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Issue 9, 2015
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Correlating structure with non-linear optical properties in xAs40Se60·(1 − x)As40S60 glasses

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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

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Publication details

The article was received on 03 Dec 2014, accepted on 22 Jan 2015 and first published on 23 Jan 2015


Article type: Paper
DOI: 10.1039/C4CP05599C
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Citation: Phys. Chem. Chem. Phys., 2015,17, 6314-6327
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    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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