International Conference "Ultrafast Optical Phenomena" (UltrafastLight-2022), October 03-07, 2022, Moscow
Laser physics and laser optics

Analytical calculation of free-electron current density at low-order harmonics of ionizing elliptically polarized laser pulse in the presence of a static electric field

A. A. Silaev^ab, A. A. Romanov^ba, N. V. Vvedenskii<sup>ab

a</sup> Federal Research Center A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, 603950 Nizhny Novgorod, Russia
^b National Research Lobachevsky State University of Nizhny Novgorod, 603950 Nizhny Novgorod, Russia

Abstract: The paper presents the derivation of an analytical expression for the current density of free electrons excited during tunneling gas ionization by an elliptically polarized pulse in the presence of a static electric field. The analytical calculation of the spectral components of the current density at the low-order odd and even harmonics of the laser pulse is in good agreement with the results of the numerical simulation.

Keywords: laser pulse, ionization, plasma, low-order harmonics generation, detection of terahertz and midinfrared radiation.

Received: 01.12.2022
Revised: 19.12.2022
Accepted: 28.01.2023

DOI: 10.21883/OS.2023.02.55001.13-23

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