Ultra-broadband ptychography for dispersive samples

Huixiang Lin, Angyi Lin, Xiaoyu Jin, Kui Li, Jin Niu, Jie Li, Xiaoshi Zhang, Tao Liu, Wenhui Xu and Fucai Zhang ()
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Huixiang Lin: Southern University of Science and Technology
Angyi Lin: Southern University of Science and Technology
Xiaoyu Jin: Southern University of Science and Technology
Kui Li: Yunnan University
Jin Niu: Chinese Academy of Sciences
Jie Li: Chinese Academy of Sciences
Xiaoshi Zhang: Yunnan University
Tao Liu: Southern University of Science and Technology
Wenhui Xu: Paul Scherrer Institut
Fucai Zhang: Southern University of Science and Technology

Nature Communications, 2025, vol. 16, issue 1, 1-10

Abstract: Abstract X-ray ptychography has emerged as a powerful imaging tool on X-ray synchrotron facilities. Implementation of ptychography on laboratory-scale X-ray sources has largely been hindered by their poor temporal coherence and low flux. Here we propose an ultra-broadband method incorporating structured illumination to enhance the robustness of ptychography to broadband sources. Different from other methods, our ultra-broadband ptychography method enables imaging of dispersive samples without prior knowledge of light spectra. A 60% bandwidth light source and a high harmonic extreme ultraviolet source were used to validate our method. Moreover, our method demonstrates precise quantitative phase imaging capabilities. The proposed method will significantly advance the implementation of ptychography on laboratory-scale broadband X-ray sources and widen its applications in biomedicine and materials science.

Date: 2025
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DOI: 10.1038/s41467-025-61339-3

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