Polarization-resolved near-field mapping of plasmonic aperture emission by a dual-SNOM system.

Klein, Angela E; Janunts, Norik; Steinert, Michael; Tünnermann, Andreas; Pertsch, Thomas · Nano Lett · 2014

basic_science · Level V

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Abstract

We study the polarization characteristics of light emission and collection in the near field by the tips of a Dual-SNOM (two scanning near-field optical microscopes) setup. We find that cantilevered fiber probes can serve as emitters of polarized light, or as polarization-sensitive detectors. The polarization characteristics depend on the fiber type used for tip fabrication. In Dual-SNOM measurements, we demonstrate mapping of different field components of the plasmonic dipole pattern emitted by an aperture probe.