Title

Effect of the substitution of S for Se on the structure and non-linear optical properties of the glasses in the system Ge0.18Ga0.05Sb0.07S0.70-Se-x(x)

Authors

Authors

L. Petit; N. Carlie; R. Villeneuve; J. Massera; M. Couzi; A. Humeau; G. Boudebs;K. Richardson

Comments

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Abbreviated Journal Title

J. Non-Cryst. Solids

Keywords

infrared glasses; chalcogenides; optical properties; non-linear optics; Raman spectroscopy; RAMAN-SPECTRA; AMORPHOUS-SEMICONDUCTORS; CHALCOGENIDE GLASSES; REGION; Materials Science, Ceramics; Materials Science, Multidisciplinary

Abstract

Glasses in the system Ge-Ga-Sb-S/Se have been elaborated with different S/Se ratios in order to increase the non-linear optical properties of these glasses. We report results of a systematic study examining the relationship of the physical properties to the structure of the glasses in the system Ge0.18Ga0.05Sb0.07S0.70-xSex with x = 0, 0.02, 0.05, 0.10, 0.20, 0.30 and 0.40 where the replacement of S by Se has been made. The non-linear refractive index has been measured using the Z-scan technique, with picosecond pulses emitted by a 10 Hz Q-switched mode-locked Nd-Yag laser at 1064 nm under conditions suitable to characterize ultrafast non-linearities. The decrease of the glass transition temperature, the increase of the non-linear refractive index and of the density with the progressive replacement of S by Se have been correlated along with the red shift of the absorption band gap, to associated structural reorganization. A corresponding progressive decrease of corner-sharing GeS4/2 and the formation of mostly two edge-sharing Ge2S4S2/2, S3Ge-S-GeS3 as well as mixed GeS4-xSex units have been identified by Raman spectroscopy. (c) 2006 Elsevier B.V. All rights reserved.

Journal Title

Journal of Non-Crystalline Solids

Volume

352

Issue/Number

50-51

Publication Date

1-1-2006

Document Type

Article

Language

English

First Page

5413

Last Page

5420

WOS Identifier

WOS:000242565100025

ISSN

0022-3093

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