We propose and demonstrate a novel photonic-plasmonic antenna capable of confining electromagnetic radiation at several mid-infrared wavelengths to a single sub-wavelength spot. The structure relies on the coupling between the localized surface plasmon resonance of a bow-tie nanoantenna with the photonic modes of surrounding multi-periodic particle arrays. Far-field measurements of the transmission through the central bow-tie demonstrate the presence of Fano-like interference effects resulting from the interaction of the bow-tie antenna with the surrounding nanoparticle arrays. The near-field of the multi-wavelength antenna is imaged using an aperture-less near-field scanning optical microscope. This antenna is relevant for the development of near-field probes for nanoimaging, spectroscopy and biosensing.
CITATION STYLE
Blanchard, R., Boriskina, S. V., Genevet, P., Kats, M. A., Tetienne, J.-P., Yu, N., … Capasso, F. (2011). Multi-wavelength mid-infrared plasmonic antennas with single nanoscale focal point. Optics Express, 19(22), 22113. https://doi.org/10.1364/oe.19.022113
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