title: Invisible metallic mesh.
abstract: A solid material possessing identical electromagnetic properties as air has yet to be found in nature. Such a medium of arbitrary shape would neither reflect nor refract light at any angle of incidence in free space. Here, we introduce nonscattering corrugated metallic wires to construct such a medium. This was accomplished by aligning the dark-state frequencies in multiple scattering channels of a single wire. Analytical solutions, full-wave simulations, and microwave measurement results on 3D printed samples show omnidirectional invisibility in any configuration. This invisible metallic mesh can improve mechanical stability, electrical conduction, and heat dissipation of a system, without disturbing the electromagnetic design. Our approach is simple, robust, and scalable to higher frequencies.
authors.affiliation: Laboratory of Applied Research on Electromagnetics, Zhejiang University, Hangzhou 310027, China; Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139.
authors.forename: Dexin
authors.initials: D
authors.lastname: Ye
authors.affiliation: Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139 linglu@mit.edu joannop@mit.edu ranlx@zju.edu.cn.
authors.forename: Ling
authors.initials: L
authors.lastname: Lu
authors.affiliation: Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139 linglu@mit.edu joannop@mit.edu ranlx@zju.edu.cn.
authors.forename: John D
authors.initials: JD
authors.lastname: Joannopoulos
authors.affiliation: Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139.
authors.forename: Marin
authors.initials: M
authors.lastname: Soljačić
authors.affiliation: Laboratory of Applied Research on Electromagnetics, Zhejiang University, Hangzhou 310027, China; linglu@mit.edu joannop@mit.edu ranlx@zju.edu.cn.
authors.forename: Lixin
authors.initials: L
authors.lastname: Ran
keywords: invisible materials; metamaterials; scattering dark states