Article

Coaxial plasmonic waveguide array as a negative-index metamaterial.

Valencia Nanophotonics Technology Center, Universidad Politécnica de Valencia, 46022 Valencia, Spain.
Optics Letters (impact factor: 3.4). 11/2009; 34(21):3325-7.
Source: PubMed

ABSTRACT We propose the use of closely packed deep-subwavelength plasmonic coaxial waveguides that support backward propagating modes at visible frequencies, analogous to those in planar metal-insulator-metal geometries, as negative-index metamaterials. We show through simulation that the propagation properties of the metamaterial are determined by the dispersion relation of the constitutive waveguides. The metamaterial is polarization independent, is uniform in the propagation direction, and has a subwavelength character in the transversal directions. The transmission loss through the structure is also analyzed.

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Keywords

analogous
 
deep-subwavelength plasmonic coaxial waveguides
 
dispersion relation
 
metamaterial
 
negative-index metamaterials
 
propagation properties
 
subwavelength character
 
support backward propagating modes
 
transmission loss
 
transversal directions