2009/05/11 by Cheng‐Wei Qiu, Cheng-Wei Qiu, Li Hu +6
Engineering · Materials Science · Mathematics · Physics and Astronomy · #Advanced Antenna and Metasurface Technologies #Cloak #Cloaking #Concentric #Discretization #Electromagnetic Scattering and Analysis #Geometry #Isotropy #Materials science #Mathematical analysis #Mathematics #Metamaterial #Metamaterials and Metasurfaces Applications #Nonlinear system #Optics #Physics #Transformation optics #physics.optics
paper · pdf · doi:10.1364/oe.17.013467
published as Opt. Express 17, 13467 (2009) · 12 pages, 8 figures
arxiv created 2009/05/11 · openalex publication_date 2009/07/21 · arxiv updated 2015/05/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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).