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O: Fachverband Oberflächenphysik

O 23: Plasmonics and Nanooptics: Light-Matter Interaction, Spectroscopy

O 23.15: Poster

Monday, March 7, 2016, 18:15–20:30, Poster E

Tip modified spectroscopy of nanowires — •Jonas Albert and Markus Lippitz — Universität Bayreuth

We are investigating 1D structures such as CdSe nanowires and wire-like molecular aggregates with an apertureless Scanning Near-field Optical Microscope (aSNOM). The optical fields at the near-field probe, a metal coated AFM-tip, are confined in a space much smaller than the wavelength and therefore showing a high field gradient on the nanometer scale. Utilising this near-field interaction we aim for modification of fluorescence emission by the presence of the near-field probe. Next to simple quenching we expect the optical field gradients to enhance dipole forbidden higher-order transitions.