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O: Fachverband Oberflächenphysik

O 50: Poster Session - Plasmonics and Nanooptics: Fabrication and Characterization

O 50.8: Poster

Dienstag, 17. März 2020, 18:15–20:00, P2/EG

Tailoring energy and dimensionality of plasmonic nanostructures — •Hongdan Yan^1,2, Bo Liu^1,2, Dirk Wulferding^1,2, Frank Ludwig^2,3, and Peter Lemmens^1,2 — ¹IPKM, TU-BS, Braunschweig, Germany — ²LENA, TU-BS, Braunschweig, Germany — ³EMG, TU-BS, Braunschweig, Germany

Novel routes for energy tuning and adaption of surface plasmon resonances within 3-dimensional Au nanowire arrays are presented. Based on a defect management of the substrate (anodic aluminum oxide, AAO) via annealing we demonstrate a tuning of the longitudinal resonance of plasmons towards higher energy [1]. To induce a 3D-1D crossover the Au nanowires are released in a self-controlled etching and annealing process. Optical absorption experiments demonstrate a very efficient coupling to molecular excitons with resulting "plexcitons" [2]. Theoretical modelling of the plasmonic spectrum supports our experimental findings. Work support by QUANOMET-NL4. [1] H. Yan, P. Lemmens, D. Wulferding, J. Shi, K. D. Becker, C. T. Lin, A. Lak, M. Schilling, J. Mat. Chem. Phys. 135, 206 (2012). [2] B. Liu, B. Thielert, A. Reutter, R. Stosch, P. Lemmens, J. Phys. Chem. C 123, 19119 (2019).