Dresden 2009 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 38: Nano-optics of metallic and semiconducting nanostructures (experiments I)
O 38.6: Vortrag
Mittwoch, 25. März 2009, 16:15–16:30, SCH A216
Fabrication and optoelectronic properties of individual gold nanostructures — •Monika Fleischer1, Sebastian Jäger2, Marcus Sackrow2, Dai Zhang2, Rudolf Ehlich3, Catrinel Stanciu2, J.K. Heinrich Hörber3, Alfred J. Meixner2, and Dieter P. Kern1 — 1Institut für Angewandte Physik, Eberhard Karls Universität Tübingen, Deutschland — 2Institut für Physikalische und Theoretische Chemie, Eberhard Karls Universität Tübingen, Deutschland — 3H.H. Wills Laboratory, University of Bristol, England
When interacting with the electromagnetic field of a focused laser beam, individual gold nanostructures can act as optical antennas. For efficient excitation, the shape and size of the nanostructures need to be adjusted to the applied laser mode and wavelength. Cone structures e.g. are particularly well suited for excitation with a radially polarized beam [1]. In a process based on electron beam lithography and ion milling, individual gold nanostructures are fabricated in a range of different shapes, whose critical dimensions are varied systematically. The structures are characterized by means of confocal microscopy, NSOM, SEM, AFM and STM. Results of these studies are presented together with spectra indicating the shape and size dependent resonance frequencies of the gold structures.
[1] M. Fleischer et al., Appl. Phys. Lett. 93, 111114 (2008).