CSCL EFFECTED ULTRAFAST THIRD-ORDER OPTICAL NONLINEARITIES OF GES_2-SB_2S_3 CHALCOGENIDE GLASSES

• 来源期刊: 材料科学技术(英文版)
• 学科: 工学
• 年，卷（期）: 2009,（6）
• 页码范围: 772-776
• 页数: 5页
• 分类号: TQ171.1
• 语种: 中文

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.