Looking into meta-atoms of plasmonic nanowire metamaterial
Journal
Nano Letters
Journal Volume
14
Journal Issue
9
Pages
4971-4976
Date Issued
2014
Author(s)
Tsai, K.-T.
Wurtz, G.A.
Chu, J.-Y.
Cheng, T.-Y.
Wang, H.-H.
Krasavin, A.V.
He, J.-H.
Wells, B.M.
Podolskiy, V.A.
Wang, Y.-L.
Zayats, A.V.
Abstract
Nanowire-based plasmonic metamaterials exhibit many intriguing properties related to the hyperbolic dispersion, negative refraction, epsilon-near-zero behavior, strong Purcell effect, and nonlinearities. We have experimentally and numerically studied the electromagnetic modes of individual nanowires (meta-atoms) forming the metamaterial. High-resolution, scattering-type near-field optical microscopy has been used to visualize the intensity and phase of the modes. Numerical and analytical modeling of the mode structure is in agreement with the experimental observations and indicates the presence of the nonlocal response associated with cylindrical surface plasmons of nanowires.
Publisher
American Chemical Society
Type
journal article