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This article is cited in 5 scientific papers (total in 5 papers)
Extremely strong fields and ultrashort optical pulses
Selective excitation and creation of population inversion in quantum systems using unipolar attosecond and terahertz pulses
R. M. Arkhipovabc, M. V. Arkhipovab, A. V. Pakhomovb, M. O. Zhukovab, A. N. Tsypkinb, 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
Abstract:
The possibility of selective population of the energy levels of quantum systems using a single unipolar subcycle pulse and a pair of pulses has been studied. The possibility of selective population of quantum levels has been clearly illustrated based on the numerical solution of a system of equations for the density matrix of a three-level medium that interacts with a pair of subcycle attosecond and terahertz pulses. The possibility of creating a population inversion in a three-level medium using a pair of such pulses has been shown. The dynamics of population gratings in a three-level medium exposed to the action of a pair of Gaussian pulses of large amplitude on the system is studied. Whereas the shape of the gratings in a weak field is harmonic, according to analytical calculations performed by the perturbation theory, in the case of a strong field, the spatial profile of the gratings may differ from the sinusoidal profile and may have a complex structure of peaks.
Keywords:
attosecond pulses, subcycle pulses, terahertz pulses, unipolar pulses.
Received: 22.07.2020 Revised: 22.07.2020 Accepted: 10.08.2020
Citation:
R. M. Arkhipov, M. V. Arkhipov, A. V. Pakhomov, M. O. Zhukova, A. N. Tsypkin, N. N. Rosanov, “Selective excitation and creation of population inversion in quantum systems using unipolar attosecond and terahertz pulses”, Optics and Spectroscopy, 128:12 (2020), 1905–1911; Optics and Spectroscopy, 129:1 (2021), 120–126
Linking options:
https://www.mathnet.ru/eng/os232 https://www.mathnet.ru/eng/os/v128/i12/p1905
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