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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. König11Institute 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.

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