Spherical cloaking using nonlinear transformations for improved segmentation into concentric isotropic coatings
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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).
Date issued
2009-07Department
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies; Massachusetts Institute of Technology. Department of Mathematics; Massachusetts Institute of Technology. Research Laboratory of ElectronicsJournal
Optics Express
Publisher
Optical Society of America
Citation
Qiu, Chengwei, Li Hu, Baile Zhang, Bae-Ian Wu, Steven G. Johnson, and John D. Joannopoulos. “Spherical cloaking using nonlinear transformations for improved segmentation into concentric isotropic coatings.” Optics Express 17, no. 16 (July 21, 2009): 13467. © 2009 Optical Society of America
Version: Final published version
ISSN
1094-4087