title: Magnetic plasmon formation and propagation in artificial aromatic molecules.
abstract: The plasmonic properties of coupled metallic nanostructures are understood through the analogy between their collective plasmon modes and the electronic orbitals of corresponding molecules. Here we expand this analogy to planar arrangements of plasmonic nanostructures whose magnetic plasmons directly resemble the delocalized orbitals of aromatic hydrocarbon molecules. The heptamer structure serves as a benzene-like building block for a family of plasmonic artificial aromatic analogs with fused ring structures. Antiphase magnetic plasmons are excited in adjacent fused heptamer units, which for a linear multiheptamer structure is a behavior controlled by the number of units in the structure. This antiphase coupling gives rise to plasmonic "antiferromagnetic" behavior in multiple repeated heptamer structures, supporting the propagation of low-loss magnetic plasmons in this new waveguide geometry.
authors: Department of Electrical and Computer Engineering, 6100 Main Street, Houston, Texas 77005, USA. nl7@rice.edu
authors: Na
authors: N
authors: Liu
authors: Shaunak
authors: S
authors: Mukherjee
authors: Kui
authors: K
authors: Bao
authors: Lisa V
authors: LV
authors: Brown
authors: Jens
authors: J
authors: Dorfmüller
authors: Peter
authors: P
authors: Nordlander
authors: Naomi J
authors: NJ
authors: Halas
mesh_terms: D006841:Hydrocarbons, Aromatic / Q000737:chemistry*; D008280:Magnetics; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D020349:Surface Plasmon Resonance / Q000379:methods*
chemical_list: D006841:Hydrocarbons, Aromatic