  We investigate electromagnetic scattering and plasmonic cloaking in a system
composed by a dielectric cylinder coated with a magneto-optical shell. In the
long-wavelength limit we demonstrate that the application of an external
magnetic field can not only switch on and off the cloaking mechanism but also
mitigate losses, as the absorption cross-section is shown to be minimal
precisely at the cloaking operation frequency band. We also show that the
angular distribution of the scattered radiation can be effectively controlled
by applying an external magnetic field, allowing for a swift change in the
scattering pattern. By demonstrating that these results are feasible with
realistic, existing magneto-optical materials, such as graphene epitaxially
grown on SiC, we suggest that magnetic fields could be used as an effective,
versatile external agent to tune plasmonic cloaks and to dynamically control
electromagnetic scattering in an unprecedented way, we hope that these results
may find use in disruptive photonic technologies.
