  The interplay between light-matter, spin-orbit, and magnetic interactions
allows the investigation of light-induced magnetic phenomena that is otherwise
absent without irradiation. We present our analysis of light-driving effects on
the interlayer exchange coupling mediated by a bulk Rashba semiconductor in a
magnetic multilayer. The collinear magnetic exchange coupling mediated by the
photon-dressed spin-orbit coupled electrons of BiTeI develops light-induced
oscillation periods and displays new decay powers laws, both of which are
enhanced with an increasing light-matter coupling. For magnetic layers with
non-collinear magnetization, we find a non-collinear magnetic exchange coupling
uniquely generated by light-driving of the multilayer. As the non-collinear
magnetic exchange coupling mediated by the electrons of BiTeI is unique to the
irradiated system and it is enhanced with increasing light-matter coupling,
this effect offers a promising platform of investigation of light-driving
effects on magnetic phenomena in spin-orbit coupled systems.
