Similarity of angular distribution for THz radiation emitted by laser filament plasma channels of different lengths

The influence of plasma channel length on an angular terahertz (THz) radiation distribution is experimentally studied for the channel formed under filamentation of an ultrashort laser pulse. It is shown that the angular distribution of the THz emission depends only on laser intensity in the filament...

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Bibliographic Details
Published in:Optics letters 2020-07, Vol.45 (14), p.4009-4011
Main Authors: Koribut, Andrey V., Rizaev, Georgy E., Mokrousova, Daria V., Savinov, Sergey A., Reutov, Aleksei A., Mityagin, Yury A., Seleznev, Leonid V., Ionin, Andrey A.
Format: Article
Language:English
Subjects:
Angular distribution
Emission
Lasers
Plasma
Plasma density
Radiation distribution
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Summary:The influence of plasma channel length on an angular terahertz (THz) radiation distribution is experimentally studied for the channel formed under filamentation of an ultrashort laser pulse. It is shown that the angular distribution of the THz emission depends only on laser intensity in the filament and plasma density of the plasma channel and does not depend on the plasma channel length. A qualitative explanation of the THz emission screening by the filament plasma channel is proposed.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.394377