Generation of extreme-ultraviolet beams with time-varying orbital angular momentum. - Rego, Laura; Dorney, Kevin M.; Brooks, Nathan J.; Nguyen, Quynh L.; Liao, Chen-Ting; Román, Julio San; Couch, David E.; Liu, Allison; Pisanty, Emilio; Lewenstein, Maciej; Plaja, Luis; Kapteyn, Henry C.; et al. (Science (pre-March 2025), 2019)