Dresden 2017 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 86: New Materials
HL 86.2: Vortrag
Freitag, 24. März 2017, 09:45–10:00, POT 112
Combined Control Mechanisms of the Interatomic Coulombic Electron Capture in Paired Quantum Dots — •Axel Molle1, Essam Radwan1, Sascha Bubeck1, Federico Manuel Pont2, and Annika Bande1 — 1Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Berlin, Germany — 2Universidad Nacional de Córdoba, and IFEG-CONICET, Córdoba, Argentina
Ultrafast Interatomic Coulomb Electron Capture (ICEC) is a process in which a species A is capturing a free electron. This is mediated by long-range Coulomb-interaction with a bound electron in a neighbouring species B in such a way that the transferred energy releases the bound electron of species B into the continuum.
First predicted for atoms and molecules, ICEC has been established as an important energy-transfer process in paired-quantum-dot systems [1] .
It was shown that semiconductor material variations signify one of the important control mechanisms for the ICEC process. Additionally, a related energy transfer-process in quantum dots was found to be controllable by the geometries of both neighbouring quantum dots [2] .
In this work, both effects are combined to understand the coupling of those two control mechanisms and predict advantageous experimental setups of the paired-quantum-dot system, underlining that ICEC proves to be a potential candidate for future energy-selective devices.
[1] F. M. Pont et al., J. Phys. Condens. Matter 28, 075301 (2016).
[2] P. Dolbundalchok et al., J. Comput. Chem. 37, 2249 (2016).