Regensburg 2022 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 35: Poster Tuesday: Plasmonics and Nanooptics 1
O 35.8: Poster
Dienstag, 6. September 2022, 11:00–13:00, P3
Coupling single epitaxial quantum dots to plasmonic waveguides — •Michael Seidel1, Yuhui Yang2, Saimon Covre da Silva3, Thorsten Schumacher1, Armando Rastelli3, Stephan Reitzenstein2, and Markus Lippitz1 — 1Experimental Physics III, University of Bayreuth, Germany — 2Institute of Solid State Physics, TU Berlin, Germany — 3Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Austria
Integrated plasmonic nanocircuits are highly promising building blocks for future quantum optical applications. In combination with self-assembled epitaxially grown GaAs quantum dots as stable, bright and narrow-band single-photon sources, ultra-compact nanocircuits operating below the diffraction limit can be designed [1]. A crucial aspect is the coupling of the quantum dot emission into plasmonic waveguide modes. In this work, we demonstrate the coupling of a single near-surface GaAs quantum dot to a silver nanowire by introducing a 100nm thick dielectric spacer layer. We characterize the nanostructure by comparing different imaging methods involving low-temperature cathodoluminescence and photoluminescence as well as confocal laser reflection mapping. Supported by 3D numerical simulations, we find that resonant plasmonic wires can enhance the waveguide coupling efficiency.
[1] Wu et al., Nano Lett. 2017, 17, 7, 4291-4296