Issue 9, 2015

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

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.

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

Article information

Article type
Paper
Submitted
03 Dec 2014
Accepted
22 Jan 2015
First published
23 Jan 2015
This article is Open Access
Creative Commons BY license

Phys. Chem. Chem. Phys., 2015,17, 6314-6327

Author version available

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

E. R. Barney, N. S. Abdel-Moneim, J. J. Towey, J. Titman, J. E. McCarthy, H. T. Bookey, A. Kar, D. Furniss and A. B. Seddon, Phys. Chem. Chem. Phys., 2015, 17, 6314 DOI: 10.1039/C4CP05599C

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