标题： 宽带连续光谱的ptychography电子伏特能量分辨率 显示英文标题

标题： Electron volt energy resolution with ptychography using a broadband continuum spectrum

摘要： 压缩全息术是一种扫描相干衍射成像技术，在电子、可见光和X射线领域成功应用。 与其它相干衍射技术相比，压缩全息术的一个显著特点是其能够通过重构算法处理部分空间和时间相干性。 在此，我们重点研究时间方面，并通过理论分析和模拟阐明影响压缩全息算法能量分辨率极限的约束条件。 基于此，我们设计并进行了硬X射线宽带压缩全息术的模拟，该方法可实现高达1 eV的能量分辨率。 我们通过从镍测试样品的实验压缩全息数据中提取具有5 eV能量分辨率的X射线吸收近边谱，对模拟结果进行了验证，使用的连续谱带宽为20 eV。 我们回顾了结果，讨论了局限性，并为未来的宽带压缩全息实验提供了指导，以及其前景应用和在实现衍射极限分辨率方面的潜在影响。 显示英文摘要

摘要： Ptychography is a scanning coherent diffraction imaging technique successfully applied in the electron, visible and x-ray regimes. One of the distinct features of ptychography with respect to other coherent diffraction techniques is its capability of dealing with partial spatial and temporal coherence via the reconstruction algorithm. Here we focus on the temporal and clarify theoretically and with simulations the constraints which affect the energy resolution limits of the ptychographic algorithms. Based on this, we design and perform simulations for a broadband ptychography in the hard x-ray regime, which enables an energy resolution down to 1 eV. We benchmark the simulations against experimental ptychographic data from a nickel test sample, by extracting the x-ray absorption near edge spectrum with energy resolution of 5 eV using a continuum spectrum of 20 eV bandwidth. We review the results, discuss the limitations, and provide guidelines for future broadband ptychography experiments, its prospective applications and potential impact on achieving diffraction limited resolutions.