Dresden 2009 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 46: Hybrid systems
HL 46.2: Vortrag
Donnerstag, 26. März 2009, 12:45–13:00, POT 151
Coupling of self assembled Quantum Dots with nanoantennas — •Markus Pfeiffer1,2, Markus Lippitz1,2, Harald Giessen1,2, Lijuan Wang1, Armando Rastelli3, and Oliver G. Schmidt3 — 1Max Planck Institut für Festkörperforschung, Stuttgart — 24. Phys. Institut, Universität Stuttgart — 3Institute for Integrative Nanosciences, IFW Dresden
The interaction between electronic and photonic systems on the nanoscale has attracted much interest in recent years. Important issues are the increase of the coupling efficiency of single quantum systems to light with optical nanoantennas and the differently modified radiative and nonradiative decay rates of this localized excitation. As particle plasmons in metal nanostructures (MNS) show a strong coupling to the light field, they seem to be promising candidates for this purpose. Here, we try to engineer the emission properties of excitations in self assembled GaAs QDs.
For the experimental investigation of the emission properties, we use a detection scheme with two fast avalanche photo diodes for polarization dependent time correlated single photon counting (TCSPC). Characterization of many single QDs with random distances (10 to 170nm) to resonant MNS shows a variation of the radiative decay rate of QD-excitons by the local field enhancement.
We will further demonstrate our results for preparation and characterization of well defined single Quantum Dot-Nanoantenna pairs.