Restoring Method of X-ray Absorption Fine Structures in Sparse Spectroscopic Ptychography

What is it about?

This paper proposes a novel method for restoring the spectrum structures from spectroscopic ptychography measurements with reduced energy points, by utilizing the Kramers–Kronig relationship. Spectrum restoration for the model and experimental EXAFS data obtained from spectroscopic ptychography measurements was also successfully demonstrated.

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Why is it important?

Spectroscopic ptychography method, a combination technique of X-ray ptychography imaging and the X-ray absorption spectroscopy, is one of the most promising and powerful tools for studying the chemical states and morphological structures of bulk materials at high resolutions. However, this technique still requires long measurement periods, because of insufficient coherent X-ray intensity. Although the improvements in hardware represent a critical solution, breakthroughs in software for experiments and analyses are also required.

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