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APS » Journals » Phys. Rev. Lett. » Volume 99 » Issue 13
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Phys. Rev. Lett. 99, 135002 (2007) [4 pages]

Terahertz Radiation Source in Air Based on Bifilamentation of Femtosecond Laser Pulses

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Y. Liu, A. Houard, B. Prade, S. Akturk, and A. Mysyrowicz*
Laboratoire d’Optique Appliquée, ENSTA, Ecole Polytechnique, Teramobile project, CNRS UMR 7639, Palaiseau, 91761, France

V. T. Tikhonchuk
Centre Lasers Intenses et Applications, Université Bordeaux 1; CNRS; CEA, UMR 5107, Talence, 33405 France

Received 11 June 2007; published 25 September 2007

See accompanying Physics Focus

A new terahertz (THz) source in air based on the bifilamentation of femtosecond laser pulses is reported. This THz radiation is 1 order of magnitude more intense than the transition-Cherenkov THz emission from femtosecond laser filaments reported recently and shows different angular and polarization properties. We attribute it to the emission from a bimodal transmission line created by two plasma filaments.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.135002
DOI:
10.1103/PhysRevLett.99.135002
PACS:
52.59.Ye, 41.60.−m, 52.25.Os, 52.38.Hb

*andre.mysyrowicz@ensta.fr.

 
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