Open AccessMid-infrared optical nonlinearities of chalcogenide glasses in Ge-Sb-Se ternary system
Author(s) -
Shixun Dai,
Feifei Chen,
Yinsheng Xu,
Zhe Xu,
Xiang Shen,
Tao Xu,
Rongping Wang,
Wei Ji
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.001300
Subject(s) - chalcogenide , materials science , femtosecond , optics , infrared , chalcogenide glass , refractive index , ternary operation , refraction , nonlinear optics , optoelectronics , absorption (acoustics) , laser , physics , computer science , programming language
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.