This article is cited in 1 paper

Extremely strong fields and ultrashort optical pulses

Generation of unipolar pulses of terahertz radiation with a large electric area

M. V. Arkhipov^a, R. M. 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: A physical situation is proposed and theoretically analyzed, in which, in our opinion, it is possible to generate unipolar terahertz pulses with a large electric area. In this case, the gas in the tube is excited by a femtosecond IR laser pulse. In this case, the tube with gas is placed in a constant external electric field. The generation of a unipolar pulse is based on “three-step scheme” – ionization of gas atoms by a femtosecond pulse, subsequent acceleration of a free electron in a dc external field and subsequent annihilation of an electron upon collision with a tube wall or another atom (ion).

Keywords: unipolar pulses, ultrafast optics, electric pulse area, terahertz radiation, three-step model.

Received: 18.05.2022
Revised: 18.05.2022
Accepted: 01.06.2022

DOI: 10.21883/OS.2022.08.52908.3703-22

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