19 November 2014 Aperture-SNOM reveals plasmonic magnetic near-fields (presentation video)
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We report mapping of the lateral magnetic near-field distribution of plasmonic resonant modes in different nanostructure geometries by hollow-pyramid probe aperture-SNOM. Using full-field simulations we investigate how the near-field probe acts as a confined light source and how it efficiently excites surface plasmons. This excitation occurs at lateral magnetic field maxima, enabling the visualization of the lateral magnetic near-field distribution with subwavelength spatial resolution. Our approach complements the available methods for imaging the different field components of light. [1] D. Denkova, N. Verellen et al., ACS nano 7(4), 3168-3176 (2013). [2] D. Denkova, N. Verellen et al., Small, accepted (2013).
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Niels Verellen, Niels Verellen, Denitza Denkova, Denitza Denkova, Alejandro V. Silhanek, Alejandro V. Silhanek, Ventsislav K. Valev, Ventsislav K. Valev, Pol Van Dorpe, Pol Van Dorpe, Victor V. Moshchalkov, Victor V. Moshchalkov, "Aperture-SNOM reveals plasmonic magnetic near-fields (presentation video)", Proc. SPIE 9169, Nanoimaging and Nanospectroscopy II, 91690J (19 November 2014); doi: 10.1117/12.2062595; https://doi.org/10.1117/12.2062595

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