Giant Isolated Attosecond Pulses from Two-Color Laser-Plasma Interactions

Y. X. Zhang, S. Rykovanov, Mingyuan Shi, C. L. Zhong, X. T. He, B. Qiao, M. Zepf

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    15 Citations (Scopus)

    Abstract

    A new regime in the interaction of a two-color (ω,2ω) laser with a nanometer-scale foil is identified, resulting in the emission of extremely intense, isolated attosecond pulses-even in the case of multicycle lasers. For foils irradiated by lasers exceeding the blow-out field strength (i.e., capable of fully separating electrons from the ion background), the addition of a second harmonic field results in the stabilization of the foil up to the blow-out intensity. This is then followed by a sharp transition to transparency that essentially occurs in a single optical cycle. During the transition cycle, a dense, nanometer-scale electron bunch is accelerated to relativistic velocities and emits a single, strong attosecond pulse with a peak intensity approaching that of the laser field.

    Original languageEnglish
    Article number114802
    JournalPhysical Review Letters
    Volume124
    Issue number11
    DOIs
    Publication statusPublished - 20 Mar 2020

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