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Updated: Jun 19, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
Shaping the spatiotemporal dynamics of the electron density in a hybrid metal-semiconductor nanostructure
Matthias Reichelt1, Torsten Meier
1Department of Physics, University of Paderborn, Warburger Strasse 100, D-33098 Paderborn, Germany. matthias.reichelt@uni-paderborn.de
Abstract:
A one-dimensional semiconductor nanostructure is locally excited through a metal aperture. It is shown that the electron density can be coherently localized at desired spatial and temporal positions by using nontrivially shaped laser pulses. To obtain the optimized laser field, Bloch equations for a tight-binding model system are solved together with a genetic pulse-shaping algorithm. Full three-dimensional finite-difference time-domain (FDTD) simulations of the Maxwell-Bloch equations confirm the predicted coherent spatiotemporal control.
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