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DS: Fachverband Dünne Schichten

DS 42: Poster I: Progress in Micro- and Nanopatterning: Techniques and Applications (jointly with O); Spins in Organic Materials; Ion Interactions with Nano Scale Materials; Organic Electronics and Photovoltaics; Plasmonics and Nanophotonics (jointly with HL and O); High-k and Low-k Dielectrics (jointly with DF); Organic Thin Films; Nanoengineered Thin Films; Layer Deposition Processes; Layer Properties: Electrical, Optical, and Mechanical Properties; Thin Film Characterisation: Structure Analysis and Composition; Application of Thin Films

DS 42.118: Poster

Mittwoch, 16. März 2011, 15:00–17:30, P1

Plasmon-Polariton modes of dense Au nanowire arrays — •Hongdan Yan¹, Peter Lemmens¹, Dirk Wulferding¹, Mehmet Fatih Cetin¹, Sabine Tornow², Gertrud Zwicknagl², Ulrich Krieg³, Herbert Pfnür³, Winfried Daum⁴, Gerhard Lilienkamp⁴, and Meinhard Schilling⁵ — ¹IPKM, TU-BS, Braunschweig, Germany — ²IMP, TU-BS, Braunschweig, Germany — ³IFP, LU Hannover, Germany — ⁴IEPT, TU Clausthal, Germany — ⁵EMG, TU-BS, Braunschweig, Germany

Using optical absorption and other techniques we study plasmon-polariton modes of dense Au nanowire arrays as function of geometrical parameters and coupling to molecular degrees of freedom. For this instance we electrochemically deposit Au nanowires in porous alumina with well controlled morphology and defect concentration. Transverse and longitudinal modes are observed in the absorption spectra resulting from the anisotropic plasmonic structure. The longitudinal mode shows a blue shift of energy with increasing length of the wires due to the more collective nature of this response. We compare our observations with model calculations and corresponding results on 2D Ag nanowire lattices.

Work supported by IGSM and NTH.