Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 59: Plasmonics and Nanooptics

O 59.17: Poster

Dienstag, 21. März 2017, 18:30–20:30, P2-OG1

Near-field imaging and spectroscopy of hybridized plasmonic nanocavities — •Anna-Katharina Mahro1, Deirdre Kilbane1,2, Michael Hartelt1, Tobias Eul1, Eva Prinz1, Mirko Cinchetti1,3, and Martin Aeschlimann11Physics Department and Research Center OPTIMAS, TU Kaiserslautern, Germany — 2School of Physics, University College of Dublin, Ireland — 3Experimentelle Physik VI, TU Dortmund, Germany

Knowledge of fundamental light-matter interactions such as the spectral response of nanostructures to incident light is necessary for designing plasmonic devices. This response is determined on the nanometer scale (below the diffraction limit of light). To achieve this high spatial resolution we use a photoemission electron microscope (PEEM). It images the near-field distribution of the photoelectrons in a parallel data acquisition scheme.

To gain information about the spectral response, we combine PEEM with a highly tunable femtosecond laser source, in our case an optical parametric oscillator (OPO). We demonstrate the potential of this experimental setup by investigating localized, propagating and hybridized surface plasmons in different arrangements of gold whispering gallery mode antennas (WGM) which are fabricated via focussed ion beam milling (FIB).

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