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9 October 2012 Generic multishell cloak
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A study of a generic multishell cloaking system that conceals an object from incident electromagnetic radiation regardless of the object shape and/or material (optical) properties is presented. Transparency conditions based on zero permittivity materials for both cylindrically and spherically symmetric systems are derived. It has been shown that zero permittivity material shells can be realized using noble metals. In addition, we proposed a zero-index lowloss tunable shell design based on metal-dielectric composite material to realize the cloak. Our results show that the proposed design can achieve cloaking across the entire optical spectral range and can decrease the scattering-cross section by a factor of up to 103. Furthermore, a full wave analysis is performed showing the independence of cloak performance on the object shape and material properties. The proposed approach toward clocking does not require optical magnetism and underline the importance of zero index materials for achieving electromagnetic invisibility.
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Pattabhiraju C. Mundru, Venkatesh K. Pappakrishnan, and Dentcho A. Genov "Generic multishell cloak", Proc. SPIE 8457, Plasmonics: Metallic Nanostructures and Their Optical Properties X, 84573X (9 October 2012);

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