Demonstration of a Dual-Beam Zone Plate for Phase-Sensitive Coherent Soft X-ray Imaging
ORAL
Abstract
Coherent X-ray imaging is pivotal for delineating spatial distributions of order parameters in quantum materials, yet conventional methods, such as iterative phase retrieval and ptychography, are notably time-intensive and complex. Our innovative dual-beam zone plate (DBZ) simultaneously structures the beam into two focused spots with known phase coherence and directly acquires real-space images, bypassing iterative algorithms and streamlining diffraction imaging. Experimental validations at the COSMIC Beamline (for coherent X-ray imaging) at the Advanced Light Source have served as a proof of principle, showing diffraction fringes akin to a Young's double-slit experiment and resolving distinct phase shifts along with detecting atomic edge spectra across various samples. These findings affirm the DBZ's efficiency in capturing fine structural details. Looking forward, this technology promises to significantly enhance the speed and sensitivity of coherent X-ray imaging, making it ideal for investigating the dynamic heterogeneities in quantum materials. This method holds substantial promise for broad applications, including in-situ studies of domain dynamics and kinetic phenomena within complex electronic systems.
*This work is supported by an Early Career Award in the X-Ray Instrumentation Program, in the Science User Facility Division of the Office of Basic Energy Sciences of the U.S. Department of Energy, under Contract No. DE-AC02-05CH11231.
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Publication:M. Bluschke et al. Imaging mesoscopic antiferromagnetic spin textures in the dilute limit from single-geometry resonant coherent x-ray diffraction. Sci. Adv. 8, eabn6882 (2022). Y.H. Lo, L. Zhao, M. Gallagher-Jones et al. In situ coherent diffractive imaging. Nat. Commun. 9, 1826 (2018). N. Burdet et al. Soft x-ray interferometry of magnetic nano-materials. ALS User Meeting (2018). C. Chang et al. Direct measurement of index of refraction in the extreme-ultraviolet wavelength region with a novel interferometer. Opt. Lett. 27, 1028-1030 (2002). A. Scherz et al. Phase imaging of magnetic nanostructures using resonant soft x-ray holography. Phys. Rev. B. 76.214410 (2007). S. Woo, S. et al. Observation of room-temperature magnetic skyrmions and their current-driven dynamics in ultrathin metallic ferromagnets. Nat. Mat. 15, 501–506 (2016). G. Mattoni et al. Striped nanoscale phase separation at the metal–insulator transition of heteroepitaxial nickelates. Nat. Commun. 7, 13141 (2016).
