SKM 2023 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 75: Focus Session: Ultrafast Dynamics in Nanostructures I
O 75.3: Vortrag
Donnerstag, 30. März 2023, 11:15–11:30, GER 38
Ultrafast electron dynamics in semiconductor nanowires — •Jan Vogelsang1,2, Lukas Wittenbecher1, Cord L. Arnold1, Anne L'Huillier1, and Anders Mikkelsen1 — 1Department of Physics, Lund University, 221 00 Lund, Sweden — 2present address: Institut für Physik, Universität Oldenburg, 26129 Oldenburg, Germany
The dynamics and, in particular, the transport of charge carriers in semiconductor nanostructures after optical excitation are influenced by different processes whose interaction is not yet fully understood. Here, we employ ultrashort laser pulses in combination with a photoemission electron microscope (PEEM) to spatiotemporally resolve these processes. We observe the radial transport of charge carriers in semiconductor nanowires after impulsive optical excitation and investigate the influence of electron-hole scattering on the relaxation times of hot electrons. We conclude with a glimpse on an attosecond streaking experiment in a PEEM promising an even higher temporal resolution.