Takazawa Shuntaro, Kang Jungmin, Abe Masaki, Uematsu Hideshi, Ishiguro Nozomu, Takahashi Yukio
Opt Express. 2021 May 10;29(10):14394-14402. doi: 10.1364/OE.419998.
Coherent diffraction imaging (CDI) is a powerful method for visualizing the structure of an object with a high spatial resolution that exceeds the performance limits of the lens. Single-frame CDI in the X-ray region has potential use for probing dynamic phenomena with a high spatiotemporal resolution. Here, we experimentally demonstrate a general method for single-frame X-ray CDI using a triangular aperture and a Fresnel zone plate. Using 5 keV synchrotron radiation X-rays, we reconstructed the object image of the locally illuminated area with a spatial resolution of higher than 50 nm and an exposure time of more than 0.1 s without prior information about the sample. After a 10 s exposure, a resolution of 17 nm was achieved. The present method opens new frontiers in the study of dynamics at the nanoscale by using next-generation synchrotron radiation X-rays/free-electron lasers as light sources.
相干衍射成像（CDI）是一种强大的方法，可用于以超过透镜性能极限的高空间分辨率可视化物体的结构。X射线区域的单帧CDI在以高时空分辨率探测动态现象方面具有潜在用途。在此，我们通过实验展示了一种使用三角形孔径和菲涅耳波带片进行单帧X射线CDI的通用方法。使用5 keV同步辐射X射线，我们在没有关于样品的先验信息的情况下，以高于50 nm的空间分辨率和超过0.1 s的曝光时间重建了局部照明区域的物体图像。经过10 s的曝光，实现了17 nm的分辨率。本方法通过使用下一代同步辐射X射线/自由电子激光作为光源，为纳米尺度动力学的研究开辟了新的前沿领域。
