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Phase-Matching Gating for Isolated Attosecond Pulse Generation
Version 1
: Received: 8 September 2023 / Approved: 12 September 2023 / Online: 12 September 2023 (08:56:30 CEST)
A peer-reviewed article of this Preprint also exists.
Strelkov, V.V.; Khokhlova, M.A. Phase-Matching Gating for Isolated Attosecond Pulse Generation. Photonics 2023, 10, 1122. Strelkov, V.V.; Khokhlova, M.A. Phase-Matching Gating for Isolated Attosecond Pulse Generation. Photonics 2023, 10, 1122.
Abstract
We investigate the production of an isolated attosecond pulse (IAP) via the phase-matching gating of high-harmonic generation by intense laser pulses. Our study is based on the integration of the propagation equation for the fundamental and generated fields with nonlinear polarisation found via the numerical solution of the time-dependent Schr\"odinger equation. We study the XUV energy as a function of the propagation distance (or the medium density) and find that the onset of the IAP production corresponds to the change from linear to quadratic dependence of this energy on the propagation distance (or density). Finally, we show that the upper limit of the fundamental pulse duration for which the IAP generation is feasible is defined by the temporal spreading of the fundamental pulse during the propagation. This nonlinear spreading is defined by the difference of the group velocities for the neutral and photoionised medium.
Keywords
schrodinger equation; intense laser field; coherent XUV
Subject
Physical Sciences, Optics and Photonics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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