Hannover 2013 – scientific programme
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A: Fachverband Atomphysik
A 17: Interaction with strong or short laser pulses II
A 17.4: Talk
Tuesday, March 19, 2013, 15:00–15:15, B 302
Signatures of Interchannel Interactions in the High-Harmonics Spectrum of Krypton and Xenon -- An Ab-Initio Study — •Stefan Pabst1,2, Arina Sytcheva1, and Robin Santra1,2 — 1Center for Free-Electron Laser Science, DESY, Notkestrasse 85, 22607 Hamburg — 2Department of Physics, University of Hamburg, Jungiusstrasse 9, 20355 Hamburg
We investigate the relevance of multiorbital effects during high-harmonic generation (HHG) in krypton and xenon with an ab-initio time-dependent configuration-interaction singles (TDCIS) approach. With this approach, we are studying many-body effects in the presence of a strong laser field from first principle. We show that spin-orbit splitting within the outermost p-shell and the electronic dynamics within theses shells is reflected the HHG spectrum. Also the giant dipole resonance in xenon is studied where the strong resonance involving the 4d shell influences the recombination of the field-driven photoelectron with the 5p hole. The direct contribution of the 4d shell to the HHG yield is, however, negligibly small. This work has been supported by the DFG under Grant No. SFB 925/A5.