Looking into meta-atoms of plasmonic nanowire metamaterial.
Nano Lett
; 14(9): 4971-6, 2014 Sep 10.
Article
em En
| MEDLINE
| ID: mdl-25115592
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.
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MEDLINE
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En
Ano de publicação:
2014
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Article