Optical scattering resonances of single plasmonic nanoantennas
Materials Science
2009-11-11 v3 Optics
Abstract
We investigate the far-field optical resonances of individual dimer nanoantennas using confocal scattering spectroscopy. Experiments on a single-antenna array with varying arm lengths and interparticle gap sizes show large spectral shifts of the plasmon modes due to a combination of geometrical resonances and plasmon hybridization. All resonances are considerably broadened compared to those of small nanorods in the quasistatic limit, which we attribute to a greatly enhanced radiative damping of the antenna modes. The scattering spectra are compared with rigorous model calculations that demonstrate both the near-field and far-field characteristics of a half-wave antenna.
Keywords
Cite
@article{arxiv.cond-mat/0612689,
title = {Optical scattering resonances of single plasmonic nanoantennas},
author = {O. L. Muskens and J. Gomez Rivas and V. Giannini and J. A. Sanchez-Gil},
journal= {arXiv preprint arXiv:cond-mat/0612689},
year = {2009}
}
Comments
4 pages, 4 figures