
Timothy J. Johnson, Pacific Northwest National Lab. (United States)


Published in SPIE Proceedings Vol. 10750:
Reflection, Scattering, and Diffraction from Surfaces VI
Leonard M. Hanssen, Editor(s)

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