Theory of high-harmonic generation in solids

23rd International Laser Physics Workshop

McDonald, C.R.^1 ; Vampa, G.^1 ; Orlando, G.^1 ; Corkum, P.B.^1 ; Brabec, T.^1

Department of Physics, University of Ottawa, Ottawa

ON

K1N 6N5, Canada^1

关键词: Bulk crystals;    Dephasing time;    Dominant mechanism;    Driving field;    High harmonic generation;    Midinfrared lasers;    Physical interpretation;    Two-band model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/594/1/012021/pdf
DOI  :  10.1088/1742-6596/594/1/012021

来源: IOP

【 摘 要 】

High-harmonic generation (HHG) in bulk crystals exposed to intense mid-infrared lasers with photon energies below the bandgap is investigated theoretically. A three dimensional, two-band model that considers both interband and intraband currents is used. It is shown that the interband current is the dominant mechanism for HHG in solids. A physical interpretation of interband HHG-similar to atomic HHG-is provided by saddle point analysis. The effects of dephasing time and driving field wavelength on the harmonic specrum are investigated.