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O: Fachverband Oberflächenphysik

O 75: Plasmonics and Nanooptics

O 75.13: Poster

Mittwoch, 18. März 2015, 18:15–21:00, Poster A

Characterization of Single Gold Nanoparticles Using Confocal Interference Microscopy in Combination with Cylindrical Vector Beams — •Otto Hauler, Frank Wackenhut, Tina Züchner, and Alfred J. Meixner — 1Eberhard-Karls-Universität Tübingen, Institut für physikalische Chemie, 72076 Tübingen, Germany

By using confocal interference microscpoy in combination with cylindrical vector beams it is possible to directly image the orientation and to detect the shape of single metal nanoparticles, with sizes well beyond the diffraction limit [1,2]. Metal nanoparticles can be imaged by detecting both their luminescence and the elastically scattered light. In the scattering detection mode the visualized pattern strongly depends on the local environment, e.g. the refractive index of the surrounding medium [3]. By shifting the resonance of the particles via coupling e.g. to a flat gold film and simultaneously measuring the luminescence and the elastic scattered signal we can further analyze the scattering properties. [1] A.V. Failla, H. Qian, H. Qian, A. Hartschuh, A. J. Meixner (2006), Nano Lett. 6, 1374. [2] T. Züchner, A. V. Failla, A. J. Meixner (2008), J. Microsc. 229, 337. [3] T. Züchner, A. V. Failla, M. Steiner, A. J. Meixner (2008), Opt. Expr. 16, 14635.