Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 59: Poster Session II (Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: arrays; Nanostructures at surfaces: Wires, tubes; Nanostructures at surfaces: Other; Plasmonics and nanooptics; Metal substrates: Epitaxy and growth; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsoprtion of organic / bio molecules; Metal substrates: Adsoprtion of inorganic molecules; Metal substrates: Adsoprtion of O and/or H; Metal substrates: Clean surfaces; Density functional theory and beyond for real materials)
O 59.49: Poster
Mittwoch, 24. März 2010, 17:45–20:30, Poster B1
Cantilever based Scanning Near Field Optical Microscopy probes as platform for optical antenna sensors — •Bernhard Schaaf1, Marc Salomo1, Jennifer Linden1, Daniela Bayer1, Jens Niegemann2, Michael König2, Christopher Prohm2, Martin Aeschlimann1, Kurt Busch2, and Egbert Oesterschulze1 — 1Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany — 2Institut für Theoretische Festkörperphysik, Universität Karlsruhe, 76128 Karlsruhe, Germany
Scanning Nearfield Optical Microscopy (SNOM) is a powerful tool to investigate the electron dynamics in metallic nanostructures. An AFM cantilever based SNOM probe is presented exploiting a hollow pyramidal tip as platform for the integration of an nano-antenna onto the very tip. As a prerequisite, various types of antennas were fabricated on planar substrates to investigate their spectral resonance behavior. In the next step antennas are placed onto the pyramidal tips using FIB milling as well as e-beam lithography as high precision fabrication tools. The probes aim at the investigation of the excitation of e.g. collective electron oscillations like localized surface plasmons (LSPs). For this purpose, metallic nanostructures are prepared on planar glass or silica substrates. Measurements on the farfield and nearfield performance of the probes and samples as well as coupling of both regimes are presented as function of the impinging field amplitude distribution and the polarization state. Simulations of the spatial as well as temporal field distribution were conducted to get insight in the probe performance and in future also into the coupling of probe and sample.