The effect of electrostatic shielding using invisibility cloak
arXiv:1107.2868 · doi:10.1063/1.3658037
Abstract
The effect of electrostatic shielding for a spherical invisibility cloak with arbitrary charges inside is investigated. Our result reveals that the charge inside the cloak is a crucial factor to determine the detection. When charged bodies are placed inside the cloak with an arbitrary distribution, the electric fields outside are purely determined by the total charges just as the fields of a point charge at the center of the cloak. As the total charges reduce to zero, the bodies can not be detected. On the other hand, if the total charges are nonzero, the electrostatic potential inside an ideal cloak tends to infinity. For unideal cloaks, this embarrassment is overcome, while they still have good behaviors of shielding. In addition, the potential across the inner surface of an ideal cloak is discontinuous due to the infinite polarization of the dielectric, however it can be alternatively interpreted as the dual Meissner effect of a dual superconductive layer with a surface magnetic current.
7 pages, 8 figures
References in corpus (7)
- Full-wave simulations of electromagnetic cloaking structures
- Calculation of material properties and ray tracing in transformation media
- Confirmation of Cylindrical Perfect Invisibility Cloak Using Fourier-Bessel Analysis
- Full-wave invisibility of active devices at all frequencies
- Design and analytically full-wave validation of the invisibility cloaks, concentrators, and field rotators created with a general class of transformations
- Extraordinary surface voltage effect in the invisibility cloak with an active device inside
- The geodesic form of light-ray trace in the inhomogeneous media