학술논문
Electric and magnetic dipole coupling in near-infrared split ring metamaterial arrays
Document Type
Working Paper
Author
Source
Phys. Rev. Lett. 103, 213902 (2009)
Subject
Language
Abstract
We present experimental observations of strong electric and magnetic interactions between split ring resonators (SRRs) in metamaterials. We fabricated near-infrared (1.4 $\mu$m) planar metamaterials with different inter-SRR spacings along different directions. Our transmission measurements show blueshifts and redshifts of the magnetic resonance, depending on SRR orientation relative to the lattice. The shifts agree well with a simple model with simultaneous magnetic and electric near-field dipole coupling. We also find large broadening of the resonance, accompanied by a decrease in effective cross section per SRR with increasing density. These effects result from superradiant scattering. Our data shed new light on Lorentz-Lorenz approaches to metamaterials.
Comment: 4 pages, 4 color figures
Comment: 4 pages, 4 color figures