Terahertz wave emission at an oblique incidence of the laser pulse on rarefied plasma

The terahertz wave packet emission theory is constructed when an s-polarized laser pulse is incident on a semi-infinite plasma whose density is much lower than the critical value. The angular, spectral and energy characteristics of a terahertz pulse are studied as a function of the plasma density, t...

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Bibliographic Details
Published in:Plasma physics and controlled fusion 2020-09, Vol.62 (9), p.95002
Main Author: Frolov, A A
Format: Article
Language:English
Subjects:
emission of terahertz waves
oblique incidence of laser radiation
semi-infinite rarefied plasma
total reflection of the laser pulse
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Summary:The terahertz wave packet emission theory is constructed when an s-polarized laser pulse is incident on a semi-infinite plasma whose density is much lower than the critical value. The angular, spectral and energy characteristics of a terahertz pulse are studied as a function of the plasma density, the angle of incidence and the duration of laser radiation. It is shown that the energy of the terahertz signal has the maximum value for grazing incidence of the laser pulse, when the effect of total reflection of the laser radiation from the plasma boundary takes place.
ISSN:0741-3335
1361-6587
DOI:10.1088/1361-6587/ab97f2