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Physics of the conical broadband terahertz emission from two-color laser-induced plasma filaments.
- Source :
-
Physical Review A: Atomic, Molecular & Optical Physics . Mar2014, Vol. 89 Issue 3-B, p1-6. 6p. - Publication Year :
- 2014
-
Abstract
- We propose a comprehensive physical model explaining the conical character of broadband terahertz generation from femtosecond two-color laser-induced air plasma filaments. We show, that, in contrast to other models, emission is always conical, resulting from phase matching of the radiation produced inside the filament combined with a partial back reflection of the generated terahertz field from the filament itself due to the frequency-dependent critical plasma density. The obtained conical angle varies from 2° to 10°, depending on the plasma density distribution and filament length. Unlike previously proposed models, our model shows good agreement with our experiments as well as a wide range of experimental findings from the literature. [ABSTRACT FROM AUTHOR]
- Subjects :
- *LASER plasmas
*PLASMA density
*PLASMA physics
*RADIATION
*LASER pulses
Subjects
Details
- Language :
- English
- ISSN :
- 10502947
- Volume :
- 89
- Issue :
- 3-B
- Database :
- Academic Search Index
- Journal :
- Physical Review A: Atomic, Molecular & Optical Physics
- Publication Type :
- Periodical
- Accession number :
- 95642445
- Full Text :
- https://doi.org/10.1103/PhysRevA.89.033838