title: Enhancement and broadening of extreme-ultraviolet supercontinuum in a relative phase controlled two-color laser field.
abstract: We experimentally demonstrate the generation of an extreme-ultraviolet (XUV) supercontinuum in argon with a two-color laser field consisting of an intense 7 fs pulse at 800 nm and a relatively weak 37 fs pulse at 400 nm. By controlling the relative time delay between the two laser pulses, we observe enhanced high-order harmonic generation as well as spectral broadening of the supercontinuum. A method to produce isolated attosecond pulses with variable width and intensity is proposed.
authors.affiliation: State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Acaedmy of Sciences, Shanghai, China.
authors.forename: Yinghui
authors.initials: Y
authors.lastname: Zheng
authors.forename: Zhinan
authors.initials: Z
authors.lastname: Zeng
authors.forename: Xiaofang
authors.initials: X
authors.lastname: Li
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Chen
authors.forename: Peng
authors.initials: P
authors.lastname: Liu
authors.forename: Hui
authors.initials: H
authors.lastname: Xiong
authors.forename: Hui
authors.initials: H
authors.lastname: Lu
authors.forename: Shitong
authors.initials: S
authors.lastname: Zhao
authors.forename: Pengfei
authors.initials: P
authors.lastname: Wei
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.forename: Zhiguang
authors.initials: Z
authors.lastname: Wang
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.forename: Ya
authors.initials: Y
authors.lastname: Cheng
authors.forename: Ruxin
authors.initials: R
authors.lastname: Li
authors.forename: Zhizhan
authors.initials: Z
authors.lastname: Xu