Three-dimensional magnetic cloak working from DC to 250 kHz

Abstract

Invisible cloaking is one of major outcomes of the metamaterial research, but the practical potential, in particular for high frequencies (e.g., 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 favorably 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 zero 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.

arXiv comment16 pages and 5 figures

References in corpus (14)

• Optical Cloaking with Non-Magnetic Metamaterials
• Achieving transparency with plasmonic coatings
• Hiding Under the Carpet: a New Strategy for Cloaking
• Dielectric Optical Cloak
• Broadband Acoustic Cloak for Ultrasound Waves
• Silicon nanostructure cloak operating at optical frequencies
• Macroscopic Invisibility Cloaking of Visible Light
• Macroscopic Invisibility Cloak for Visible Light
• Experimental demonstration of a multiphysics cloak: manipulating heat flux and electric current simultaneously
• An omnidirectional retroreflector based on the transmutation of dielectric singularities
• A DC magnetic metamaterial
• Approaches to Three-Dimensional Transformation Optical Media Using Quasi-Conformal Coordinate Transformations
• First experimental demonstration of an isotropic electromagnetic cloak with strict conformal mapping
• Experimental demonstration of an ultra-thin three-dimensional thermal cloak

Cited by in corpus (5)

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• Magnetic illusion: transforming a magnetic object into another object by negative permeability
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• Negative permeability in magnetostatics and its experimental demonstration
• Implementation of ultra-broadband optical null media via space-folding