Magnetic metamaterials at telecommunication and visible frequencies

Details Magnetic metamaterials at telecommunication and visible frequencies Magnetic metamaterials at telecommunication and visible frequencies

2005-04-29

arxiv.org/abs/cond-mat/0504774v2

Phys. Rev. Lett., Vol. 95, 203901 (2005)

Physics

Condensed Matter

Materials Science

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.95.203901

Arrays of gold split-rings with 50-nm minimum feature size and with an LC resonance at 200-THz frequency (1500-nm wavelength) are fabricated. For normal incidence conditions, they exhibit a pronounced fundamental magnetic mode, arising from a coupling via the electric component of the incident light. For oblique incidence, a coupling via the magnetic component is demonstrated as well. Moreover, we identify a novel higher-order magnetic resonance at around 370 THz (800-nm wavelength) that evolves out of the Mie resonance for oblique incidence. Comparison with theory delivers good agreement and also shows that the structures allow for a negative magnetic permeability.

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