Optical toroidal dipolar response by an asymmetric double-bar metamaterial
arXiv:1212.5651 · doi:10.1063/1.4757613
Abstract
We demonstrate that the toroidal dipolar response can be realized in the optical regime by designing a feasible nanostructured metamaterial, comprising asymmetric double-bar magnetic resonators assembled into a toroid-like configuration. It is confirmed numerically that an optical toroidal dipolar moment dominates over other moments. This response is characterized by a strong confinement of an E-field component at the toroid center, oriented perpendicular to the H-vortex plane. The resonance-enhanced optical toroidal response can provide an experimental avenue for various interesting optical phenomena associated with the elusive toroidal moment.
17 pages, 6 figures
References in corpus (3)
Cited by in corpus (13)
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