title: Relativistic single-cycled short-wavelength laser pulse compressed from a chirped pulse induced by laser-foil interaction.
abstract: By particle-in-cell simulation and analysis, we propose a plasma approach to generate a relativistic chirped pulse based on a laser-foil interaction. When two counterpropagating circularly polarized pulses interact with an overdense foil, the driving pulse (with a larger laser field amplitude) will accelerate the whole foil to form a double-layer structure, and the scattered pulse (with a smaller laser field amplitude) is reflected by this flying layer. Because of the Doppler effect and the varying velocity of the layer, the reflected pulse is up-shifted for frequency and chirped; thus, it could be compressed to a nearly single-cycled relativistic laser pulse with a short wavelength. Simulations show that a nearly single-cycled subfemtosecond relativistic pulse can be generated with a wavelength of 0.2 μm after dispersion compensation.
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: L L
authors.initials: LL
authors.lastname: Ji
authors.forename: B F
authors.initials: BF
authors.lastname: Shen
authors.forename: D X
authors.initials: DX
authors.lastname: Li
authors.forename: D
authors.initials: D
authors.lastname: Wang
authors.forename: Y X
authors.initials: YX
authors.lastname: Leng
authors.forename: X M
authors.initials: XM
authors.lastname: Zhang
authors.forename: M
authors.initials: M
authors.lastname: Wen
authors.forename: W P
authors.initials: WP
authors.lastname: Wang
authors.forename: J C
authors.initials: JC
authors.lastname: Xu
authors.forename: Y H
authors.initials: YH
authors.lastname: Yu