Homogenous isotropic invisible cloak based on geometrical optics.
Invisible cloak derived from the coordinate transformation requires its constitutive material to be anisotropic. In this work, we present a cloak of graded-index isotropic material based on the geometrical optics theory. The cloak is realized by concentric multilayered structure with designed refractive index to achieve the low-scattering and smooth power-flow. Full-wave simulations on such a design of a cylindrical cloak are performed to demonstrate the cloaking ability to incident wave of any polarization. Using normal nature material with isotropy and low absorption, the cloak shows light on a practical path to stealth technology, especially that in the optical range.
Sun
Jingbo
J
Department of Material Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing, China.
Zhou
Ji
J
Kang
Lei
L