Plasma mechanisms of pulsed terahertz radiation generation

We present the results on generating terahertz radiation in the plasma of an optical discharge arising in the atmosphere during the focusing of femtosecond laser radiation. Different generation schemes related to focusing of the optical radiation by spherical and axicon lenses, with a constant elect...

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Bibliographic Details
Published inRadiophysics and quantum electronics Vol. 52; no. 7; pp. 482 - 493
Main Authors Akhmedzhanov, R. A., Ilyakov, I. E., Mironov, V. A., Suvorov, E. V., Fadeev, D. A., Shishkin, B. V.
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.07.2009
Subjects
Astronomy
Astrophysics and Astroparticles
Hadrons
Heavy Ions
Lasers
Mathematical and Computational Physics
Nuclear Physics
Observations and Techniques
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Quantum Optics
Theoretical
Terahertz Radiation
Optical Radiation
Optical Pulse
Polarization Distribution
Directivity Pattern
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Summary:We present the results on generating terahertz radiation in the plasma of an optical discharge arising in the atmosphere during the focusing of femtosecond laser radiation. Different generation schemes related to focusing of the optical radiation by spherical and axicon lenses, with a constant electric field imposed on the laser spark region, as well as with the use of bichromatic laser radiation, are studied. Directivity patterns and polarization distributions of the terahertz radiation are analyzed in detail for different generation techniques. Comparison with the experimental results obtained by other research groups is given. Possible nonlinear mechanisms of the terahertz radiation generation are discussed.
ISSN:0033-8443
1573-9120
DOI:10.1007/s11141-009-9155-6