Regensburg 2013 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 58: Poster Session III (Solid-liquid interfaces; Scanning probe and other methods; Electronic structure theory; Spin-orbit interaction)
O 58.56: Poster
Mittwoch, 13. März 2013, 18:15–21:45, Poster B1
Fabrication of gold nanocone near-field scanning microscope probes — •Omar Tanirah1, Alexander Weber-Bargioni2, Stefano Cabrini2, Dieter P. Kern1, and Monika Fleisher1 — 1Institute for Applied Physics, Eberhard Karls University Tübingen, Auf der Morgenstelle 10, 72076 Tübingen, Germany — 2Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
Gold nanostructures have fascinating plasmonic properties. Hence, they are promising for a vast field of cutting edge nanophotonics technology. Our special interest is focused on developing near-field scanning optical microscopy (NSOM) probes by combining scanning probes with gold nanostructures. NSOM probes with plasmonic nanocones are expected to enable simultaneously ultrahigh resolution spectroscopy and topography measurements [1]. This is possible since the nanocone has an outstanding shape which can restrict the localized surface plasmon to subwavelength dimensions. Here, we report the fabrication of gold nanocones on top of both atomic force microscope (AFM) cantilevers and optical fibre tips. The fabrication method depends mainly on focused ion beam, electron beam induced deposition, and ion milling techniques. This method provides precise control over size and shape of the gold nanocones, and accordingly their plasmonic properties. Their optical properties were investigated by means of dark field spectroscopy, and their morphology was studied using AFM and scanning electron microscopy. Results of both fabrication and characterization will be shown. [1] M. Fleischer et al., ACS Nano 5, 2570 (2011).