Issue
EPL
Volume 83, Number 2, July 2008
Article Number 27004
Number of page(s) 6
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI http://dx.doi.org/10.1209/0295-5075/83/27004
Published online 27 June 2008
EPL, 83 (2008) 27004
DOI: 10.1209/0295-5075/83/27004

Resonance capacity of surface plasmon on subwavelength metallic structures

Ying Gu, Liangliang Chen, Haixi Zhang and Qihuang Gong

State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University - Beijing 100871, China

ygu@pku.edu.cn
qhgong@pku.edu.cn

received 21 April 2008; accepted in final form 28 May 2008; published July 2008
published online 27 June 2008

Abstract
Green's matrix method as well as the newly defined resonance capacity of surface plasmon are presented and applied to select the strong resonances for arbitrary shaped subwavelength metallic structures. The resonance capacity distributions for a certain structure type make it possible to tailor the metallic resonant properties in the selected wavelength. Moreover, the resonance capacity is found to be almost immune to the incident wavelength for a definite structure zoomed in or out in the subwavelength scale $(l<\frac{\lambda }{15}) $. Our numerical calculations are also in agreement with the previous experimental results on nanoantennas.

PACS
73.20.Mf - Collective excitations (including excitons, polarons, plasmons and other charge-density excitations).
78.67.-n - Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures.
78.68.+m - Optical properties of surfaces.

© EPLA 2008