Dresden 2020 – scientific programme
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O: Fachverband Oberflächenphysik
O 50: Poster Session - Plasmonics and Nanooptics: Fabrication and Characterization
O 50.12: Poster
Tuesday, March 17, 2020, 18:15–20:00, P2/EG
Micro-ellipsometric Investigation of Ordered Plasmonic Nanostructures — •Jia Tang1, Ilya Milekhin2, Fang Dai1, Eugene Bortchagovsky3, Dietrich R. T. Zahn2, and Monika Fleischer1 — 1Institute for Applied Physics, Eberhard Karls Universität Tübingen — 2Semiconductor Physics, Technische Universität Chemnitz — 3V. Lashkarev Institute of Semiconductor Physics of NAS of Ukraine
Nanoparticles of metals have size-dependent optical properties different from the corresponding bulk materials. Such properties originating from the ability of their conduction electrons to sustain collective oscillations known as plasmons, are key ingredients in applications including surface-enhanced spectroscopies, chemo- and bio-sensing, and holographic techniques. Here the interparticle interactions in plasmonic structures are focused on. Systems with strong coupling of localized modes or localized and propagating plasmons demonstrate hybridization of resonances. The main aim of this work is to investigate the influence of geometrical parameters and the form-factor of lattices on the plasmonic and optical properties by high spatial resolution ellipsometric measurements. This technique makes it possible to obtain detailed geometric as well as amplitude and phase information about the coupled systems, providing a better insight into the hybridization of plasmon modes. In this presentation, extinction spectroscopy and imaging spectroscopic ellipsometry with high spatial resolution are employed to investigate ordered metal-insulator-metal (MIM) nanostructures, which are prepared by electron beam lithography.