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Determining small refractive index contrast in chalcogenide-glass pairs at mid-infrared wavelengths

Fang, Y.; Furniss, D.; Jayasuriya, D.; Parnell, H.; Crane, R.; Tang, Z.Q.; Barney, E.; Canedy, C.L.; Kim, C.S.; Kim, M.; Merritt, C.D.; Bewley, W.W.; Vurgaftman, I.; Meyer, J.R.; Seddon, A.B.; Benson, T.M.

Determining small refractive index contrast in chalcogenide-glass pairs at mid-infrared wavelengths Thumbnail


Authors

Y. Fang

D. Jayasuriya

H. Parnell

R. Crane

Z.Q. Tang

EMMA BARNEY EMMA.BARNEY@NOTTINGHAM.AC.UK
Associate Professor

C.L. Canedy

C.S. Kim

M. Kim

C.D. Merritt

W.W. Bewley

I. Vurgaftman

J.R. Meyer

ANGELA SEDDON angela.seddon@nottingham.ac.uk
Professor of Inorganic Materials

T.M. Benson



Abstract

A two-composition thin film (Ge20Sb10Se70/Ge20Sb10Se67S3 atomic%core/cladding glasses) was fabricated using a hot-fibre-pressing technique in which both glasses follow the same post-fibre processing. A simple approach is proposed that uses normal incidence transmission spectra to determine their refractive index contrast over the wavelength range from 2 to 25 μm with an error of less than _ 0.002. Using an improved Swanepoel method, the calculated numerical aperture of these two compositions was within _ 0.011 of that obtained from prism minimum deviation measurements. Results show that introducing 3 atomic % S into the Ge-Sb-Se glass system lowered the refractive index and blue-shifted the visible optical bandgap, the far-infrared fundamental vibrational absorption bands and the zero-dispersion wavelength.

Citation

Fang, Y., Furniss, D., Jayasuriya, D., Parnell, H., Crane, R., Tang, Z., …Benson, T. (2019). Determining small refractive index contrast in chalcogenide-glass pairs at mid-infrared wavelengths. Optical Materials Express, 9(5), 2022-2036. https://doi.org/10.1364/OME.9.002022

Journal Article Type Article
Acceptance Date Feb 28, 2019
Online Publication Date Apr 2, 2019
Publication Date May 1, 2019
Deposit Date Apr 1, 2019
Publicly Available Date Mar 28, 2024
Journal Optical Materials Express
Electronic ISSN 2159-3930
Publisher Optical Society of America
Peer Reviewed Peer Reviewed
Volume 9
Issue 5
Pages 2022-2036
DOI https://doi.org/10.1364/OME.9.002022
Public URL https://nottingham-repository.worktribe.com/output/1724205
Publisher URL https://www.osapublishing.org/ome/abstract.cfm?uri=ome-9-5-2022

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