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arXiv · 1301.5448

Experimental Verification of the Spectral Shift between Near- and Far-Field Peak Intensities of Plasmonic Nanoantennas

P. Alonso-Gonzalez·P. Albella·F. Neubrech·Christian Huck·J. Chen·F. Golmar·F. Casanova·L. E. Hueso·A. Pucci·J. Aizpurua·R. Hillenbrand
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Abstract

Theory predicts a distinct spectral shift between the near- and far-field optical responses 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 (SEIRS).

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P. Alonso-Gonzalez, P. Albella, F. Neubrech, Christian Huck, J. Chen, F. Golmar, F. Casanova, L. E. Hueso, A. Pucci, J. Aizpurua, R. Hillenbrand. 2013-01-23. Experimental Verification of the Spectral Shift between Near- and Far-Field Peak Intensities of Plasmonic Nanoantennas. https://doi.org/10.1103/physrevlett.110.203902

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