KIP publications

 
year 2011
author(s) Daniel Weber, Pablo Albella, Pablo Alonso-González, Frank Neubrech, Gui Han, Tadaaki Nagao, Rainer Hillenbrand, Javier Aizpurua, Annemarie Pucci
title Longitudinal and transverse coupling in infrared gold nanoantenna arrays: long range versus short range interaction regimes
KIP-Nummer HD-KIP 11-50
KIP-Gruppe(n) F6
document type Paper
Keywords nanoantenna, infrared spectroscopy, plasmonics, interaction
source Optics Express 19 (2011) 15047
doi 10.1364/OE.19.015047
Abstract (en)

Interaction between micrometer-long nanoantennas within an array considerably modifies the plasmonic resonant behaviour; for fundamental resonances in the infrared already at micrometer distances. In order to get systematic knowledge on the relationship between infrared plasmonic resonances and separation distances dx and dy in longitudinal and transverse direction, respectively, we experimentally studied the optical extinction spectra for rectangularly ordered lithographic gold nanorod arrays on silicon wafers. For small dy, strong broadening of resonances and strongly decreased values of far-field extinction are detected which come along with a decreased near-field intensity, as indicated by near-field amplitude maps of the interacting nanoantennas. In contrast, near-field interaction over small dx does only marginally broaden the resonance. Our findings set a path for optimum design of rectangular nanorod lattices for surface enhanced infrared spectroscopy.

bibtex
@article{Weber11,
  author   = {Daniel Weber and Pablo Albella and Pablo Alonso-Gonz\'{a}lez and Frank Neubrech and Han Gui and Tadaaki Nagao and Rainer Hillenbrand and Javier Aizpurua and Annemarie Pucci},
  title    = {Longitudinal and transverse coupling in infrared gold nanoantenna arrays: long range versus short range interaction regimes},
  journal  = {Optics Express},
  year     = {2011},
  volume   = {19},
  number   = {16},
  pages    = {15047-15061},
  month    = {Aug},
  doi      = {10.1364/OE.19.015047},
  url      = {http://www.opticsexpress.org/abstract.cfm?URI=oe-19-16-15047}
}
URL Link to the publication in Optics Express
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