CsCl Effected Ultrafast Third-order Optical Nonlinearities of GeS_2-Sb_2S_3 Chalcogenide Glasses  

作　　者：Hua Zhang Qiuhua Nie Shixun Dai Xiang Shen Xunsi Wang Xianghua Zhang 

机构地区：[1]Faculty of Information Science and Engineering, The State Key Laboratory Base of Novel Functional Materialsand Preparation Science, Ningbo University, Ningbo 315211, China [2]Universite de Rennes I, Rennes 35042, France

出　　处：《Journal of Materials Science & Technology》2009年第6期772-776,共5页材料科学技术（英文版）

基　　金：supported by the National Ba-sic Research Program of China ("973 Project", (No2006CB708607);the Science and Technology Department of Zhejiang Province, China (No 2006C11127);the Science and Technology Foundation of Ningbo, China (No2006B100068);the Natural Science Foundation of Ningbo, China (Nos 2006A610056, 2007A610004)

摘　　要：A series of alkali halide doped chalcohalide glasses （100-x）（0.9GeS2-0.1Sb2S3）-xCsCl （x=5, 10, 15 and 20 mole fraction） were prepared. The absorption spectra and Raman scatting spectra of these glasses were measured. The optical band gaps Eopt were obtained from ultraviolet absorption edges. Z-scan technique was utilized to investigate the third-order nonlinear optical properties of GeS2-Sb2S3-CsCl glasses. The value of Eopt increases and the third-order optical nonlinearity decreases with increasing CsCl content. Decreasing lone-pair electron and broadening the band-gap will provide less transition paths for nonlinear process, which play a key role in ultrafast third-order nonlinear optical responses of these chalcohalide glasses.A series of alkali halide doped chalcohalide glasses （100-x）（0.9GeS2-0.1Sb2S3）-xCsCl （x=5, 10, 15 and 20 mole fraction） were prepared. The absorption spectra and Raman scatting spectra of these glasses were measured. The optical band gaps Eopt were obtained from ultraviolet absorption edges. Z-scan technique was utilized to investigate the third-order nonlinear optical properties of GeS2-Sb2S3-CsCl glasses. The value of Eopt increases and the third-order optical nonlinearity decreases with increasing CsCl content. Decreasing lone-pair electron and broadening the band-gap will provide less transition paths for nonlinear process, which play a key role in ultrafast third-order nonlinear optical responses of these chalcohalide glasses.

关 键 词：Optical band gap Microstructural units Optical nonlinearity Chalcohalide glasses 

分 类 号：O614.115[理学—无机化学] TN304.25[理学—化学]