Off-Axis X‑Ray\nVortex Beam Ptychography

Structured light has sparked interest\nby introducing\na parameter\nto adjust light–matter interactions in photonics applications.\nWhile phase structures applied to their wavefronts enable functional\nimaging probes, their application in X-ray microscopy has been limited\ndue to their complex configuration. Here, we present X-ray vortex\nbeam ptychography using an off-axis spiral zone plate, showcasing\nquantitative nanoscale imaging with straightforward manipulation of\nthe phase structure. The simple experimental setup enhances adaptability\nto most light sources. This coherent X-ray microscopy, capable of\nresolving nontrivial topological states with additional phase structures\nof light, is poised to advance photonics research by leveraging topological\nfeatures.