4.6 Article

Route to low-scattering cylindrical cloaks with finite permittivity and permeability

Journal

PHYSICAL REVIEW B
Volume 79, Issue 15, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.155122

Keywords

metamaterials; multilayers; permeability; permittivity

Funding

  1. National Natural Science Foundation of China [60801005, 60531020]
  2. Zhejiang Provincial Natural Science Foundation [R1080320]
  3. Ph.D Programs Foundation of MEC [200803351025]
  4. Office of Naval Research [0014-06-1-0001]
  5. Department of the Air Force [FA8721-05C-0002]

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The method of coordinate transformation offers a way to realize perfect cloaks but provides less ability to characterize the performance of a multilayered cloak in practice. Here, we propose an analytical model to predict the performance of a multilayered cylindrical cloak, based on which, the cloak in practice can be optimized to diminish the intrinsic scatterings caused by discretization and simplification. Extremely low scattering or quasiperfect invisibility can be achieved with only a few layers of anisotropic metamaterials without following the transformation method. Meanwhile, the permittivity and permeability parameters of the layers are relatively small, which is a remarkable advantage of our approach.

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