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Structure-optical property correlations of arsenic sulfide glasses in visible, infrared, and sub-millimeter regions
- Source :
-
Journal of Non-Crystalline Solids . Jun2010, Vol. 356 Issue 25-27, p1288-1293. 6p. - Publication Year :
- 2010
-
Abstract
- Abstract: Optical properties and structural aspects of As x S100-x glasses from visible to terahertz wavelengths were explored. A series of annealed, bulk As x S100-x glasses (x =30 to 42) were made and their refractive indices determined at terahertz, infrared, and visible frequencies using a quasi-optical backwards wave oscillator spectrometer for terahertz measurements combined with a prism coupler for visible and infrared measurements. It was found that the refractive index at all frequencies increases with arsenic composition up to 40at.% arsenic and then decreases with additional arsenic. The structure in X-ray diffraction patterns supports the notion of a minimum volume at 40at.%, while the average covalent coordination number indicates that the rigidity percolation threshold is reached there. At arsenic concentrations >40at.%, the network becomes over-constrained, and the molar volume increases. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00223093
- Volume :
- 356
- Issue :
- 25-27
- Database :
- Academic Search Index
- Journal :
- Journal of Non-Crystalline Solids
- Publication Type :
- Academic Journal
- Accession number :
- 51422159
- Full Text :
- https://doi.org/10.1016/j.jnoncrysol.2010.04.018