Engineering the dispersion of metamaterial surface for broadband infrared absorption.

@article{Feng2012EngineeringTD,
  title={Engineering the dispersion of metamaterial surface for broadband infrared absorption.},
  author={Qin Feng and Mingbo Pu and Chenggang Hu and Xiangang Luo},
  journal={Optics letters},
  year={2012},
  volume={37 11},
  pages={2133-5}
}
We propose a broadband infrared absorber by engineering the frequency dispersion of metamaterial surface (metasurface) to mimic an ideal absorbing sheet. With a thin layer of structured nichrome, a polarization-independent absorber with absorption larger than 97% is numerically demonstrated over a larger than one octave bandwidth. It is shown that the bandwidth enhancement is related with the transformation of the Drude model of free electron gas in metal film to the Lorentz oscillator model of… CONTINUE READING
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