Stuttgart 2012 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 45: SYPC: From Atoms to Photonic Circuits 2
Q 45.3: Vortrag
Donnerstag, 15. März 2012, 15:00–15:15, V47.01
Controlled coupling of single solid-state quantum emitters to optical antennas — •Markus Pfeiffer1,2, Klas Lindfors1,2, Paola Atkinson3, Armando Rastelli3, Oliver Schmidt3, Harald Giessen2, and Markus Lippitz1,2 — 1Max Planck Institute for Solid State Research, Stuttgart, Germany — 2University of Stuttgart, Stuttgart, Germany — 3IFW Dresden, Dresden, Germany
Plasmonic structures combined with stable solid-state quantum emitters are a promising approach to integrated photonic circuits and quantum optics applications. One of the main challenges in realizing such structures is the controlled positioning of single plasmonic structures next to a single emitter. To address this challenge, we have developed an electron-beam lithography based technique that enables fabrication of nanostructures aligned with respect to single self-assembled semiconductor quantum dots with nanometer precision.
We have applied our fabrication method to couple excitons in single quantum dots with plasmons in rod-shaped optical antennas. The plasmon-exciton coupling is manifested as a significant change in the polarization state of the photoluminescence. We investigate the strength of the coupling as a function of the position of the quantum dot with respect to the antenna. We observe large variations in the polarization properties of the luminescence as the quantum dot is placed at different positions in the vicinity of an antenna.