title: Homogenous isotropic invisible cloak based on geometrical optics.
abstract: 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.
authors.affiliation: Department of Material Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing, China.
authors.forename: Jingbo
authors.initials: J
authors.lastname: Sun
authors.forename: Ji
authors.initials: J
authors.lastname: Zhou
authors.forename: Lei
authors.initials: L
authors.lastname: Kang