Origins of Very-Low and Zero-Energy Electron Structures in Strong-Field Ionization with Intense Mid-IR Pulses

Synopsis Intense long wavelength (λ ≥ 2 μm) laser pulses enable experiments in the tunneling ionization regime (γ < 1) and reveal surprising low electron energy features, which can not be described with the strong-field approximation (SFA). These features, universal for all target species, includ...

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Bibliographic Details
Published in:Journal of physics. Conference series 2015-09, Vol.635 (5), p.52055
Main Authors: Wolter, B, Lemell, C, Baudisch, M, Pullen, M G, Tong, X-M, Hemmer, M, Senftleben, A, Sclafani, M, Schröter, C D, Ullrich, J, Moshammer, R, Burgdörfer, J, Biegert, J
Format: Article
Language:English
Subjects:
Electron energy
Field ionization
Physics
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Summary:Synopsis Intense long wavelength (λ ≥ 2 μm) laser pulses enable experiments in the tunneling ionization regime (γ < 1) and reveal surprising low electron energy features, which can not be described with the strong-field approximation (SFA). These features, universal for all target species, include the low-energy structure (LES), the very-low-energy structure (VLES) and the zero-energy structure (ZES). Using full 3D electron-ion coincidence detection in combination with our ultrafast 160 kHz mid-IR source, we reveal the entire 3D momentum spectrum well below 1 eV. Quantum and classical simulations allow for an interpretation of the LES, VLES and of the newly identified ZES.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/635/5/052055