Multi-wavelength mid-infrared plasmonic antennas with single nanoscale focal point


Romain Blanchard, Svetlana V. Boriskina, Patrice Genevet, Mikhail A. Kats, Jean-Philippe Tetienne, Nanfang Yu, Marlan O. Scully, Luca Dal Negro, and Federico Capasso. 2011. “Multi-wavelength mid-infrared plasmonic antennas with single nanoscale focal point.” Optics Express, 19, 22, Pp. 22113-22124.


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. (C) 2011 Optical Society of America
Last updated on 05/23/2020