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  • Title: Mapping magnetic near-field distributions of plasmonic nanoantennas.
    Author: Denkova D, Verellen N, Silhanek AV, Valev VK, Van Dorpe P, Moshchalkov VV.
    Journal: ACS Nano; 2013 Apr 23; 7(4):3168-76. PubMed ID: 23464670.
    Abstract:
    We present direct experimental mapping of the lateral magnetic near-field distribution in plasmonic nanoantennas using aperture scanning near-field optical microscopy (SNOM). By means of full-field simulations it is demonstrated how the coupling of the hollow-pyramid aperture probe to the nanoantenna induces an effective magnetic dipole which efficiently excites surface plasmon resonances only at lateral magnetic field maxima. This excitation in turn affects the detected light intensity enabling the visualization of the lateral magnetic near-field distribution of multiple odd and even order plasmon modes with subwavelength spatial resolution.
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