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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2024, Volume 119, Issue 3, Pages 180–186
DOI: https://doi.org/10.31857/S1234567824030054 (Mi jetpl7145) 		 
OPTICS AND NUCLEAR PHYSICS

Two-electron scenario of high-order harmonics generation by atom in an intense infrared field and attosecond pulse

A. A. Romanovab, A. A. Silaeva, N. V. Vvedenskiiacb, M. V. Frolovcb

a Gaponov-Grekhov Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, 603950 Russia
b Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, 603950 Russia
c Voronezh State University, Voronezh, 394018 Russia
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DOI: https://doi.org/10.31857/S1234567824030054
Abstract: The two-electron scenario is proposed for the high-order harmonic generation (HHG) by an atom interacting with an intense infrared field and attosecond pulse. The two-electron dynamics involved in the proposed scenario is realized for the specific attosecond pulse, which can excite the resonance between the valence and deeper shells. Within the numerical solution of the time-dependent Kohn–Sham equations, we analyze the contribution of the single [Phys. Rev. A 98, 063433 (2018)] and two-electron scenarios of HHG by decreasing the duration of attosecond pulse having carrier frequency detuned from the atomic resonance. Favorable conditions are formulated for the realization of a two-electron scenario, which causes the enhancement of the harmonic yield in the spectral range exceeding the cutoff energy of the HHG spectrum in the infrared field.
Funding agency Grant number
Russian Science Foundation 20-11-20289
This work was supported by the Russian Science Foundation (project no. 20-11-20289).
Received: 23.11.2023
Revised: 08.12.2023
Accepted: 08.12.2023
English version:
Journal of Experimental and Theoretical Physics Letters, 2024, Volume 119, Issue 3, Pages 179–185
DOI: https://doi.org/10.1134/S0021364023603950
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: A. A. Romanov, A. A. Silaev, N. V. Vvedenskii, M. V. Frolov, “Two-electron scenario of high-order harmonics generation by atom in an intense infrared field and attosecond pulse”, Pis'ma v Zh. Èksper. Teoret. Fiz., 119:3 (2024), 180–186; JETP Letters, 119:3 (2024), 179–185
Citation in format AMSBIB
\Bibitem{RomSilVve24}
\by A.~A.~Romanov, A.~A.~Silaev, N.~V.~Vvedenskii, M.~V.~Frolov
\paper Two-electron scenario of high-order harmonics generation by atom in an intense infrared field and attosecond pulse
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2024
\vol 119
\issue 3
\pages 180--186
\mathnet{http://mi.mathnet.ru/jetpl7145}
\crossref{https://doi.org/10.31857/S1234567824030054}
\edn{https://elibrary.ru/srxirm}
\transl
\jour JETP Letters
\yr 2024
\vol 119
\issue 3
\pages 179--185
\crossref{https://doi.org/10.1134/S0021364023603950}
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