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Nano Lett. 2008 Oct;8(10):3155-9. doi: 10.1021/nl801396r. Epub 2008 Sep 13.

Direct near-field optical imaging of higher order plasmonic resonances.

Author information

1
Max Planck Institut fur Festk├Ârperforschung, 70569 Stuttgart, Germany. ruben.esteban@em2c.ecp.fr

Abstract

We map in real space and by purely optical means near-field optical information of localized surface plasmon polariton (LSPP) resonances excited in nanoscopic particles. We demonstrate that careful polarization control enables apertureless scanning near-field optical microscopy (aSNOM) to image dipolar and quadrupolar LSPPs of the bare sample with high fidelity in both amplitude and phase. This establishes a routine method for in situ optical microscopy of plasmonic and other resonant structures under ambient conditions.

PMID:
18788785
DOI:
10.1021/nl801396r
[Indexed for MEDLINE]

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