Large quality factor in sheet metamaterials made from dark dielectric meta-atoms
arXiv:1405.7915 · doi:10.1103/PhysRevLett.112.117403
Abstract
Metamaterials-or artificial electromagnetic materials-can create media with properties unattainable in nature, but mitigating dissipation is a key challenge for their further development. Here, we demonstrate a low-loss metamaterial by exploiting dark bound states in dielectric inclusions coupled to the external waves by small nonresonant metallic antennas. We experimentally demonstrate a dispersion-engineered metamaterial based on a meta-atom made from alumina, and we show that its resonance has a much larger quality factor than metal-based meta-atoms. Finally, we show that our dielectric meta-atom can be used to create sheet metamaterials with negative permittivity or permeability.
5 pages, 6 figures
References in corpus (4)
- A comparison of graphene, superconductors and metals as conductors for metamaterials and plasmonics
- All-Dielectric Rod-Type Metamaterials at Optical Frequencies
- Surface Plasmon Driven Electric and Magnetic Resonators for Metamaterials
- Miniaturization of photonic waveguides by the use of left-handed materials