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Correlating structure with non-linear optical properties in xAs40Se60·(1 − x)As40S60 glasses

DOI: 10.1039/C4CP05599C DOI Help

Authors: Emma R. Barney (University of Nottingham) , Nabil S. Abdel-moneim (University of Nottingham) , James J. Towey (University of Nottingham) , Jeremy Titman (University of Nottingham) , John E. Mccarthy (Heriot Watt University) , Henry T. Bookey (Heriot Watt University) , Ajoy Kar (Heriot Watt University) , David Furniss (University of Nottingham) , Angela B. Seddon (University of Nottingham)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Chemistry Chemical Physics , VOL 17 , PAGES 6314 - 6327

State: Published (Approved)
Published: January 2015

Open Access Open Access

Abstract: A series of xAs40Se60·(100 − x)As40S60 glasses, where x = 0, 25, 33, 50, 67, 75 and 100 mol% As40Se60, has been studied using neutron and X-ray total scattering, Raman spectroscopy and 77Se MAS-NMR. The results are presented with measurements of non-linear refractive indices, n2, and densities. There is no evidence for the formation of homopolar bonds in these glasses, but neutron correlation functions suggest that there is a non-random distribution of sulfur and selenium atoms in sulfur-rich glasses. The average number of sulfur atoms at a distance of 3–4 Å from a selenium atom, nSeS, deviates from a linear variation with x in glasses containing <50 mol% As40Se60; n2 for these glasses also varies non-linearly with x. Importantly, a direct comparison of n2 and nSeS gives a linear correlation, suggesting that n2 may be related to the distribution of chalcogen atoms in the glasses.

Subject Areas: Chemistry, Physics


Instruments: I15-Extreme Conditions