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A 3D toroidal metamaterial is demonstrated in article number 1606298 by Junjie Li, Changzhi Gu, and co‐workers, to address the excitation of high‐quality‐factor toroidal moment in mid‐infrared region. The metamaterial composed of metal patterns of well controlled split direction and spatial orientation was fabricated by an ion beam‐induced folding technique on suspended SiNx film. The radiation power...
With unusual electromagnetic radiation properties and great application potentials, optical toroidal moments have received increasing interest in recent years. 3D metamaterials composed of split ring resonators with specific orientations in micro‐/nanoscale are a perfect choice for toroidal moment realization in optical frequency considering the excellent magnetic confinement and quality factor, which,...
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