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We investigate the polarizing properties of chiral photonic metamaterials composed of three-dimensional metal helices. The calculated spectra reveal pronounced circular dichroism. Our geometry parameters are compatible with fabrication via direct laser writing and electrodeposition.
We present a planar magnetic metamaterial fabricated using 3D direct laser writing and silver chemical vapor deposition as well as a negative-index bi-anisotropic metamaterial metallized via silver shadow evaporation. Calculations and experiments show good agreement.
We measure the absolute extinction cross-section spectrum of isolated pairs of split-ring resonators by a modulation technique. The spectral position of the magnetic resonance depends on the separation of the split-ring resonators.
After briefly reviewing the tremendous progress in the emerging field of (e.g., magnetic or negative-index) photonic metamaterials, we focus on the remaining two major challenges: Fabrication of truly three-dimensional structures and reduction of losses.
We review recent progress in the field of metamaterials for photonics. Examples are artificial magnetism at optical frequencies, negative phase and group velocities, and enhanced nonlinear phenomena.
We present a novel approach for fabricating large-area (16 times 22 mm2) magnetic metamaterials with a negative magnetic permeability at telecom wavelengths. Our approach brings the complexity of fabricating magnetic layers down to that of dielectric layers.
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