Optical and structural properties of new chalcohalide glasses
- 作者：M. Guignard ; V. Nazabal ; A. Moreac ; S. Cherukulappurath ; G. Boudebs ; H. Zeghlache ; G. Martinelli ; Y. Quiquempois ; F. Smektala ; J.-L. Adam
- 关键词：Chalcohalides ; Non-linear optics ; Raman Spectroscopy ; Short-range order
- 刊名：Journal of Non-Crystalline Solids
- 出版年：2008
- 期刊代码：50_00223093
- 类别：ms
- 出版时间：15 February 2008
- 卷：354
- 期：12-13
- 页码：1322-1326
- 文件大小：176 K
摘要
New class of chalcohalide glasses has been prepared in the GeS<sub>2sub>–In<sub>2sub>S<sub>3sub>–CsI system with regard to their potential non-linear properties. The study of glass-forming region was undertaken to select glassy compositions, which present high non-linear (NL) optical properties with a low two-photon absorption. Thermal analyses, structural examination by Raman spectroscopy, non-linear optical measurements were investigated as a function of CsI contents. Introduction of CsI has shifted the band-gap edge towards the blue region of the absorption optical spectrum and therefore has limited the two-photon absorption. Their NL refractive index n<sub>2sub> are 60 times higher than silica glasses without any NL absorption. Moreover, second harmonic signal was observed in thermally poled samples similar to silica glass. However, this second order non-linearity is not temporally stable.