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Three-dimensional magnetic cloak working from d.c. to 250?kHz.

ABSTRACT: Invisible cloaking is one of the major outcomes of the metamaterial research, but the practical potential, in particular for high frequencies (for example, microwave to visible light), is fatally challenged by the complex material properties they usually demand. On the other hand, it will be advantageous and also technologically instrumental to design cloaking devices for applications at low frequencies where electromagnetic components are favourably uncoupled. In this work, we vastly develop the bilayer approach to create a three-dimensional magnetic cloak able to work in both static and dynamic fields. Under the quasi-static approximation, we demonstrate a perfect magnetic cloaking device with a large frequency band from 0 to 250?kHz. The practical potential of our device is experimentally verified by using a commercial metal detector, which may lead us to having a real cloaking application where the dynamic magnetic field can be manipulated in desired ways.

SUBMITTER: Zhu J

PROVIDER: S-EPMC4696515 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature

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Three-dimensional magnetic cloak working from d.c. to 250 kHz.

Zhu Jianfei J Jiang Wei W Liu Yichao Y Yin Ge G Yuan Jun J He Sailing S Ma Yungui Y

Nature communications 20151124

Invisible cloaking is one of the major outcomes of the metamaterial research, but the practical potential, in particular for high frequencies (for example, microwave to visible light), is fatally challenged by the complex material properties they usually demand. On the other hand, it will be advantageous and also technologically instrumental to design cloaking devices for applications at low frequencies where electromagnetic components are favourably uncoupled. In this work, we vastly develop th ...[more]

PMID: 26596641

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