Dresden 2017 – scientific programme
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O: Fachverband Oberflächenphysik
O 52: Nanostructures at Surfaces: Dots, Particles, Clusters
O 52.5: Poster
Tuesday, March 21, 2017, 18:30–20:30, P1C
Metal-enhanced fluorescence of oriented emitters in plasmonic nanostructures — •Fabian Goßler1, Matthias Stöter2, Thorsten Schumacher3, Markus Lippitz3, Josef Breu2, Andreas Fery1, and Tobias A.F. König1 — 1Institute of Physical Chemistry and Polymer Physics, Leibniz Institute of Polymer Research (IPF), Hohe Str. 6, 01069 Dresden — 2Dept. of Inorganic Chemistry 1, University of Bayreuth, Universitätsstr. 30, 95440 Bayreuth — 3Dept. of Experimental Physics 3, University of Bayreuth, Universitätsstr. 30, 95440 Bayreuth
For implementation of nanophotonic devices, a tunable life-time and controllable enhancement of the spontaneous emission is necessary. We fabricate a gold film coupled anisotropic silver nanocube cavity to systematically study the fluorescence enhancement of oriented fluorophores. For a rational design, the plasmonic properties of the silver nanocubes are designed to match with the emission spectrum of a selected fluorophore. Silicate bilayers with intercalated fluorophores are used as emitting spacer due to their regular height of 4 nm on large scales and orientation of the dye molecules. Finite-difference time-domain (FDTD) simulations, atomic force microscopy (AFM), dark field spectroscopy, confocal and time-resolved photoluminescence measurements have been used to characterize the tailormade nanocavity. Significant emission enhancement and a strong influence on life-times are observed inside the nanocavity. FDTD simulations support the results and demonstrate the potential of this cavity enhancement as building block for application in plasmonic lasers or metamaterials.