Open AccessSpectral properties of plasmonic resonator antennas
Author(s) -
Edward S. Barnard,
Justin S. White,
Anu Chandran,
Mark L. Brongersma
Publication year - 2008
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.016529
Subject(s) - optics , resonator , plasmon , physics , reflection (computer programming) , metamaterial , finite difference time domain method , fresnel equations , antenna (radio) , interference (communication) , surface plasmon , fabry–pérot interferometer , surface plasmon polariton , strips , materials science , refractive index , telecommunications , laser , computer science , channel (broadcasting) , composite material , programming language
A theoretical study of the optical properties of metallic nano-strip antennas is presented. Such strips exhibit retardation-based resonances resulting from the constructive interference of counter propagating short-range surface plasmon-polaritons (SR-SPPs) that reflect from the antenna terminations. A Fabry-P erot model was formulated that successfully predicts both the peak position and spectral shape of their optical resonances. This model requires knowledge of the SR-SPP reflection amplitude and phase pickup upon reflection from the structure terminations. These quantities were first estimated using an intuitive Fresnel reflection model and then calculated exactly using full-field simulations based on the finite-difference frequency-domain (FDFD) method. With only three dimensionless scaling parameters, the Fabry-P erot model provides simple design rules for engineering resonant properties of such plasmonic resonator antennas.