Berlin 2012 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 35: Poster Session II (Polymeric biomolecular films; Nanostructures; Electronic structure; Spin-orbit interaction; Phase transitions; Surface chemical reactions; Heterogeneous catalysis; Particles and clusters; Surface magnetism; Electron and spin dynamics; Surface dynamics; Methods; Electronic structure theory; Functional molecules)

O 35.26: Poster

Dienstag, 27. März 2012, 18:15–21:45, Poster B

Coupling of plasmons to molecular excitons — •Hongdan Yan¹, Peter Lemmens¹, Johannes Ahrens², Martin Bröring², Sven Burger³, Gerhard Lilienkamp⁴, Winfried Daum⁴, Ulrich Krieg⁵, Herbert Pfnür⁵, Fatih Kalkan⁵, Karina Morgenstern⁵, Aidin Lak⁶, and Meinhard Schilling⁶ — ¹IPKM, TU-BS, Braunschweig, Germany — ²IAAC, TU-BS, Braunschweig, Germany — ³ZIB, Berlin, Germany — ⁴IEPT, TU Clausthal, Germany — ⁵FKP, LU Hannover, Germany — ⁶EMG, TU-BS, Braunschweig

We investigate plasmon/molecule interaction using Au nanowire arrays that have strongly polarized plasmonic modes. The energy of the longitudinal mode is tuned by varying the aspect ratio of the nanowires. A coupling to molecular excitons is evident from an analysis of the lineshape of the optical absorption. Theoretical modelling of the plasmonic spectrum confirms our experimental findings. Work supported by B-IGSM and NTH School for Contacts in Nanosystems.