Au nanotip as luminescent near-field probe.
basic_science · Level V
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- Record sourced from PubMed, PMID 23815414.
- Also identified by DOI 10.1021/nl401173g.
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Abstract
We introduce a new optical near-field mapping method, namely utilizing the plasmon-mediated luminescence from the apex of a sharp gold nanotip. The tip acts as a quasi-point light source which does not suffer from bleaching and gives a spatial resolution of ≤25 nm. We demonstrate our method by imaging the near field of azimuthally and radially polarized plasmonic modes of nonluminescent aluminum oligomers.