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O: Fachverband Oberflächenphysik

O 36: Plasmonics and Nanooptics

O 36.6: Poster

Dienstag, 17. März 2015, 18:15–21:00, Poster A

Development and construction of an aperturless Scanning Nearfield Optical Microscope — •Jonas Albert, Matthias Brandstätter, and Markus Lippitz — Experimentalphysik III, Universität Bayreuth

We are interested in mapping optical fields of nanoobjects such as plasmonic structures. For that purpose we built an aperturless Scanning Nearfield Optical Microscope (aSNOM), to combine spatial resolution of an AFM with optical information. In a first step we built an "open" AFM with optical access to the tip,while still keeping a high stability of the system in sight. Our AFM shows vertical sub-nanometer resolution with the possibility to illuminate sample and tip from the side and the bottom. In a second step the optical near field detection system is installed. With an Michelson-type interferometric detection we gain signal amplification plus optical phase information. For background suppression a cross-polarization scheme is implemented to get optimal signal-to-noise ratio.