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Title: A Free Spectroscopic Databank of Optical Constants for Use in Optics Education and Modeling: complex refractive index data n and k from 1.0 to 25 um

Abstract

The reflectance spectra of solid and liquids can be complicated since they depend not only on absorption, but also on the refraction, reflection, and scattering of light, all of which are wavelength dependent. The physical form and morphological effects associated with solid and liquid samples are thus known to affect their reflectance spectra in a non-linear fashion, particularly in the infrared. Measuring the optical constants n(?) and k(?) represents an alternative approach, allowing one to model these many effects and thus requiring fewer laboratory measurements. In this paper an overview is presented of the protocols used to measure the n/k optical constants, particularly for liquids. For the liquids, a multiple path length measurements approach is employed, and in this paper we demonstrate the method to determine the complex optical constants n(?) and k(?) of squalene. The resultant calculated spectra of 1 µm and 100 µm thick layers of squalene on an aluminum substrate as derived from the experimental n(?) and k(?) values are shown to demonstrate such effects. The public availability of the n(?)/k(?) data as well as solids hemispherical reflectance data are also discussed.

Authors:
 [1];  [1];  [1]; ORCiD logo [1];  [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1]
  1. BATTELLE (PACIFIC NW LAB)
  2. PNNL
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1581623
Report Number(s):
PNNL-SA-144111
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: Fifteenth Conference on Education and Training in Optics and Photonics: ETOP 2019
Country of Publication:
United States
Language:
English
Subject:
optical constants, refractive index, solids, Liquids, database, infrared

Citation Formats

Oeck, Ashley M., Tonkyn, Russell G., Loring, John S., Banach, Catherine A., Francis, Ryan M., Burton, Sarah D., Bernacki, Bruce E., Smith, Steven C., Su, Yin-Fong, Szecsody, James E., Saunders, Danielle L., Myers, Tanya L., and Johnson, Timothy J. A Free Spectroscopic Databank of Optical Constants for Use in Optics Education and Modeling: complex refractive index data n and k from 1.0 to 25 um. United States: N. p., 2019. Web. doi:10.1117/12.2532130.
Oeck, Ashley M., Tonkyn, Russell G., Loring, John S., Banach, Catherine A., Francis, Ryan M., Burton, Sarah D., Bernacki, Bruce E., Smith, Steven C., Su, Yin-Fong, Szecsody, James E., Saunders, Danielle L., Myers, Tanya L., & Johnson, Timothy J. A Free Spectroscopic Databank of Optical Constants for Use in Optics Education and Modeling: complex refractive index data n and k from 1.0 to 25 um. United States. doi:10.1117/12.2532130.
Oeck, Ashley M., Tonkyn, Russell G., Loring, John S., Banach, Catherine A., Francis, Ryan M., Burton, Sarah D., Bernacki, Bruce E., Smith, Steven C., Su, Yin-Fong, Szecsody, James E., Saunders, Danielle L., Myers, Tanya L., and Johnson, Timothy J. Tue . "A Free Spectroscopic Databank of Optical Constants for Use in Optics Education and Modeling: complex refractive index data n and k from 1.0 to 25 um". United States. doi:10.1117/12.2532130.
@article{osti_1581623,
title = {A Free Spectroscopic Databank of Optical Constants for Use in Optics Education and Modeling: complex refractive index data n and k from 1.0 to 25 um},
author = {Oeck, Ashley M. and Tonkyn, Russell G. and Loring, John S. and Banach, Catherine A. and Francis, Ryan M. and Burton, Sarah D. and Bernacki, Bruce E. and Smith, Steven C. and Su, Yin-Fong and Szecsody, James E. and Saunders, Danielle L. and Myers, Tanya L. and Johnson, Timothy J.},
abstractNote = {The reflectance spectra of solid and liquids can be complicated since they depend not only on absorption, but also on the refraction, reflection, and scattering of light, all of which are wavelength dependent. The physical form and morphological effects associated with solid and liquid samples are thus known to affect their reflectance spectra in a non-linear fashion, particularly in the infrared. Measuring the optical constants n(?) and k(?) represents an alternative approach, allowing one to model these many effects and thus requiring fewer laboratory measurements. In this paper an overview is presented of the protocols used to measure the n/k optical constants, particularly for liquids. For the liquids, a multiple path length measurements approach is employed, and in this paper we demonstrate the method to determine the complex optical constants n(?) and k(?) of squalene. The resultant calculated spectra of 1 µm and 100 µm thick layers of squalene on an aluminum substrate as derived from the experimental n(?) and k(?) values are shown to demonstrate such effects. The public availability of the n(?)/k(?) data as well as solids hemispherical reflectance data are also discussed.},
doi = {10.1117/12.2532130},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {7}
}

Conference:
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