title: Dynamics of femtosecond laser filamentation in argon with non-uniform density distribution.
abstract: We numerically investigated the femtosecond laser filamentation in a cell filled with argon of non-uniform density distribution. By comparison with the case of uniform density distribution, we demonstrated the crucial differences in the dynamics between the two cases. We found that the pulse-splitting appeared earlier due to the sensitivity of rear-part refocusing to the plasma density and a double Λ shape appeared in the spatio-temporal intensity profile in the non-uniform density case.
authors.affiliation: School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China. michaeljs_liu@mail.siom.ac.cn
authors.forename: Zhanxin
authors.initials: Z
authors.lastname: Wang
authors.forename: Chaojin
authors.initials: C
authors.lastname: Zhang
authors.forename: Jiansheng
authors.initials: J
authors.lastname: Liu
authors.forename: Zhizhan
authors.initials: Z
authors.lastname: Xu
mesh_terms: D001128:Argon / Q000737:chemistry*; D003198:Computer Simulation; D007834:Lasers; D008962:Models, Theoretical; D012542:Scattering, Radiation
chemical_list: D001128:Argon