Lin Huixiang, Lin Angyi, Jin Xiaoyu, Li Kui, Niu Jin, Li Jie, Zhang Xiaoshi, Liu Tao, Xu Wenhui, Zhang Fucai
State Key Laboratory of Quantum Functional Materials, Department of Electronic and Electrical Engineering, Southern University of Science and Technology, Shenzhen, China.
School of Physics and Astronomy, Yunnan University, Kunming, Yunnan, China.
Nat Commun. 2025 Jul 1;16(1):5714. doi: 10.1038/s41467-025-61339-3.
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.
X射线叠层成像术已成为X射线同步辐射装置上一种强大的成像工具。在实验室规模的X射线源上实施叠层成像术很大程度上受到其时间相干性差和通量低的阻碍。在此，我们提出一种结合结构化照明的超宽带方法，以增强叠层成像术对宽带源的鲁棒性。与其他方法不同，我们的超宽带叠层成像术方法能够在无需光光谱先验知识的情况下对色散样品进行成像。使用了一个60%带宽的光源和一个高次谐波极紫外光源来验证我们的方法。此外，我们的方法展示了精确的定量相位成像能力。所提出的方法将显著推动叠层成像术在实验室规模宽带X射线源上的实施，并拓宽其在生物医学和材料科学中的应用。
