Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 25: Plasmonics and nanooptics: Light-matter interaction, spectroscopy II
O 25.7: Vortrag
Dienstag, 13. März 2018, 12:00–12:15, MA 041
Size dependence of coupling strength in hybrid plasmon-exciton nanoparticles — •Felix Stete1,2, Phillip Schossau1, Wouter Koopman1, and Matias Bargheer1,3 — 1Institut für Physik & Astronomie, Universität Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany — 2Humboldt-Universität zu Berlin, School of Analytical Sciences Adlershof (SALSA), Unter den Linden 6, 10099 Berlin, Germany — 3Helmholtz Zentrum Berlin, Albert-Einstein-Str. 15, 12489 Berlin, Germany
The coupling strength in plasmon-exciton core-shell nanoparticles is mostly measured by tuning the plasmon resonance and subsequently fitting the resulting anticrossing relation. However,the plasmon tuning is usually induced by changing the particle size or shape. In this case an investigation of the size dependence of the coupling strength is not possible.
We tune the plasmon resonance via layer-by-layer deposition of polyelectrolytes and thus without changing the size or shape of the particles [1]. With this technique we investigate plasmon-exciton nanorods of different sizes to reveal a strong dependence of the coupling strength on the particle size. For small nanoparticles the coupling becomes very strong and single emitter strong coupling is within reach.
[1] F. Stete et al., ACS Photonics, 4, 1669-1676, 2017