Abstract
We experimentally demonstrate both the electric and magnetic responses from the multiple-split-ring resonators (MSRRs) via normal reflectance measurements. All the fabricated MSRRs exhibit electric resonances under electric couplings but the magnetic resonances are only excited in MSRRs with odd numbers of splits from the asymmetrically electric couplings. Furthermore, the dependence of split numbers on the resonant positions and strengths is also investigated. In addition, the coupling mechanism of correlated resonances in the MSRRs can be well elucidated by the concept of standing-wave plasmonic resonances. Such scalable MSRRs present the tailored electromagnetic responses at desired frequencies, paving ways toward integrated nanophotonic applications. © 2009 American Institute of Physics.