Measurement of the Ultrafast Temporal Response of a Plasmonic Antenna

Authors

Maria Becker, University of Nebraska - LincolnFollow
Wayne Cheng-Wei Huang, University of Nebraska-LincolnFollow
Herman Batelaan, University of Nebraska - LincolnFollow
Elizabeth J. Smythe, Schlumberger-Doll Research, Cambridge, Mass.
Federico Capasso, Harvard UniversityFollow

ORCID IDs

Wayne Cheng-Wei Huang

Herman Batelaan

Frederico Capasso

Date of this Version

2012

Citation

Annalen der Physik (2012) 5: 201200206.

Comments

Post print. Copyright 2012, Springer. Used by permission.

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 f s. Alternatively, ultrafast electron diffraction may be used to investigate the near-field dynamics of the plasmonic antenna.