Open AccessBianisotropy and spatial dispersion in highly anisotropic near-infrared resonator arrays
Author(s) -
P. W. Kolb,
T. D. Corrigan,
H. D. Drew,
A. B. Sushkov,
R. J. Phaneuf,
Alexander B. Khanikaev,
S. Hossein Mousavi,
Gennady Shvets
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.024025
Subject(s) - optics , metamaterial , polarization (electrochemistry) , anisotropy , spatial frequency , physics , dispersion (optics) , electric field , magnetic field , resonator , split ring resonator , electromagnetic radiation , dipole , chemistry , quantum mechanics
We measure, simulate, and analyze the optical transmission through arrays of Ag nanorod pairs and U-shaped nanostructures as a function of polarization and angle of incidence. The bianisotropic nature of the metamaterials is exhibited in data and in simulations, and we argue that the electric field rather than the magnetic field excites the low frequency "magnetic" mode. We also observe spatial dispersion in the form of frequency shifts as a function of incident angle which we attribute to coupling effects between neighboring structures. A simple model based upon coupled electromagnetic dipoles is found to provide a qualitative description for the main features observed in the spectra.