Topological effects in high-harmonic generation by planar sheets

Previous studies [1,2] have found interesting topological effects in the high-harmonic generation (HHG) spectra of finite, one-dimensional, periodic structures. This research expands upon these results by investigating a two-dimensional system with topological edge states. Calculations were performed with a self-consistent time-dependent density functional theory (TDDFT) approach. [1] Dieter Bauer and Kenneth K. Hansen, \emph{High-harmonic generation in solids with and without topological edge states}, Phys. Rev. Lett. 120, 177401 (2018) [2] Helena Dr\"ueke and Dieter Bauer, \emph{Robustness of topologically sensitive harmonic generation in laser-driven linear chains}, arXiv:1901.01437