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

Abstract

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).

12 pages, 8 figures

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Cited by in corpus (6)

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• A diameter--bandwidth product limitation of isolated-object cloaking
• General scaling limitations of ground-plane and isolated-object cloaks
• A general cloak to shift the scattering of different objects
• Stochastic cloaking: concealing a region from diffusive particles
• Enhancement of near-cloaking for the full Maxwell equations