Construction of invisibility cloaks of arbitrary shape and size using planar layers of metamaterials
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Transformation optics (TO) is a powerful tool for the design of electromagnetic and optical devices with novel functionality derived from the unusual properties of the transformation media. In general, the fabrication of TO media is challenging, requiring spatially varying material properties with both anisotropic electric and magnetic responses. Though metamaterials have been proposed as a path for achieving such complex media, the required properties arising from the most general transformations remain elusive, and cannot implemented by state-of-the-art fabrication techniques. Here, we propose faceted approximations of TO media of arbitrary shape in which the volume of the TO device is divided into flat metamaterial layers. These layers can be readily implemented by standard fabrication and stacking techniques. We illustrate our approximation approach for the specific example of a two-dimensional, omnidirectional "invisibility cloak", and quantify its performance using the total scattering cross section as a practical figure of merit. © 2012 American Institute of Physics.
Published Version (Please cite this version)10.1063/1.4729012
Publication InfoElsen, C; Paul, O; Rahm, M; Smith, D; & Urzhumov, Yaroslav A (2012). Construction of invisibility cloaks of arbitrary shape and size using planar layers of metamaterials. Journal of Applied Physics, 111(12). pp. 123106. 10.1063/1.4729012. Retrieved from http://hdl.handle.net/10161/7570.
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Adjunct Assistant Professor in the Department of Electrical and Computer Engineering
<!--[if gte mso 9]> <![endif]--> <!--[if gte mso 9]> <![endif]-->Dr. Urzhumov is Adjunct Assistant Professor of ECE at Duke University, and also a Technologist at the Metamaterials Commercialization Center of Intellectual Ventures. Previously a research faculty at Duke, he works on applied and theoretical aspects of metama