Engineered Diffraction Gratings for Acoustic Cloaking

@article{Jin2019EngineeredDG,
  title={Engineered Diffraction Gratings for Acoustic Cloaking},
  author={Yabin Jin and Xinsheng Fang and Yong Li and Daniel Torrent},
  journal={Physical Review Applied},
  year={2019}
}
We show that engineered diffraction gratings can considerably simplify the design and performance of acoustic devices. Acoustic reflecting gratings based on rectangular cavities drilled on an acoustically rigid surface are designed in such a way that all the incident energy is channeled towards the diffracted mode traveling in the oposite direction of the incident field (retroreflection effect), and this effect is used to cloak an object placed over a rigid surface. Axisymmetric gratings… 

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