Journal
APPLIED PHYSICS LETTERS
Volume 98, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3564904
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We experimentally demonstrate the coupling of far-field light to highly confined plasmonic gap modes via connected nanoantennas. The excitation of plasmonic gap modes is shown to depend on the polarization, position, and wavelength of the incident beam. Far-field measurements performed in crossed polarization allow for the detection of extremely weak signals re-emitted from gap waveguides and can increase the signal-to-noise ratio dramatically. (C) 2011 American Institute of Physics. [doi:10.1063/1.3564904]
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