Plasmonic rod dimers as elementary planar chiral meta-atoms

Abstract

Electromagnetic response of metallic rod dimers is theoretically calculated for arbitrary planar arrangement of rods in the dimer. It is shown that dimers without an in-plane symmetry axis exhibit elliptical dichroism and act as "atoms" in planar chiral metamaterials. Due to a very simple geometry of the rod dimer, such planar metamaterials are much easier in fabrication than conventional split-ring or gammadion-type structures, and lend themselves to a simple analytical treatment based on coupled dipole model. Dependencies of metamaterial's directional asymmetry on the dimer's geometry are established analytically and confirmed in numerical simulations.

3 pages

References in corpus (3)

• An advanced Jones calculus for the classification of periodic metamaterials
• Planar metamaterial with transmission and reflection that depend on the direction of incidence
• Elliptical dichroism: operating principle of planar chiral metamaterials

Cited by in corpus (5)

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• Asymmetric transmission in planar chiral split-ring metamaterials: Microscopic Lorentz-theory approach
• Substrate-Induced Chirality in an Individual Nanostructure
• Plasmonic nanoparticle monomers and dimers: From nano-antennas to chiral metamaterials
• Localized surface plasmon modes in a system of two interacting metallic cylinders