3D numerical simulations of THz generation by two-color laser filaments

3D numerical simulations of THz generation by two-color laser filaments

Terahertz (THz) radiation produced by the filamentation of two-color pulses over long distances in argon is numerically investigated using a comprehensive model in full space-time-resolved geometry. We show that the dominant physical mechanism for THz generation in the filamentation regime at clampi...

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Veröffentlicht in:Physical review letters 2013-02, Vol.110 (7), p.073901-073901, Article 073901
Hauptverfasser: Bergé, Luc, Skupin, Stefan, Köhler, Christian, Babushkin, Ihar, Herrmann, Joachim
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container_issue 7
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container_title Physical review letters
container_volume 110
creator Bergé, Luc
Skupin, Stefan
Köhler, Christian
Babushkin, Ihar
Herrmann, Joachim
description Terahertz (THz) radiation produced by the filamentation of two-color pulses over long distances in argon is numerically investigated using a comprehensive model in full space-time-resolved geometry. We show that the dominant physical mechanism for THz generation in the filamentation regime at clamping intensity is based on quasi-dc plasma currents. The calculated THz spectra for different pump pulse energies and pulse durations are in agreement with previously reported experimental observations. For the same pulse parameters, near-infrared pump pulses at 2  μm are shown to generate a more than 1 order of magnitude greater THz yield than pumps centered at 800 nm.
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title 3D numerical simulations of THz generation by two-color laser filaments
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