Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 28: Plasmonics and Nanooptics IV: Light-Matter Interaction
O 28.6: Vortrag
Dienstag, 21. März 2017, 11:45–12:00, TRE Ma
The detection of attenuated waveguide modes in SiO2 on silicon covered with gold-nanoparticles using photo emission electron microscopy — •Alwin Klick1, René Wagner1, Malte Großmann1, Laith F. Kadem2, Jost Adam3, Till Leißner3, Horst-Günter Rubahn3, Christine Selhuber-Unkel2, and Michael Bauer1 — 1Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel — 2Institut für Materialwissenschaft, Christian-Albrechts-Universität zu Kiel — 3Mads Clausen Instituttet, Syddansk Universitet
We present a time-resolved photoemission electron microcopy study of propagating electromagnetic modes in the UV spectral regime in SiO2 covered with self-assembled gold nanospheres on a silicon substrate. Comparison with simulations using the finite element method confirms that guided light modes in the SiO2 slab are detected. Furthermore, we show that the gold nanospheres play a key role in the observation of guided modes using PEEM due to their high electron density substantially enhancing the detected photoemission yield. Analytic calculations which take into account the size of the nanospheres and their distribution on the surface show that plasmonic interactions have negligible impact on the light mode properties.