Erlangen 2018 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 23: Resonant Energy Transfer and Interatomic Coulombic Decay II

MO 23.5: Vortrag

Freitag, 9. März 2018, 11:30–11:45, PA 1.150

Approaches to the Interatomic Coulombic Decay in neutral quantum dots — •Martin Lützner and Annika Bande — Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner Platz 1, 14109 Berlin, Germany

The interatomic Coulomb decay (ICD) is an ultrafast, radiationless energy transfer process between atoms and molecules. In ICD an electron in an innervalence state of an atom deexcites by transferring energy to an electron in another atom. This causes the second electron to leave the neighbouring atom if the excitation energy of the first atom lies above the ionization threshold of the second one. Recent theoretical investigations predicted ICD happening in a system of two neighbouring charged semiconductor Quantum Dots (QD).

In the current description of charged QDs electronically excited intraband states were considered. Since excitonic states are more long-lived and play a major role in the optical properties of semiconductors, it is desirable to describe neutral quantum dots. In this talk an approach on the description of ICD in neutral QDs will be given. The holes in this model are regarded as static pointlike particles. Furthermore the effects of Coulomb screening on the carrier dynamics is investigated.

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