Abstract
Recent advances in metamaterial research have provided us a blueprint for realistic cloaking capabilities, and it is crucial to develop practical designs to convert concepts into real-life devices. We present two structures for optical cloaking based on high-order transformations for TM and TE polarizations respectively. These designs are possible for visible and infrared wavelengths. This critical development builds upon our previous work on nonmagnetic cloak designs and high-order transformations.
Highlights
Cloaking is a longtime dream that may date back to the very beginning of human civilization
We demonstrate i) a non-magnetic cylindrical cloaking system for TM incidence which consists of a layered metal-dielectric without any variation in either material or structure along the vertical direction; ii) a magnetic cylindrical cloak for TE incidence utilizing Mie resonance in periodic rod-shaped high-permittivity materials
We observe very good agreement between the required values and the calculated ones based on analytical formulae, and the imaginary part in the effective permeability is less than 0.06. This computation verifies the feasibility of the proposed cloaking system based on SiC wire arrays for the TE polarization
Summary
Cloaking (or being invisible) is a longtime dream that may date back to the very beginning of human civilization. In the last few years, this dream moves one step closer to reality, thanks to various schemes proposed to control and manipulate electromagnetic waves in unprecedented ways [1,2,3,4,5,6]. From among these methods, the transformation approach, which generalized a similar idea on cloaking of thermal conductivity [7, 8], has generated enormous interest [912], partially because of its similarity to the mythological version of cloak: a closed surface is created which renders arbitrary objects within its interior invisible to detection. Through careful design of the geometry, the anisotropy and gradient of material properties in the cloaking shell fits remarkably well to the intended transformation
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