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Measurement of the Ultrafast Temporal Response of a Plasmonic Antenna

Authors
  • Becker, Maria
  • Huang, Wayne Cheng-Wei
  • Batelaan, Herman
  • Smythe, Elizabeth
  • Capasso, Federico
Type
Preprint
Publication Date
Jul 30, 2012
Submission Date
Jul 30, 2012
Identifiers
DOI: 10.1002/andp.201200206
Source
arXiv
License
Yellow
External links

Abstract

We report a measurement on the temporal response of a plasmonic antenna at the femtosecond time scale. The antenna consists of a square array of nanometer-size gold rods. We find that the far-field dispersion of light reflected from the plasmonic antenna is less than that of a 1.2 mm thick glass slide. Assuming a simple oscillating dipole model this implies that the near-field of the antenna may be used as an electron switch that responds faster than 20 fs. Alternatively, ultrafast electron diffraction may be used to investigate the near-field dynamics of the plasmonic antenna.

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