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- Title
Control of Spectral and Polarization Properties of Quasiunipolar Terahertz Pulses in Strongly Nonequilibrium Magnetized Plasma Channels.
- Authors
Bogatskaya, Anna V.; Volkova, Ekaterina A.; Popov, Alexander M.
- Abstract
The possibility to control both spectral and polarization properties of seed THz pulses in strongly nonequilibrium elongated magnetized plasma channels formed via intense UV femtosecond laser pulses in nitrogen (air) is analyzed. The physical mechanism of THz pulse control is based on cyclotron resonance, which can strongly reconstruct electrodynamical plasma features and, in particular, its ability to amplify the radiation of different spectral bands and polarization states. In particular, the formation of quasiunipolar pulses with a non-zero electric area and a specific polarization state is discussed. This study is based on the self-consistent solution of the kinetic Boltzmann equation for the electron velocity distribution function (EVDF) in the plasma channel and the second-order wave equation for THz pulse propagation.
- Subjects
NONEQUILIBRIUM plasmas; CYCLOTRON resonance; DISTRIBUTION (Probability theory); ELECTRON distribution; FEMTOSECOND pulses; NITROGEN plasmas; ELECTRIC stimulation
- Publication
Photonics, 2023, Vol 10, Issue 5, p585
- ISSN
2304-6732
- Publication type
Article
- DOI
10.3390/photonics10050585