In recent years much interest has been focused on the high-order harmonic generation (HHG) using high-intensity femtosecond laser pulses, because the HHG provides a promising approach to develop a compact, high-brightness coherent soft X-ray source. The HHG is a typical nonperturbative phenomenon induced by a strong laser field, and the observed harmonics have shown some characteristic behaviors, e.g., representing a broad plateau formation with a sharp cutoff. The detailed interaction process at the high intensity has been studied extensively, and the results have revealed a lot of new physical processes for the HHG. Here we review some fundamental aspects of the HHG, based on our studies concerning the single-atomic response to the strong field, the laser wavelength and intensity dependence of the HHG, competing processes in the interaction, the influence of self-phase modulation, the effect of laser-pulse width on the HHG, and so forth. The laser field used for the HHG is strong enough to induce multiphoton ionization (MPI) or tunneling ionization of atoms and molecules.


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    Titel :

    High-intensity field interaction for the generation of soft X-ray harmonics


    Beteiligte:
    Miyazaki, K. (Autor:in)


    Erscheinungsdatum :

    01.01.1999


    Format / Umfang :

    107471 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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