Inverse design of large-area metasurfaces.

@article{Pestourie2018InverseDO,
  title={Inverse design of large-area metasurfaces.},
  author={Rapha{\"e}l Pestourie and Carlos P{\'e}rez-Arancibia and Zin Lin and Wonseok Shin and Federico Capasso and Steven G. Johnson},
  journal={Optics express},
  year={2018},
  volume={26 26},
  pages={
          33732-33747
        }
}
We present a computational framework for efficient optimization-based "inverse design" of large-area "metasurfaces" (subwavelength-patterned surfaces) for applications such as multi-wavelength/multi-angle optimizations, and demultiplexers. To optimize surfaces that can be thousands of wavelengths in diameter, with thousands (or millions) of parameters, the key is a fast approximate solver for the scattered field. We employ a "locally periodic" approximation in which the scattering problem is… 

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