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Updated: May 7, 2026

Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
Experimental verification of isotropic radiation from a coherent dipole source via electric-field-driven LC resonator
Paul-Henri Tichit1, Shah Nawaz Burokur, Cheng-Wei Qiu
1IEF, CNRS, UMR 8622, University Paris-Sud, 91405 Orsay Cedex, France.
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.
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