Auflistung nach Schlagwort "Ionization"

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  • Henkel, Jost; Lein, Manfred; Engel, Volker; Dreissigacker, Ingo (College Park, MD : American Physical Society, 2012)
    By solving the time-dependent Schrödinger equation for atoms in short laser pulses of different polarizations, it is shown that in strong-field ionization without rescattering, the lateral width of the electron-momentum ...
  • Henkel, Jost; Lein, Manfred (College Park, MD : American Physical Society, 2015)
    Two-color ionization of atoms with a strong 800-nm fundamental component and a weak 400-nm component with perpendicular polarization gives detailed insight into the ionization dynamics. When the delay between the two colors ...
  • Chacon, Alexis; Lein, Manfred; Ruiz, Camilo (College Park, MD : American Physical Society, 2014)
    Ionization by an attosecond pulse launches an electron wave packet in the continuum which contains rich information about the pulse, the parent system, and the ionization dynamics. This emission process is not instantaneous ...
  • Martínez, P.G.D.A.; Babushkin, I.; Bergé, L.; Skupin, S.; Cabrera-Granado, E.; Köhler, C.; Morgner, Uwe; Husakou, A.; Herrmann, J. (American Physical Society, 2015)
    Broadband ultrashort terahertz (THz) pulses can be produced using plasma generation in a noble gas ionized by femtosecond two-color pulses. Here we demonstrate that, by using multiple-frequency laser pulses, one can obtain ...
  • Zhao, Jing; Lein, Manfred (College Park, MD : American Physical Society, 2013)
    From the numerical solution of the time-dependent Schrödinger equation, we obtain the times of ionization and return of the laser-driven electron in high-order harmonic generation by probing the dynamics with a second ...
  • Henkel, Jost; Lein, Manfred; Engel, Volker (College Park, MD : American Physical Society, 2011)
    We present quantum-mechanical studies on above-threshold ionization of molecular ions in two and three dimensions. The momentum distributions show signatures of interfering emissions from the molecular centers. These ...
  • Krauss-Varban, D.; Demmig, F. (Cambridge : Cambridge University Press, 1984)
    The ionization relaxation and radiative cooling of weakly unsteady shock waves in krypton and xenon is examined. We find that, besides radiation energy loss, the shock-tube boundary layers and shock attenuation strongly ...
  • Klages, D.; Demmig, F. (Cambridge : Cambridge University Press, 1991)
    Chemical reactions in shock waves can be strongly affected by minute impurity concentrations. Thus it is not adequate to take into account the additional impurity electron production in relaxation studies simply by global ...
  • van der Zwan, Elmar V.; Lein, Manfred (College Park, MD : American Physical Society, 2012)
    Accurate molecular imaging via high-order harmonic generation relies on comparing harmonic emission from a laser-irradiated molecule and an adequate reference system. However, an ideal reference atom with the same ionization ...
  • Liu, Yunquan; Ye, Difa; Liu, Jie; Rudenko, A.; Tschuch, S.; Dürr, M.; Siegel, M.; Morgner, Uwe; Gong, Qihuang; Moshammer, R.; Ullrich, J. (American Physical Society, 2010)
    In kinematically complete studies we explore double ionization (DI) of Ne and Ar in the threshold regime (I>3×1013W/cm2) for 800 nm, 45 fs pulses. The basic differences are found in the two-electron momentum distribution ...
  • Shvetsov-Shilovski, N.I.; Lein, M.; Madsen, L.B.; Räsänen, E.; Lemell, C.; Burgdörfer, J.; Arbó, D.G.; Tkési, K. (Bristol : Institute of Physics Publishing, 2017)
    Synopsis We present a non-perturbative semiclassical model for strong-field ionization that accounts for path interferences of tunnel-ionized electrons in the ionic potential within the framework of a classical trajectory ...
  • Schmitt-Sody, Andreas; Kurz, Heiko G.; Bergé, Luc; Skupin, Stefan; Polynkin, Pavel (Bristol : Institute of Physics Publishing, 2016)
    The propagation of intense picosecond laser pulses in air in the presence of strong nonlinear self-action effects and air ionization is investigated experimentally and numerically. The model used for numerical analysis is ...
  • Pabst, Stefan; Lein, Manfred; Wörner, Hans Jakob (College Park, MD : American Physical Society, 2016)
    Strong-field ionization (SFI) has been shown to prepare wave packets with few-femtosecond periods. Here, we explore whether this technique can be extended to the attosecond time scale. We introduce an intuitive model, which ...
  • Shvetsov-Shilovski, N.I.; Lein, Manfred; Madsen, L.B.; Räsänen, E.; Lemell, C.; Burgdörfer, J.; Arbó, D.G.; Tokési, K. (College Park, MD : American Physical Society, 2016)
    We present a semiclassical two-step model for strong-field ionization that accounts for path interferences of tunnel-ionized electrons in the ionic potential beyond perturbation theory. Within the framework of a classical ...
  • Petersen, Ingo; Henkel, Jost; Lein, Manfred (College Park, MD : American Physical Society, 2015)
    Strong-field ionization of aligned diatomic and polyatomic molecules such as O2, N2, C2H4, and others in circularly polarized laser fields is investigated theoretically. By calculating the emission-angle-resolved lateral ...
  • Liu, Yunquan; Tschuch, S.; Rudenko, A.; Dürr, M.; Siegel, M.; Morgner, Uwe; Moshammer, R.; Ullrich, J. (American Physical Society, 2008)
    Nonsequential double ionization of Ar by 45 fs laser pulses (800 nm) at (4-7)×1013W/cm2 was explored in fully differential measurements. Well below the field-modified recollision threshold we enter the multiphoton regime. ...
  • Brée, C.; Hofmann, M.; Demircan, A.; Morgner, Uwe; Kosareva, O.; Savel'Ev, A.; Husakou, A.; Ivanov, M.; Babushkin, I. (American Physical Society, 2017)
    The ionization rate of an atom in a strong optical field can be resonantly enhanced by the presence of long-living atomic levels (so-called Freeman resonances). This process is most prominent in the multiphoton ionization ...
  • Jürgens, P.; Jupé, M.; Gyamfi, M.; Ristau, Detlev (Bellingham, WA : S P I E - International Society for Optical Engineering, 2016)
    The modeling of the laser-induced damage processes can be divided into thermal and electronic processes. Especially, electronic damage seems to be well understood. In corresponding models, the damage threshold is linked ...