High-dynamic-range water window ptychography

TL;DR

This paper demonstrates a method to significantly enhance the dynamic range of water window ptychography imaging using multiple exposures, leading to improved spatial resolution in soft X-ray imaging.

Contribution

The authors introduce a high-dynamic-range data acquisition technique that increases detector dynamic range by a factor of 76, enabling higher resolution imaging in water window ptychography.

Findings

Dynamic range increased by a factor of 76

Achieved diffraction signal up to detector corners

Improved real space resolution from 50 nm to 18 nm

Abstract

Ptychographic imaging with soft X-rays, especially in the water window energy range, suffers from limited detector dynamic range that directly influences the maximum spatial resolution achievable. High-dynamic-range data can be obtained by multiple exposures. By this approach we have increased the dynamic range of a ptychographic data set by a factor of 76 and obtained diffraction signal till the corners of the detector. The real space half period resolution was improved from 50 nm for the single exposure data to 18 nm for the high-dynamic-range data.