Low-Energy Peak Structure in Strong-Field Ionization by Mid-Infrared Laser Pulses
1 Institute for Theoretical Physics, Vienna University of Technology, Wiedner Haupstr. 8-10, A-1040 Vienna, Austria
2 Department of Physical Science and Applications, Hellenic Army Academy, Vari, Greece
3 National Hellenic Research Foundation, Inst. of Theoretical and Physical Chemistry, Athens, Greece
4 Institute for Astronomy and Space Physics, IAFE (FCEN-UBA Conicet) Buenos Aires, Argentina
5 Institute of Materials Science, University of Tsukuba, Ibaraki 305-8573, Japan
6 Photonics Institute, Vienna University of Technology, Gusshausstr. 27, A-1040 Vienna, Austria
Using a quasiclassical approach, we demonstrate that the formation of the low-energy structure in above-threshold ionization spectra by intense, midinfrared laser pulses originates from a two-dimensional focusing of the strong-field dynamics in the energy-angular-momentum plane. We show that the low-energy structure is very sensitive to the carrier-envelope phase of the laser field.
© Owned by the authors, published by EDP Sciences, 2013
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