Electric Levitation Using ε-Near-Zero Metamaterials

被引:55
作者
Rodriguez-Fortuno, Francisco J. [1 ,2 ]
Vakil, Ashkan [1 ]
Engheta, Nader [1 ]
机构
[1] Univ Penn, Dept Elect & Syst Engn, Philadelphia, PA 19104 USA
[2] Univ Politecn Valencia, Nanophoton Technol Ctr, Valencia 46022, Spain
关键词
OPTICAL LEVITATION; SURFACE; FORCES; PARTICLES; ATOMS; LIGHT;
D O I
10.1103/PhysRevLett.112.033902
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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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页数:5
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