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A metal/dielectric multilayered metasurface can be used to engineer the plasma frequency by controlling the ratio between the metal and dielectric layers. In this work, we demonstrate that a multilayered nanodisk metasurface based on semiconductor materials offers the design flexibility for tuning the plasmonic resonance.
When heavily doped, semiconductors such as ZnO can exhibit metallic properties thus becoming versatile building blocks for optical metamaterials. Here, we design and fabricate an all-semiconductor metamaterial and demonstrate negative refraction in the near-infrared region.
The performance of metamaterial and transformation-optics devices is limited by losses in their plasmonic components. We show that ceramics (heavily doped-zinc oxide and titanium nitride) could help in overcoming the loss issue in the optical range.
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