  All-dielectric resonant nanophotonics is a rapidly developing research field
driven by its exceptional application potential for low-loss nanoscale
metadevices. The tight confinement of the local electromagnetic fields and
interferences in resonant photonic nanostructures can boost many optical
effects, thus offering novel opportunities for the subwavelength control of
light-matter-interactions. Active, light-emitting nanoscale structures are of
particular interest, as they offer unique opportunities for novel types of
light sources and nanolasers. Here, we review the latest advances in this
recently emerged and rapidly growing field of active dielectric resonant
nanophotonics enabled by dipolar and multipolar Mie-type resonances. More
specifically, we discuss how to employ dielectric nanostructures for the
resonant control of emission from quantum dots, two-dimensional transition
metal dichalcogenides, and halide perovskites. We also foresee various future
research directions and applications of active all-dielectric resonant
nanostructures including but not limited to lasing in topologically robust
systems, light-matter interactions beyond the electric dipole limit,
light-emitting surfaces, and tunable active metadevices.
