title: Transient thermal effect, nonlinear refraction and nonlinear absorption properties of graphene oxide sheets in dispersion.
abstract: The nonlinear refraction (NLR) properties of graphene oxide (GO) in N, N-Dimethylformamide (DMF) was studied in nanosecond, picosecond and femtosecond time regimes by Z-scan technique. Results show that the dispersion of GO in DMF exhibits negative NLR properties in nanosecond time regime, which is mainly attributed to transient thermal effect in the dispersion. The dispersion also exhibits negative NLR in picosecond and femtosecond time regimes, which are arising from sp(2)- hybridized carbon domains and sp(3)- hybridized matrix in GO sheets. To illustrate the relations between NLR and nonlinear absorption (NLA), NLA properties of the dispersion were also studied in nanosecond, picosecond and femtosecond time regimes.
authors.affiliation: Key Lab of Advanced Transducers and Intelligent Control System, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China. zhangxiaoliang@tyut.edu.cn
authors.forename: Xiao-Liang
authors.initials: XL
authors.lastname: Zhang
authors.forename: Zhi-Bo
authors.initials: ZB
authors.lastname: Liu
authors.forename: Xiao-Chun
authors.initials: XC
authors.lastname: Li
authors.forename: Qiang
authors.initials: Q
authors.lastname: Ma
authors.forename: Xu-Dong
authors.initials: XD
authors.lastname: Chen
authors.forename: Jian-Guo
authors.initials: JG
authors.lastname: Tian
authors.forename: Yan-Fei
authors.initials: YF
authors.lastname: Xu
authors.forename: Yong-Sheng
authors.initials: YS
authors.lastname: Chen
mesh_terms: D000042:Absorption; D006108:Graphite / Q000737:chemistry* / Q000528:radiation effects; D008027:Light; D008422:Materials Testing; D017711:Nonlinear Dynamics; D010087:Oxides / Q000737:chemistry* / Q000528:radiation effects; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation
chemical_list: D010087:Oxides; D006108:Graphite