Dresden 2011 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 66: Plasmonics and Nanooptics VI
O 66.1: Vortrag
Donnerstag, 17. März 2011, 11:15–11:30, WIL A317
Nano-plasmonics with single epitaxial quantum dots — •Markus Pfeiffer1,2, Klas Lindfors1,2, Christian Wolpert1,2, Paola Atkinson3, Armando Rastelli3, Oliver G. Schmidt3, Harald Giessen2, and Markus Lippitz1,2 — 1Max Planck Institute for Solid State Research — 24. Physikalisches Intitut, Universität Stuttgart — 3Institute for Integrative Nanosciences Dresden
Plasmon resonant metal structures are a particularly interesting choice to alter the emission properties of single quantum emitters since the electromagnetic field can be significantly modified close to the metal surface. This offers exciting possibilities in both fundamental light-matter studies as well as in applications.
We have experimentally investigated the influence of gold nanostructures on the photoluminescence properties of individual semiconductor quantum dots (QDs). The quantum dots are epitaxially grown GaAs/AlGaAs QDs which are buried a few nanometers beneath the semiconductor surface. The position of these emitters can be determined with high precision from a characteristic feature in the surface topography above each dot.
We have studied the enhancement of the excitation rate of single quantum dots using spherical gold nanoparticles. We observe enhancement factors up to 8 on resonance. We furthermore demonstrate significant differences between the enhancement spectrum and the far-field scattering spectrum of the antennas. We have also taken first steps towards incorporating single QDs in integrated plasmonic circuits.