title: Mid-infrared optical nonlinearities of chalcogenide glasses in Ge-Sb-Se ternary system.
abstract: Optical nonlinearities of chalcogenide glasses in the Ge-Sb-Se ternary system are investigated at mid-infrared wavelengths (2000 and 2500 nm) with femtosecond Z-scan technique. Strong nonlinear refraction in the chalcogenide glasses is observed at 2000 nm, due to three-photon absorption resonance. In addition, the variation in the nonlinear refraction (γ) of the Ge-Sb-Se glasses shows two jumpoints as mean co-ordination number (MCN) approaches 2.4 or 2.7, consistent with the theoretical predication.
authors.forename: Shixun
authors.initials: S
authors.lastname: Dai
authors.forename: Feifei
authors.initials: F
authors.lastname: Chen
authors.forename: Yinsheng
authors.initials: Y
authors.lastname: Xu
authors.forename: Zhe
authors.initials: Z
authors.lastname: Xu
authors.forename: Xiang
authors.initials: X
authors.lastname: Shen
authors.forename: Tiefeng
authors.initials: T
authors.lastname: Xu
authors.forename: Rongping
authors.initials: R
authors.lastname: Wang
authors.forename: Wei
authors.initials: W
authors.lastname: Ji