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arXiv · 1207.5606

Metal nanoparticles with sharp corners: Universal properties of plasmon resonances

B. Sturman·E. Podivilov·M. Gorkunov
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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.

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B. Sturman, E. Podivilov, M. Gorkunov. 2012-07-24. Metal nanoparticles with sharp corners: Universal properties of plasmon resonances. https://doi.org/10.1209/0295-5075%2F101%2F57009

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