Isotropic-medium three-dimensional cloaks for acoustic and electromagnetic waves
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2012-03-01
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Abstract
We propose a generalization of the two-dimensional eikonal-limit cloak derived from a conformal transformation to three dimensions. The proposed cloak is a spherical shell composed of only isotropic media; it operates in the transmission mode and requires no mirror or ground plane. Unlike the well-known omnidirectional spherical cloaks, it may reduce visibility of an arbitrary object only for a very limited range of observation angles. In the short-wavelength limit, this cloaking structure restores not only the trajectories of incident rays, but also their phase, which is a necessary ingredient to complete invisibility. Both scalar-wave (acoustic) and transverse vector-wave (electromagnetic) versions are presented. © 2012 American Institute of Physics.
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Urzhumov, Y, N Landy and DR Smith (2012). Isotropic-medium three-dimensional cloaks for acoustic and electromagnetic waves. Journal of Applied Physics, 111(5). p. 053105. 10.1063/1.3691242 Retrieved from https://hdl.handle.net/10161/5721.
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