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arXiv · 1710.04564

High-order harmonic generation in solid slabs beyond the single active electron

Kenneth K. Hansen·Tobias Deffge·Dieter Bauer
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Abstract

High-harmonic generation by a laser-driven solid slab is simulated using time-dependent density functional theory. Multiple harmonic plateaus up to very high harmonic orders are observed already at surprisingly low field strengths. The full all-electron harmonic spectra are, in general, very different from those of any individual Kohn-Sham orbital. Freezing the Kohn-Sham potential instead is found to be a good approximation for the laser intensities and harmonic orders considered. The origins of the plateau cutoffs are explained in terms of band gaps that can be reached by Kohn-Sham electrons and holes moving through the band structure.

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Kenneth K. Hansen, Tobias Deffge, Dieter Bauer. 2017-10-12. High-order harmonic generation in solid slabs beyond the single active electron. https://doi.org/10.1103/physreva.96.053418

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