Ultrafast Spatiotemporal Dynamics of Terahertz Generation by Ionizing Two-Color Femtosecond Pulses in Gases

Journal Article · Fri Jul 30 04:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.053903· OSTI ID:21410953

Babushkin, I ^[1]; Kuehn, W; Reimann, K; Woerner, M; Herrmann, J; Elsaesser, T ^[2]; Koehler, C ^[3]; Skupin, S ^[3]; Berge, L ^[4]

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1. Weierstrass-Institut fuer Angewandte Analysis und Stochastik, 10117 Berlin (Germany)
2. Max-Born-Institut fuer Nichtlineare Optik und Kurzzeitspektroskopie, 12489 Berlin (Germany)
3. Max Planck Institute for the Physics of Complex Systems, 01187 Dresden (Germany)
4. CEA-DAM, DIF, 91297 Arpajon (France)

We present a combined theoretical and experimental study of spatiotemporal propagation effects in terahertz (THz) generation in gases using two-color ionizing laser pulses. The observed strong broadening of the THz spectra with increasing gas pressure reveals the prominent role of spatiotemporal reshaping and of a plasma-induced blueshift of the pump pulses in the generation process. Results obtained from (3+1)-dimensional simulations are in good agreement with experimental findings and clarify the mechanisms responsible for THz emission.

• OSTI ID: 21410953
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 5 Vol. 105; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COLOR
EMISSION
FLUIDS
FOUR-DIMENSIONAL CALCULATIONS
GASES
LASERS
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PHYSICAL PROPERTIES
PLASMA
PULSES
SPECTRA