Rostock 2019 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 4: Atomic systems in external fields

A 4.4: Vortrag

Montag, 11. März 2019, 11:30–11:45, S HS 3 Physik

Topological effects in high-harmonic generation by planar sheets — •Helena Drüeke and Dieter Bauer — Institute of Physics, University of Rostock, 18051 Rostock, Germany

The vacant terrain between traditional strong-field attosecond and condensed matter physics is currently explored with an increasing effort both experimentally and theoretically. As topological effects play an important role in modern condensed matter physics, questions about their consequences for typical strong-field observables such as high-harmonic spectra naturally arise. Recently, we investigated the simplest system with topological edge states in a laser field (i.e., linear chains, [1,2]) and found huge differences in the harmonic yield from different topological phases. We now extend this work towards 2D materials. We are interested in the strong-field laser-driven transport along the edges and its signatures in high-harmonic spectra. We use time-dependent density functional theory, as it is not clear a priori whether the common tight-binding models are applicable for strong fields.

[1] Dieter Bauer and Kenneth K. Hansen, High-harmonic generation in solids with and without topological edge states, Phys. Rev. Lett. 120, 177401 (2018)

[2] Helena Drüeke and Dieter Bauer, (manuscript in preparation)