Low-loss ultra-high-Q dark mode plasmonic Fano metamaterials.

@article{Cao2012LowlossUD,
  title={Low-loss ultra-high-Q dark mode plasmonic Fano metamaterials.},
  author={Wei Cao and Ranjan Singh and Ibraheem A. I. Al-Naib and Mingxia He and Antoinette J. Taylor and Weili Zhang},
  journal={Optics letters},
  year={2012},
  volume={37 16},
  pages={3366-8}
}
We experimentally demonstrate a planar terahertz Fano metamaterial with an ultrahigh quality (Q) factor of 227. This is achieved by the excitation of the nonradiative dark modes by introducing a tiny asymmetry in the metamaterial structure. The extremely sharp quadrupole and Fano resonances are excited at normal incidence for orthogonal polarizations of the electric field. In order to capture the narrow linewidth of the dark resonance modes, we perform high resolution terahertz time-domain… CONTINUE READING
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