“…Fundamental properties of MI waves have been studied both theoretically and experimentally in metamaterials comprising magnetically coupled resonant meta-atoms such as split ring resonators (SRRs) or capacitively loaded loops 9 , 10 , 13 – 16 , including also nanostructured metamaterials 17 , 18 . Applications of MI waves include near-field imaging 19 , 20 , guiding 21 – 24 , and sensing 25 , 26 , wireless data or power transfer 27 – 29 , transducers 30 , amplifiers for MRI 31 , phase shifters 32 , polarisers 33 , and superdirective antennas 34 .…”