Ultra-high amplitude isolated attosecond pulses generated in the transmission regime from ultrathin foil

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Pang, Ruyu and Wang, Yunliang and Yan, Xueqing and Eliasson, Bengt (2022) Ultra-high amplitude isolated attosecond pulses generated in the transmission regime from ultrathin foil. Physical Review Applied, 18 (2). 024024. ISSN 2331-7043 (https://doi.org/10.1103/PhysRevApplied.18.024024)

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Abstract

A coherent-synchrotron-emission regime of forward high-order harmonics generation (HHG) is proposed for the emission of an isolated unipolar half-cycle attosecond pulse by a three-color laser pulse impinging on ultrathin foil. A theoretical model is proposed for the electron nanobunching mechanism and the forward radiation, which is consistent with the numerical-simulation results. As the forward HHG does not need to penetrate from the front to the rear side of the target, the spectrum of the forward HHG has no low-frequency cutoff. The robustness of this regime is verified with different laser and foil plasma conditions as well as the two-dimensional effects. The robustness is also checked with similarity theory, which confirms that isolated attosecond pulses can be efficiently generated when the plasma density and the laser amplitude change simultaneously such that their ratio remains unchanged.

ORCID iDs

Pang, Ruyu, Wang, Yunliang, Yan, Xueqing and Eliasson, Bengt ORCID logoORCID: https://orcid.org/0000-0001-6039-1574;
  • Item type:Article
    ID code:81278
    Dates:
    Date
    Event
    9 August 2022
    Published
    22 June 2022
    Accepted
    11 March 2022
    Submitted
    Subjects:Science > Physics > Optics. Light
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:27 Jun 2022 12:51
    Last modified:12 Dec 2024 13:21
    URI:https://strathprints.strath.ac.uk/id/eprint/81278
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