Near Field Imaging

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Metamaterial endoscope for magnetic field transfer: near field imaging with magnetic wires

M. C. K. Wiltshire and J. V. Hajnal
Imaging Sciences Department, Imperial College London, Hammersmith Hospital, London


“We report on the development and use of a highly anisotropic magnetic metamaterial for near-field imaging. The material consists of an array of Swiss Roll structures, resonant near 21.3 MHz, with a peak value of relative permeability ~35. At this peak, the material transfers an input magnetic field pattern to the output face without loss of intensity and with a spatial resolution equal to the roll diameter. It behaves as a near-field imaging device consisting of a bundle of magnetic wires.”