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  • Title: Direct near-field optical imaging of higher order plasmonic resonances.
    Author: Esteban R, Vogelgesang R, Dorfmüller J, Dmitriev A, Rockstuhl C, Etrich C, Kern K.
    Journal: Nano Lett; 2008 Oct; 8(10):3155-9. PubMed ID: 18788785.
    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.
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