Plasmonic nanoparticle monomers and dimers: From nano-antennas to chiral metamaterials

Abstract

We review the basic physics behind light interaction with plasmonic nanoparticles. The theoretical foundations of light scattering on one metallic particle (a plasmonic monomer) and two interacting particles (a plasmonic dimer) are systematically investigated. Expressions for effective particle susceptibility (polarizability) are derived, and applications of these results to plasmonic nanoantennas are outlined. In the long-wavelength limit, the effective macroscopic parameters of an array of plasmonic dimers are calculated. These parameters are attributable to an effective medium corresponding to a dilute arrangement of nanoparticles, i.e., a metamaterial where plasmonic monomers or dimers have the function of "meta-atoms". It is shown that planar dimers consisting of rod-like particles generally possess elliptical dichroism and function as atoms for planar chiral metamaterials. The fabricational simplicity of the proposed rod-dimer geometry can be used in the design of more cost-effective chiral metamaterials in the optical domain.

submitted to Appl. Phys. B

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Cited by in corpus (4)

• Circular dichroism induced by Fano resonances in planar chiral oligomers
• Asymmetric transmission in planar chiral split-ring metamaterials: Microscopic Lorentz-theory approach
• Interference Induced Asymmetric Transmission Through A Monolayer of Anisotropic Chiral Metamolecules
• Localized surface plasmon modes in a system of two interacting metallic cylinders