title: Experimental verification of isotropic radiation from a coherent dipole source via electric-field-driven LC resonator metamaterials.
abstract: It has long been conjectured that isotropic radiation by a simple coherent source is impossible due to changes in polarization. Though hypothetical, the isotropic source is usually taken as the reference for determining a radiator's gain and directivity. Here, we demonstrate both theoretically and experimentally that an isotropic radiator can be made of a simple and finite source surrounded by electric-field-driven LC resonator metamaterials designed by space manipulation. As a proof-of-concept demonstration, we show the first isotropic source with omnidirectional radiation from a dipole source (applicable to all distributed sources), which can open up several possibilities in axion electrodynamics, optical illusion, novel transformation-optic devices, wireless communication, and antenna engineering. Owing to the electric- field-driven LC resonator realization scheme, this principle can be readily applied to higher frequency regimes where magnetism is usually not present.
authors.affiliation: IEF, CNRS, UMR 8622, University Paris-Sud, 91405 Orsay Cedex, France.
authors.forename: Paul-Henri
authors.initials: PH
authors.lastname: Tichit
authors.forename: Shah Nawaz
authors.initials: SN
authors.lastname: Burokur
authors.forename: Cheng-Wei
authors.initials: CW
authors.lastname: Qiu
authors.forename: André
authors.initials: A
authors.lastname: de Lustrac