This review presents the current state of research on the generation and application of
subfemtosecond (or attosecond, where 1 as $= 10^{-18}\{\text {s}} $) ultraviolet and X-ray …

When intense laser radiation interacts with matter, high-order harmonic generation (HHG)
takes place; recent achievements in this area were reported by the authors in a review [VV …

By experimentally studying high-order harmonic beams generated in gases, we show how
the spatial characteristics of these ultrashort extreme-ultraviolet (XUV) beams can be finely …

Advancing table-top attosecond sources in brightness and pulse duration is of immense
interest and importance for an expanding sphere of applications. Recent theoretical studies …

The efficient generation of the coherent XUV light via frequency conversion of intense laser
drivers is a problem of both fundamental and technological importance. Increasing the …

We develop an approach describing nonlinear-optical processes in the strong-field domain
characterized by the nonperturbative field-with-matter interaction. The polarization of an …

We theoretically analyze the phase-matching of high-order harmonic generation (HHG) in
multi-jet plasmas and find the harmonic orders for which the quasi-phase-matching (QPM) is …

High-harmonic generation—the emission of high-frequency radiation by the ionization and
subsequent recombination of an atomic electron driven by a strong laser field—is widely …

The production of brighter coherent XUV radiation by intense laser pulses through the
process of high-harmonic generation (HHG) is one of the central challenges in …

We study theoretically the effect of giant resonance in Xe on the phase difference between
consecutive resonantly enhanced high-order harmonics and calculate the duration of the …