Ptychography is a high-resolution imaging technique, which does not require lenses for image magnification and which provides phase contrast with high sensitivity. Here, we propose to use x-ray ptychography for the imaging of surface structure in crystalline samples. We show that ptychography can be used to image atomic step structures using coherent diffraction patterns recorded along the crystal truncation rod of a crystal surface. In a proof-of-concept experiment on a Pt (111) sample, we present ptychographic reconstructions showing features consistent with surface steps. Due to the penetration power of x-rays, this method could find interesting applications for the study of surface structures under buried interfaces or in harsh environments.
Ptychographic x-ray imaging of surfaces on crystal truncation rod
Chenhui Zhu, Ross Harder, Ana Diaz, Vladimir Komanicky, Andi Barbour, Ruqing Xu, Xiaojing Huang, Yaohua Liu, Michael S. Pierce, Andreas Menzel, Hoydoo You; Ptychographic x-ray imaging of surfaces on crystal truncation rod. Appl. Phys. Lett. 9 March 2015; 106 (10): 101604. https://doi.org/10.1063/1.4914927
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