Electric Levitation Using e-Near-Zero Metamaterials
Francisco J. Rodríguez-Fortuño, Ashkan Vakil, Nader Engheta
PHYSICAL REVIEW LETTERS
Volume: 112, Issue: 3, 24 January 2014
033902 - 033902-5
The ability to manufacture metamaterials with exotic electromagnetic properties has potential for surprising new applications. Here we report how a specific type of metamaterial—one whose permittivity is near zero—exerts a repulsive force on an electric dipole source, resulting in levitation of the dipole. The phenomenon relies on the expulsion of the time-varying electric field from the metamaterial interior, resembling the perfect diamagnetic expulsion of magnetostatic fields. Leveraging this concept, we study some realistic requirements for the levitation or repulsion of a polarized particle radiating at any frequency, from microwave to optics.
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