Berlin 2018 – scientific programme
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O: Fachverband Oberflächenphysik
O 66: Plasmonics and nanooptics: Applications and other aspects II
O 66.4: Talk
Wednesday, March 14, 2018, 15:45–16:00, MA 041
Niobium as Alternative Material for Refractory Plasmonics and Hydrogen Sensing — •Shahin Bagheri1, Nikolai Strohfeldt1, Audrey Berrier2, Michael Merker3, Gunter Richter4, Michael Siegel3, and Harald Giessen1 — 14 Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany — 21 Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany. — 3Institute of Micro- and Nanoelectronic Systems, Karlsruhe Institute of Technology (KIT), Hertzstraße 16, 76187 Karlsruhe, Germany — 4Max-Planck-Institut für Intelligente Systeme, D-70589 Stuttgart, Germany
Niobium is mainly known as a superconductive material, however, it exhibits similar plasmonic properties of noble metals such as gold. We utilize electron beam lithography combined with a plasma etching technique to fabricate nanoantenna arrays of Niobium. Tailoring of the Niobium antenna geometry enables precise tuning of the plasmon resonances from the near to the mid-infrared spectral range. The hydrogen absorptivity as well as high-temperature stability of the antennas has additionally been investigated. Great advantages of Niobium such as superconductivity, high-temperature stability, and hydrogen absorptivity, make Niobium highly attractive for plasmonic devices in the near future.