Abstract
Orbital angular momentum （OAM） of light is receiving much attention from the viewpoints not only of
fundamental physics but also of applications. Photonic structures are becoming important tools for
controlling/generating OAM in an efficient and stable manner. Here we overview some of schemes for
generating light with OAM using photonic structures such as metasurfaces and microring resonators.
We also discuss a possibility for generating light possessing OAM from a single quantum dot embedded
in a microring resonator or in a photonic crystal nanocavity.
