Compositional dependence of the nonlinear refractive index of new germanium-based chalcogenide glasses
- School of Materials Science and Engineering, Clemson University, Clemson, SC 29634 (United States)
- Laboratoire des Proprietes Optiques des Materiaux et Applications, UMR CNRS 6163, Universite d'Angers, 2 Boulevard Lavoisier, 49045 Angers Cedex 01 (France)
- Microphotonics Center, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States)
In this paper, we report results of n{sub 2} measurements of new chalcogenide glasses in the Ge-Sb-S-Se system using a modified Z-Scan technique. Measurements were made with picosecond pulses emitted by a 10 Hz Q-switched mode-locked Nd-YAG laser at 1064 nm under conditions suitable to characterize ultrafast nonlinearities. The nonlinear index increases up to 500 times the n{sub 2} of fused silica with an increase in the Ge/Se ratio and a decrease with an increase of the Ge/Sb ratio. We confirmed, using Raman spectroscopy, that the nonlinear refractive index depends on the number of Ge-S(Se) and Sb-S(Se) bonds in the glass network. Sulfide glasses were shown to have a nonlinear FOM near or <1, at 1064 nm. - Graphical abstract: In this paper, we report results of n{sub 2} measurements of new chalcogenide glasses in the Ge-Sb-S-Se system using a modified Z-Scan technique. n{sub 2} is found to increase with an increase of normalized photon energy, regardless of chalcogen type, but does not depend on the concentration of lone pair electron.
- OSTI ID:
- 21372342
- Journal Information:
- Journal of Solid State Chemistry, Vol. 182, Issue 10; Other Information: DOI: 10.1016/j.jssc.2009.07.027; PII: S0022-4596(09)00348-X; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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