Extremely strong fields and ultrashort optical pulses

Comparison of the dynamics of population difference gratings created in a two-level and three-level medium by half-cycle light pulses

R. M. Arkhipov^ab, M. V. Arkhipov^ab, N. N. Rosanov<sup>ab

a</sup> Saint Petersburg State University, 199034 St. Petersburg, Russia
^b Ioffe Institute, 194021 St. Petersburg, Russia

Abstract: Based on the numerical solution of the system of Maxwell–Bloch equations, a comparison is made of the dynamics of the population difference gratings and the polarization of the medium, modeled in the two- and three-level approximation. It is shown that gratings also appear in a three-level medium, but their dynamics are not qualitatively different from a two-level medium with the selected model parameters.

Keywords: population difference gratings, half-cycle pulses, attosecond pulses, coherent effects, two-level medium.

Received: 27.02.2024
Revised: 27.02.2024
Accepted: 14.03.2024

DOI: 10.61011/OS.2024.04.58223.6078-24

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