Journal
OPTICAL MATERIALS EXPRESS
Volume 1, Issue 5, Pages 1009-1018Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.1.001009
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Scanning transmission electron microscopy in combination with electron energy-loss spectroscopy is a powerful tool for the spatial and spectral characterization of the plasmonic modes of lithographically defined photonic meta-atoms. As an example, we present a size dependence study of the resonance energies of the plasmonic modes of a series of isolated splitring resonators. Furthermore, we show that the comparison of the plasmonic maps of a split-ring resonator and the corresponding complementary splitring resonator allows a direct visualization of Babinet's principle. Our experiments are in good agreement with numerical calculations based on a discontinuous Galerkin time-domain approach. (C) 2011 Optical Society of America
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