Electromagnetic interaction of split-ring resonators: The role of separation and relative orientation.
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.
Feth
Nils
N
Institut für Nanotechnologie, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany. nils.feth@kit.edu
König
Michael
M
Husnik
Martin
M
Stannigel
Kai
K
Niegemann
Jens
J
Busch
Kurt
K
Wegener
Martin
M
Linden
Stefan
S
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*