We present a simple method that is able to predict the resonant frequencies of a metallic conical nanoantenna. The alculation is based on an integral relation that takes into account the dependence of the effective refractive index of the plasmonic mode on the cone radius. Numerical simulations retrieving the near field properties of nanocones with different lengths are also performed for comparison. The fine agreement between the two approaches demonstrates the validity of our method. © 2014 Optical Society of America.
KAUST Repository Item: Exported on 2021-02-05
Acknowledgements: The authors gratefully acknowledge support from the European project FOCUS FP7 no. 270483. L. R. also acknowledges financial support from NSERC Discovery Grant and FQRNT Nouveaux Chercheurs Grant.
- Atomic and Molecular Physics, and Optics