Regensburg 2016 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 24: Plasmonics and Nanooptics: Fabrication, Characterization and Applications

O 24.1: Poster

Montag, 7. März 2016, 18:15–20:30, Poster E

Resonant energy-transfer in plasmonic hybrid arrays — •Julian Sindram, Joseph P. S. Fitzgerald, and Matthias Karg — Physical Chemistry I, University of Bayreuth, Bayreuth, Germany

Energy transfer between plasmonic nanoparticles (NPs) and fluorophores drastically alter the spectral response of the involved species and can be harnessed to create plasmonic nanolasers. Such lasers can be nanoscopic sources of coherent light with high potential for many applications in the field of nano-optics. Energy transfer rates depend on various parameters, including the NP material and size, the optical properties of the fluorophore, the distance between NPs and fluorophores and the concentration of fluorophores. In order to achieve a better understanding of energy transfer processes, a screening of numerous parameter combinations is necessary.

We present a new and efficient approach, allowing us to prepare and analyze large parameter sets on a single substrate. A bottom-up preparation procedure is used to fabricate substrate supported silver NP arrays with a spatial gradient of particle sizes. These plasmonic arrays are embedded in a fluorophore host matrix. Position-dependent steady-state and time resolved fluorescence spectroscopy, as well as extinction spectroscopy, are employed to examine energy transfer.