Generation of terahertz radiation in the plasma of optical gas breakdown

A.A. Ushakov^†^a, P.A. Chizhov^‡^a, b, c, V.V. Bukin^a, S.V. Garnov^§^a
^aProkhorov General Physics Institute of the Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, Russian Federation
^bMoscow Institute of Physics and Technology (National Research University), Institutskii per. 9, Dolgoprudny, Moscow Region, 141701, Russian Federation
^cAll-Russian Institute for Scientific and Technical Information of Russian Academy of Sciences, ul. Usiyevicha 20, A-315, Moscow, 125190, Russian Federation

The paper presents the current state of research on the generation of terahertz radiation in the optical breakdown of gases by laser radiation, consisting of the fundamental and second harmonics of femtosecond laser radiation. We consider the main approaches to describing the generation of terahertz radiation. The influence of the focusing mode, spatial and temporal modulation, changes in the wavelength, and polarization state of the pump radiation is shown. Also considered is the influence of the properties of the medium into which laser radiation is focused.

Keywords: femtosecond laser plasma, filamentation, terahertz radiation
PACS: 42.65.−k, 52.38.Hb, 52.59.Ye (all)
DOI: 10.3367/UFNe.2023.10.039579
URL: https://ufn.ru/en/articles/2024/2/d/
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2-s2.0-85189023355
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2024PhyU...67..157U
Citation: Ushakov A A, Chizhov P A, Bukin V V, Garnov S V "Generation of terahertz radiation in the plasma of optical gas breakdown" Phys. Usp. 67 157–170 (2024)

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Received: 11th, August 2023, revised: 6th, October 2023, accepted: 18th, October 2023

Оригинал: Ушаков А А, Чижов П А, Букин В В, Гарнов С В «Генерация терагерцевого излучения в плазме оптического пробоя газов» УФН 194 169–183 (2024); DOI: 10.3367/UFNr.2023.10.039579