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HL: Fachverband Halbleiterphysik

HL 23: Ultra-fast phenomena

HL 23.2: Talk

Tuesday, March 17, 2020, 09:45–10:00, POT 112

Ultrafast Laser Excitation of ZnO: A First-Principles Study — •Xiao Chen and Silvana Botti — Institut für Festkörpertheorie und -optik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany

Laser device miniaturization is a focused area of nano optics, and ZnO nanowire lasers are attracting large interest in this context. ZnO is a well studied gain medium, and the faceted cylindrical geometry of ZnO nanowires forms a waveguide cavity. Recent experiments [1] focused on the pumping phase, and more specifically the multi-photon absorption and tunneling regimes. In this presentation, we discuss first-principles calculations of electronic excitations in ZnO, driven by strong lasers. These simulations were realized using time-dependent density functional theory, implemented in the open source code Octopus [2].

[1] R. Hollinger et al. Nano Lett. 19, 6, 3563 (2019).

[2] X. Andrade et al., Phys. Chem. Chem. Phys, 17 31371 (2015)