title: Wavefront control to generate ultraviolet supercontinuum by filamentation of few-cycle laser pulses in argon.
abstract: We numerically demonstrated the filamentation dynamics of a 6 fs, 800 nm pulse focused in argon at atmospheric pressure by a zone plate and a concave mirror. In comparison with a concave mirror, the zone plate has a frequency-dependent focal length and can be used to control the wavefront of the laser beam in the frequency domain. A separate supercontinuum in the ultraviolet region extending from 250 to 300 nm and peaked at ~280 nm can be generated by using a proper zone plate.
authors.affiliation: State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences, P.O. Box 800-211, Shanghai 201800, China.
authors.forename: Zhanxin
authors.initials: Z
authors.lastname: Wang
authors.forename: Jiansheng
authors.initials: J
authors.lastname: Liu
authors.forename: Ruxin
authors.initials: R
authors.lastname: Li
authors.forename: Zhizhan
authors.initials: Z
authors.lastname: Xu