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Title: Complex refractive index measurements for BaF 2 and CaF 2 via single-angle infrared reflectance spectroscopy

Abstract

We have re-investigated the optical constants n and k for the homologous series of inorganic salts barium fluoride (BaF2) and calcium fluoride (CaF2) using a single-angle near-normal incidence reflectance device in combination with a calibrated Fourier transform infrared (FTIR) spectrometer. Our results are in good qualitative agreement with most previous works. However, certain features of the previously published data near the reststrahlen band exhibit distinct differences in spectral characteristics. Notably, our measurements of BaF2 do not include a spectral feature in the ~250 cm-1 reststrahlen band that was previously published. Additionally, CaF2 exhibits a distinct wavelength shift relative to the model derived from previously published data. We confirmed our results with recently published works that use significantly more modern instrumentation and data reduction techniques

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20)
OSTI Identifier:
1393741
Report Number(s):
PNNL-SA-125226
Journal ID: ISSN 0925-3467; WN0219080
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Optical Materials
Additional Journal Information:
Journal Volume: 72; Journal Issue: C; Journal ID: ISSN 0925-3467
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Kelly-Gorham, Molly Rose K., DeVetter, Brent M., Brauer, Carolyn S., Cannon, Bret D., Burton, Sarah D., Bliss, Mary, Johnson, Timothy J., and Myers, Tanya L. Complex refractive index measurements for BaF 2 and CaF 2 via single-angle infrared reflectance spectroscopy. United States: N. p., 2017. Web. doi:10.1016/j.optmat.2017.06.052.
Kelly-Gorham, Molly Rose K., DeVetter, Brent M., Brauer, Carolyn S., Cannon, Bret D., Burton, Sarah D., Bliss, Mary, Johnson, Timothy J., & Myers, Tanya L. Complex refractive index measurements for BaF 2 and CaF 2 via single-angle infrared reflectance spectroscopy. United States. doi:10.1016/j.optmat.2017.06.052.
Kelly-Gorham, Molly Rose K., DeVetter, Brent M., Brauer, Carolyn S., Cannon, Bret D., Burton, Sarah D., Bliss, Mary, Johnson, Timothy J., and Myers, Tanya L. Sun . "Complex refractive index measurements for BaF 2 and CaF 2 via single-angle infrared reflectance spectroscopy". United States. doi:10.1016/j.optmat.2017.06.052.
@article{osti_1393741,
title = {Complex refractive index measurements for BaF 2 and CaF 2 via single-angle infrared reflectance spectroscopy},
author = {Kelly-Gorham, Molly Rose K. and DeVetter, Brent M. and Brauer, Carolyn S. and Cannon, Bret D. and Burton, Sarah D. and Bliss, Mary and Johnson, Timothy J. and Myers, Tanya L.},
abstractNote = {We have re-investigated the optical constants n and k for the homologous series of inorganic salts barium fluoride (BaF2) and calcium fluoride (CaF2) using a single-angle near-normal incidence reflectance device in combination with a calibrated Fourier transform infrared (FTIR) spectrometer. Our results are in good qualitative agreement with most previous works. However, certain features of the previously published data near the reststrahlen band exhibit distinct differences in spectral characteristics. Notably, our measurements of BaF2 do not include a spectral feature in the ~250 cm-1 reststrahlen band that was previously published. Additionally, CaF2 exhibits a distinct wavelength shift relative to the model derived from previously published data. We confirmed our results with recently published works that use significantly more modern instrumentation and data reduction techniques},
doi = {10.1016/j.optmat.2017.06.052},
journal = {Optical Materials},
issn = {0925-3467},
number = C,
volume = 72,
place = {United States},
year = {2017},
month = {10}
}