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

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

Blog Article

We theoretically investigate the illusion device designed Wildbird Feeders by a conformal transformation that can render an 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, Wall Art 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 our design have broad bandwidth, wide-illumination range and polarization-insensitive performance.