META 2021, META'12

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Nanofocusing of mid-infrared light with antennas and transmission lines
R. Hillenbrand

Last modified: 2011-12-05


We show that mid-infrared light can be focused to nanoscale spots (“hot spots”) by employing plasmonic antenna structures and transmission lines. Employing scattering-type scanning near-field microscopy, we are able to map the vectorial field distribution of nanoscale hot spots in antenna gaps, as well as mid-infrared energy transport and compression in tapered transmission lines.