Günther, B., Hehn, L., Jud, C., Hipp, A., Dierolf, M., & Pfeiffer, F. (2019). Full-field structured-illumination super-resolution X-ray transmission microscopy. Nature communications, 10(1), 2494. https://doi.org/10.1038/s41467-019-10537-x
Purpose: Instead of using a single isolated pencil beam, creating a whole periodic array of such beams allows for simultaneous illumination of larger parts of the specimen also in a STXM, similar in concept to multi-beam scanning electron microscopy. The signals from the multiple beams have to be recorded with a two-dimensional detector on which the contributions of the individual beams have to be separable. A complete image is obtained by scanning the specimen over one period of the array of illuminating beamlets. Therefore, acquisition time can be drastically reduced if these beamlets are spaced closely, i.e. on the order of micrometres.
Figure: Schematic of the experimental set-up used. X-rays emerging from an undulator are monochromatized and propagating to the triangularly shaped grating, which can be moved in the horizontal direction with a piezo-electric actuator