Metal nanoparticles with sharp corners: Universal properties of plasmon resonances
Optics
2015-06-05 v1 Mesoscale and Nanoscale Physics
Materials Science
Abstract
We predict the simultaneous occurrence of two fundamental phenomena for metal nanoparticles possessing sharp corners: First, the main plasmonic dipolar mode experiences strong red shift with decreasing corner curvature radius; its resonant frequency is controlled by the apex angle of the corner and the normalized (to the particle size) corner curvature. Second, the split-off plasmonic mode experiences strong localization at the corners. Altogether, this paves the way for tailoring of metal nano-structures providing wavelength-selective excitation of localized plasmons and a strong near-field enhancement of linear and nonlinear optical phenomena.
Keywords
Cite
@article{arxiv.1207.5606,
title = {Metal nanoparticles with sharp corners: Universal properties of plasmon resonances},
author = {B. Sturman and E. Podivilov and M. Gorkunov},
journal= {arXiv preprint arXiv:1207.5606},
year = {2015}
}