A conformal transformation approach to wide-angle illusion device and absorber

A conformal transformation approach to wide-angle illusion device and absorber

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We theoretically investigate the illusion device designed by a conformal transformation that can render an us polo assn mens sweaters elliptic defect behave like a flat mirror.Different from illusion devices consisting of the complementary medium and anti-object with negative permittivity and permeability, our proposed illusion device requires only isotropic positive permittivity medium.It offers a possible route to eliminate the lateral shift in the conventional quasi-conformal carpet cloak.

Interestingly, with the same conformal transformation, we can achieve an impedance-matched flat absorber by simply varying the shape and the refractive index of the defects.Both the illumination device and the absorber in wella color touch 77 45 our design have broad bandwidth, wide-illumination range and polarization-insensitive performance.