Regensburg 2013 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 74: Quantum dots: Optical properties
HL 74.6: Vortrag
Donnerstag, 14. März 2013, 11:00–11:15, H16
Tailoring the optical properties of single semiconductor quantum dots with metallic planar- and nano-structures — •Hongyi Zhang1,3, Klas Lindfors1,3, Yongheng Huo2, Armando Rastelli2, Oliver G. Schmidt2, Harald Giessen1,3, and Markus Lippitz1,3 — 1Max Planck Institute for Solid State Research — 2Institute for Integrative Nanosciences, IFW- Dresden — 34th Physics Institute, University of Stuttgart
Coupling plasmonic nanostructures with single quantum emitters is of high interest for both fundamental research and a wide range of applications such as ultra-bright non-classical photon sources. The luminescence properties of the emitter can be significantly modified because of the localized electromagnetic field close to the metal nanostructures.
We have studied the optical properties of single GaAs/AlGaAs QDs at different distances to a gold mirror. Both the luminescence intensity and the recombination rate of the QDs were enhanced because of coupling to surface plasmons. We have also investigated the influence of optical antenna on the luminescence of the QDs. With the help of a state of the art positioning technique, we positioned gold nanorods above single QDs and observed significant modification of the emission properties, which manifests the coupling between the QD and localized plasmons. We have also taken first steps to fabricate plasmonic nanocavities for the self-assembled GaAs QDs.