• Medientyp: Sonstige Veröffentlichung; Bericht; E-Book
  • Titel: 3D numerical simulations of THz generation by two-color laser filaments
  • Beteiligte: Bergé, Luc [Verfasser:in]; Skupin, Stefan [Verfasser:in]; Köhler, Christian [Verfasser:in]; Babushkin, Ihar [Verfasser:in]; Herrmann, Joachim [Verfasser:in]
  • Erschienen: Weierstrass Institute for Applied Analysis and Stochastics publication server, 2012
  • Sprache: Englisch
  • DOI: https://doi.org/10.20347/WIAS.PREPRINT.1752
  • Schlagwörter: 35Q60 ; 52.25.Os ; 42.65.Jx ; 78A60 ; THz light generation -- Photoionization -- Ultrashort pulse propagation ; 32.80.Fb ; 35Q61 ; 52.38.Hb ; article
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  • Beschreibung: 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~$\mu$m are shown to generate a more than one order of magnitude larger THz yield than pumps centered at 800 nm.