Raman scattering is a powerful technique to probe optical phonons in solids. It usually involves electron-mediated process, involving photon, electron and phonon interactions. In principle, manipulating electrons, for instance by applying a magnetic field, should affect Raman phonon intensity, yet there is no direct experimental measurement. Recently Prof. Ward Plummer and Prof. Jiandi Zhang, through a collaboration with Prof. Qingming Zhang’ s group at Renmin University in Beijing, China, reported the first realization of the idea in a prototype material, MoS2. From monolayer and bilayer to bulk MoS2 they observed a dramatic modification of Raman phonon intensity induced by magnetic field. Such a giant magneto-optical effect appearing at a monoatomic layer level and its technological implications for magnetic-optical devices should inspire a new branch of inelastic light scattering. For detail, read the related published article in Proceedings of the National Academy of Sciences. Read more.