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This article is cited in 7 scientific papers (total in 7 papers)
Extremely strong fields and ultrashort optical pulses
Generation of an attosecond pulse in helium excited by half-cycle X-ray pulses
R. M. Arkhipovabc, M. V. Arkhipovab, I. Babushkinde, A. V. Pakhomovb, N. N. Rosanovbc a Saint Petersburg State University
b St. Petersburg National Research University of Information Technologies, Mechanics and Optics
c Ioffe Institute, St. Petersburg
d Institute of Quantum Optics, Leibniz University of Hannover, Hannover, Germany
e Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering-Innovation across Disciplines), Hannover, Germany
Abstract:
Conventionally, attosecond pulses are obtained using generation of high-order optical harmonics upon excitation of various media by femtosecond laser pulses with the central frequency in the infrared range. Here, we consider theoretically an alternative possibility of obtaining an isolated extreme ultraviolet (XUV) attosecond pulse in a thin layer of helium atoms excited by a pair of half-cycle (quasi-unipolar) X-ray pulses. The approach is based on the free polarization decay of an atomic medium. An analogy of the processes under consideration with the phenomenon of superradiance is discussed.
Keywords:
attosecond pulses, X-ray pulses, unipolar pulses, helium atom, superradiance.
Received: 13.12.2019 Revised: 13.12.2019 Accepted: 23.12.2019
Citation:
R. M. Arkhipov, M. V. Arkhipov, I. Babushkin, A. V. Pakhomov, N. N. Rosanov, “Generation of an attosecond pulse in helium excited by half-cycle X-ray pulses”, Optics and Spectroscopy, 128:4 (2020), 541–547; Optics and Spectroscopy, 128:4 (2020), 529–535
Linking options:
https://www.mathnet.ru/eng/os438 https://www.mathnet.ru/eng/os/v128/i4/p541
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