Extremely strong fields and ultrashort optical pulses

Self-consistent three-dimensional model of ultrashort terahertz pulse amplification in a laser-induced nonequilibrium plasma channel in xenon

A. V. Bogatskaya^ab, E. A. Volkova^c, A. M. Popov<sup>ab

a</sup> Lomonosov Moscow State University, Faculty of Physics
^b P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow
^c Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics

Abstract: The propagation and amplification of ultrashort terahertz pulses in a nonequilibrium photoionization plasma channel formed in xenon by a powerful femtosecond UV laser pulse is studied in three-dimensional geometry. The study is based on the self-consistent numerical integration of the second-order wave equation in cylindrical geometry and the Boltzmann kinetic equation in the two-term expansion to describe the electron velocity distribution function in the spatially inhomogeneous nonequilibrium plasma of the channel.

Keywords: nonlinear optics, terahertz radiation, nonequilibrium plasma channel, numerical simulation.

Received: 14.09.2022
Revised: 14.09.2022
Accepted: 28.09.2022

DOI: 10.21883/OS.2022.12.54093.48-22

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