| Issue |
EPL
Volume 101, Number 5, March 2013
|
|
|---|---|---|
| Article Number | 57009 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/101/57009 | |
| Published online | 21 March 2013 | |
Metal nanoparticles with sharp corners: Universal properties of plasmon resonances
1 Institute of Automation and Electrometry, Russian Academy of Sciences - 630090 Novosibirsk, Russia
2 Institute of Crystallography, Russian Academy of Sciences - Leninskii pr. 59, 117333 Moscow, Russia
(a) sturman@iae.nsk.su
(b) podivilov@iae.nsk.su
(c) gorkunov@ns.crys.ras.ru
Received: 24 January 2013
Accepted: 24 February 2013
We predict the simultaneous occurrence of two fundamental phenomena for metal nanoparticles possessing sharp corners with variable curvature: First, the main dipolar plasmonic mode experiences a strong red shift with increasing corner curvature; for large values of the curvature, the resonant frequency is controlled by the apex angle of the corner. Second, the split-off plasmonic mode experiences a strong localization at the corners. Altogether, this paves the way for the tailoring of metal nanostructures providing a wavelength-selective excitation of localized plasmons and a strong near-field enhancement of linear and nonlinear optical phenomena.
PACS: 78.67.Uh – Nanowires / 73.20.Mf – Collective excitations (including excitons, polarons, plasmons and other charge-density excitations) / 42.25.Fx – Diffraction and scattering
© EPLA, 2013
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