Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 7: Nano-Optics (Microscopy and Plasmonics)
Q 7.2: Talk
Monday, March 9, 2020, 14:30–14:45, a310
Coherent plasmonics: a single molecule makes a plasmonic nanoparticle more transparent — •Johannes Zirkelbach1, Jan Renger1, Tobias Utikal1, Stephan Götzinger1,2, and Vahid Sandoghdar1,2 — 1Max Planck Institute for the Science of Light, Erlangen, Germany — 2Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
A plasmonic nanoparticle creates a strong extinction shadow detectable in transmission. We demonstrate that a single molecule placed in the near-field of a plasmonic particle can substantially reduce this extinction shadow, making the plasmonic particle more transparent. To achieve this, we prepare a thin molecular crystal doped with dibenzoterrylene (DBT) molecules on a nanostructured array of gold nanoantennas at liquid helium temperature. We then select individual molecules through high-resolution laser spectroscopy and investigate their near-field coupling to nearby gold nanoantennas by recording both extinction and fluorescence excitation spectra. We present a quantitative analysis of the observed spectral lines and comparison with an analytical model, revealing a coherent interaction between the light fields scattered from a molecule and a gold nanoparticle [1].
[1] J. Zirkelbach, et al., in preparation.