Artificial Magnetism via Mie Resonances

Achieving artificial magnetism is a long-standing aim of metamaterials research. Generally, artificial magnetism is realized by considering the average response of complex structures, such as arrays of subwavelength particles or split-rings. However, these standard approaches break down at deeply subwavelength scales. Here, we suggest a route for achieving artificial magnetism for near-field manipulations. We show that, at a Mie resonance, a highindex hollow sphere can support an outer near-field distribution accurately reproducing the one of a negative-permeability hollow sphere with the same size. Our results suggest a new strategy for developing magnetic devices for custom near-field manipulation.