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-X SeX

Keywords

Chalcogenides; Infrared glasses; Non-linear optics; Optical properties; Raman spectroscopy

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-x Sex 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. © 2006 Elsevier B.V. All rights reserved.

Publication Date

12-1-2006

Publication Title

Journal of Non-Crystalline Solids

Volume

352

Issue

50-51

Number of Pages

5413-5420

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.jnoncrysol.2006.08.040

Socpus ID

33751027238 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33751027238

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