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An electromagnetic illusion method with planar metasurfaces is demonstrated numerically and experimentally. In the method, the scattering field of an arbitrary object can be built by using a planar ultrathin metasurface with dual-polarized subwavelength unit cells. The proposed planar illusion metasurface can disguise itself as an arbitrary object when the incident wave comes from a relative wide...
Many interesting wave manipulation devices, including illusion devices, have been proposed and realized by transformation optics. Using illusion devices, an object of arbitrary shape can be made to appear like another object. However, there are substantial limitations in current illusion devices based on transformation optics. Firstly, refractive index must be modulated over a large volume, thus,...
Time reversal (TR) of electromagnetic waves exhibits temporal and spatial focusing. With the assistance of near-field sub-wavelength structures, TR electromagnetic waves can show spatial super-resolution focusing both in the near- and far-fields. Based on this characteristic, TR technique has found potential applications in super-resolution imaging. This invited talk simply gives an overview on far-field...
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