The anti-cloak.
A kind of transformation media, which we shall call the "anti-cloak", is proposed to partially defeat the cloaking effect of the invisibility cloak. An object with an outer shell of "anti-cloak" is visible to the outside if it is coated with the invisible cloak. Fourier-Bessel analysis confirms this finding by showing that external electromagnetic wave can penetrate into the interior of the invisibility cloak with the help of the anti-cloak.
Chen
Huanyang
H
Department of Physics, Shanghai Jiao Tong University, Shanghai, China. kenyon@ust.hk
Luo
Xudong
X
Ma
Hongru
H
Chan
C T
CT
D003198:Computer Simulation; D008027:Light; D008420:Manufactured Materials; D008962:Models, Theoretical; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation; D012637:Security Measures