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Surface plasmons (SPs) are electromagnetic waves propagating along metallic-dielectric interfaces which can be supported by structures at broad scales and can find extensive applications from sensing to optical waveguiding. SPs can take different forms, from free waves to localized oscillations depending on different geometries. The excitation of the spectrum of a plasmonic nanostructure is determined...
Metamaterials are artificial electromagnetic structures that can have a negative refractive-index, not available in nature. Until now, many different structures have been investigated and considerable approaches have been realized. However, fabrication of metamaterials is still a critical issue due to the difficulty of etching metals especially when the structure dimension is reduced. In this letter,...
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