Plasmon scattering from single sub-wavelength holes
Mesoscale and Nanoscale Physics
2012-12-18 v1 Optics
Abstract
We map the complex electric fields associated with the scattering of surface plasmon polaritons by single sub-wavelength holes of different sizes in thick gold films. We identify and quantify the different modes associated with this event, including a radial surface wave with an angularly isotropic amplitude. This wave is shown to arise from the out-of-plane electric dipole induced in the hole, and we quantify the corresponding polarizability, which is in excellent agreement with electromagnetic theory. Time-resolved measurements reveal a time-delay of 38? +/- 18 fs between the surface plasmon polariton and the radial wave, which we attribute to the interaction with a broad hole resonance.
Cite
@article{arxiv.1212.4035,
title = {Plasmon scattering from single sub-wavelength holes},
author = {N. Rotenberg and M. Spasenovic and T. L. Krijger and B. le Feber and F. J. Garcıa de Abajo and L. Kuipers},
journal= {arXiv preprint arXiv:1212.4035},
year = {2012}
}