Berlin 2024 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 38: Nonequilibrium Quantum Systems 2 (joint session TT/DY)
DY 38.13: Vortrag
Donnerstag, 21. März 2024, 12:45–13:00, H 3025
Interference effects in high-harmonic generation from Dirac materials — •Wolfgang Hogger1, Vanessa Junk1, Alexander Riedel1, Cosimo Gorini2, Angelika Knothe1, Juan-Diego Urbina1, and Klaus Richter1 — 1Institute for theoretical physics, University of Regensburg, Germany — 2Université Paris-Saclay, CEA, CNRS, SPEC, 91191, Gif-sur-Yvette, France
The study of high-harmonic generation (HHG) in solids by virtue of intense laser pulses provides a fascinating platform to study ultra- fast electron dynamics as well as material properties. We theoretically investigate HHG on the basis of massive Dirac Fermions, serving as a prototypical model for topologically non-trivial matter and other sys- tems with pseudo-relativistic dispersion[1]. The harmonic emission is calculated using the well-established framework of the Semiconductor- Bloch equations. We found a potentially generic phenomenon of Dirac-like systems, which is a strong interference between inter- and intraband contributions. This interference qualitatively changes the observed spectrum and we investigate its dependence on dimensionless parameters[2] governing the transition dynamics of the system.
[1] C. P. Schmidt et al, Nature 93, 385–390 (2021)
[2] C. Heide, T. Boolakee, T. Higuchi, and P. Hommelhoff Phys. Rev. A 104, 023103, 023103 (2021)