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

P. Alonso-González, P. Albella, F. Neubrech, C. Huck, J. Chen (陈佳宁), F. Golmar, F. Casanova, L. E. Hueso, A. Pucci, J. Aizpurua, and R. Hillenbrand
Phys. Rev. Lett. 110, 203902 – Published 14 May 2013

Abstract

Theory 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.

  • Received 16 August 2012

DOI:https://doi.org/10.1103/PhysRevLett.110.203902

© 2013 American Physical Society

Authors & Affiliations

P. Alonso-González1, P. Albella1,2, F. Neubrech3, C. Huck3, J. Chen (陈佳宁)1,2, F. Golmar1,4, F. Casanova1,5, L. E. Hueso1,5, A. Pucci3, J. Aizpurua2, and R. Hillenbrand1,5,*

  • 1CIC nanoGUNE, 20018 Donostia–San Sebastián, Spain
  • 2Centro de Física de Materiales (CSIC-UPV/EHU) and Donostia International Physics Center (DIPC), 20018 Donostia–San Sebastián, Spain
  • 3Kirchhoff Institute for Physics, University of Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany
  • 4I.N.T.I.-CONICET, Avenida General Paz 5445, Edificio 42, B1650JKA, San Martín, Bs As, Argentina
  • 5IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain

  • *r.hillenbrand@nanogune.eu

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Issue

Vol. 110, Iss. 20 — 17 May 2013

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