  Hybrid metal-dielectric structures, which combine the advantages of both
metal and dielectric materials, support high-confined but low-loss magnetic and
electric resonances under deliberate arrangements. However, their potential for
enhancing magnetic emission has not been explored. Here, we study the
simultaneous magnetic and electric Purcell enhancement supported by a hybrid
structure consisting of a dielectric nanoring and a silver nanorod Such a
structure enables low Ohmic loss and highly-confined field under the mode
hybridization of magnetic resonances on nanoring and electric resonances on
nanorod in the optical communication band. So, the 60-fold magnetic Purcell
enhancement and 45-fold electric Purcell enhancement can be achieved
simultaneously with $>95\%$ of the radiation transmitted to far field. The
position of emitter has a several-ten-nanometer tolerance for sufficiently
large Purcell enhancement, which brings convenience to experimental
fabrications. Moreover, an array formed by this hybrid nanostructure can
further enhance the magnetic Purcell factors. The findings provide a
possibility to selectively excite the magnetic and electric emission in
integrated photon circuits. It may also facilitate brighter magnetic emission
sources and light-emitting metasurfaces in a simpler arrangement.
