Orbital angular momentum (OAM) plays a central role in regulating the magnetic state of electrons nonperiodic systems such as atoms and molecules. In solids, on other hand, OAM is usually quenched by crystal field, thus has negligible effect magnetization. Accordingly, it generally neglected discussions around band topology Berry curvature intrinsic anomalous Hall (AHE). Here, we present theore...

Structured light, especially beams carrying orbital angular momentum (OAM), has gained much interest due to its unique amplitude and phase structures. In terms of communication systems, multiple orthogonal OAM can be potentially utilized for increasing link capacity in different scenarios. This review describes challenges, advances, perspectives on aspects the OAM-based optical communications, ...