Strong coupling of surface plasmon polaritons and ensembles of dye molecules

Optics Express
T U TumkurM A Noginov

Abstract

We demonstrate the strong coupling of dye molecules to surface plasmon polaritons (SPPs) excited in the Kretschmann geometry and propagating at the interface of silver and dye-doped polymer. The dispersion curve of such a system, studied in the reflectometry experiments, is split into three branches and demonstrates an avoided crossing - the signature of a strong coupling. We have further studied the excitation spectra of the dye emission and found that the positions of the excitation peaks have a good match with the points in the dispersion curve determined by the reflectometry. At the same time, the analysis of the spectra of the plasmon-mediated spontaneous emission, decoupled to the prism and acquired at multiple collection angles, has resulted in a quite different dispersion curve exhibiting a non-trivial splitting into multiple branches. This suggests that the same plasmonic environment couples differently to absorbing and emitting dye molecules.

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Citations

Oct 30, 2016·Accounts of Chemical Research·Thomas W Ebbesen
Dec 30, 2017·Physical Review Letters·David HagenmüllerGuido Pupillo
Nov 10, 2016·Optics Express·V N PetersM A Noginov
Mar 17, 2018·The Journal of Physical Chemistry Letters·Gary BeaneGregory V Hartland

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