title: Electromagnetic interaction of split-ring resonators: The role of separation and relative orientation.
abstract: Extinction cross-section spectra of split-ring-resonator dimers have been measured at near-infrared frequencies with a sensitive spatial modulation technique. The resonance frequency of the dimer's coupled mode as well as its extinction cross-section and its quality factor depend on the relative orientation and separation of the two split-ring resonators. The findings can be interpreted in terms of electric and magnetic dipole-dipole interaction. Numerical calculations based on a Discontinuous Galerkin Time-Domain approach are in good agreement with the experiments and support our physical interpretation.
authors.affiliation: Institut für Nanotechnologie, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany. nils.feth@kit.edu
authors.forename: Nils
authors.initials: N
authors.lastname: Feth
authors.forename: Michael
authors.initials: M
authors.lastname: König
authors.forename: Martin
authors.initials: M
authors.lastname: Husnik
authors.forename: Kai
authors.initials: K
authors.lastname: Stannigel
authors.forename: Jens
authors.initials: J
authors.lastname: Niegemann
authors.forename: Kurt
authors.initials: K
authors.lastname: Busch
authors.forename: Martin
authors.initials: M
authors.lastname: Wegener
authors.forename: Stefan
authors.initials: S
authors.lastname: Linden
mesh_terms: D000465:Algorithms; D019281:Dimerization; D055590:Electromagnetic Phenomena; D004867:Equipment Design; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning / Q000379:methods; D055095:Optics and Photonics; D017785:Photons; D011827:Radiation; D013053:Spectrophotometry / Q000379:methods*