期刊
PHYSICAL REVIEW B
卷 83, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.115124
关键词
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资金
- Hong Kong RGC [600209]
- National Natural Science Foundation of China [10804131, 11074311, 10874250]
- Fundamental Research Funds for the Central Universities [2009300003161450]
- Guangdong Natural Science Foundation [10451027501005073]
We show that a metamaterial slab with arbitrary values of epsilon and mu behaves as a cloak at a finite frequency for a small object located sufficiently close to it due to the suppression of the object's optical excitations by enhanced reflections. Reflections due to propagating components can partially suppress the excitation, while evanescent components can cloak the object completely. In particular, a Veselago slab with epsilon = mu = -1 + i delta, as well as a class of anisotropic negative refractive index slabs, can completely cloak the small object placed within a finite distance from the slab when delta -> 0.
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