Spherical cloaking using nonlinear transformations for improved segmentation into concentric isotropic coatings

Details Spherical cloaking using nonlinear transformations for improved segmentation into concentric isotropic coatings Spherical cloaking using nonlinear transformations for improved segmentation into concentric isotropic coatings

2009-05-11

arxiv.org/abs/0905.1729v1

Opt. Express 17, 13467 (2009)

Physics

Optics

12 pages, 8 figures

Scientific paper

Two novel classes of spherical invisibility cloaks based on nonlinear transformation have been studied. The cloaking characteristics are presented by segmenting the nonlinear transformation based spherical cloak into concentric isotropic homogeneous coatings. Detailed investigations of the optimal discretization (e.g., thickness control of each layer, nonlinear factor, etc.) are presented for both linear and nonlinear spherical cloaks and their effects on invisibility performance are also discussed. The cloaking properties and our choice of optimal segmentation are verified by the numerical simulation of not only near-field electric-field distribution but also the far-field radar cross section (RCS).

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