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Experimental verification of the spectral shift between near- and far-field peak intensities of plasmonic infrared nanoantennas

AuthorsAlonso-González, Pablo ; Albella, Pablo ; Neubrech, Frank; Huck-Iriart, Cristián; Chen, Jianing; Golmar, Federico; Casanova, Félix; Hueso, Luis E.; Pucci, Annemarie; Aizpurua, Javier ; Hillenbrand, Rainer
Issue Date2013
PublisherAmerican Physical Society
CitationPhysical Review Letters 110: 203902 (2013)
AbstractTheory predicts a distinct spectral shift between the near- and far-field optical response of plasmonic antennas. Here we combine near-field optical microscopy and far-field spectroscopy of individual infrared-resonant nanoantennas to verify experimentally this spectral shift. Numerical calculations corroborate our experimental results. We furthermore discuss the implications of this effect in surface-enhanced infrared spectroscopy. © 2013 American Physical Society.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.110.203902
Identifiersdoi: 10.1103/PhysRevLett.110.203902
issn: 0031-9007
e-issn: 1079-7114
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