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Experimental cross-polarization detection of coupling far-field light to highly confined plasmonic gap modes via nanoantennas

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arxiv 1102.4168 v2 pith:SXBRTZKO submitted 2011-02-21 physics.optics

Experimental cross-polarization detection of coupling far-field light to highly confined plasmonic gap modes via nanoantennas

classification physics.optics
keywords far-fieldmodesplasmonicconfinedcouplingdetectionhighlylight
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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