4.8 Article

Conical forward THz emission from femtosecond-laser-beam filamentation in air

Journal

PHYSICAL REVIEW LETTERS
Volume 98, Issue 23, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.98.235002

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We attribute a strong forward directed THz emission from femtosecond laser filaments in air to a transition-Cherenkov emission from the plasma space charge moving behind the ionization front at light velocity. Distant targets can be easily irradiated by this new source of THz radiation.

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