Freestanding dielectric nanohole array metasurface for mid-infrared wavelength applications.

  title={Freestanding dielectric nanohole array metasurface for mid-infrared wavelength applications.},
  author={Jun Rong Ong and Hong-Son Chu and Valerian Hongjie Chen and Alexander Y. Zhu and Patrice Genevet},
  journal={Optics letters},
  volume={42 13},
We designed and simulated freestanding dielectric optical metasurfaces based on arrays of etched nanoholes in a silicon membrane. We showed 2π phase control and high forward transmission at mid-infrared (mid-IR) wavelengths around 4.2 μm by tuning the dimensions of the holes. We also identified the mechanisms responsible for high forward scattering efficiency and showed that these conditions are connected with the well-known Kerker conditions already proposed for isolated scatterers. A beam… 

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