利用明场叠层衍射成像实现 15 pm 的信息极限
Information limit of 15 pm achieved with bright-field ptychography
AI总结:
本研究在透射电子显微镜中仅利用明场圆盘,通过 multislice ptychography 实现了 15 pm 的信息极限,揭示了电子多重散射将高频信息编码至低角度散射电子中,从而打破了成像的衍射极限。
摘要:
通常认为,显微镜的高空间分辨率需要成像透镜或探测器具有大数值孔径。本研究中,在透射电子显微镜中仅利用明场圆盘(小数值孔径),通过 multislice ptychography 实现了 15 pm 的信息极限。结果表明,由于电子在物体中的多重散射,高频信息已被编码到散射至低角度的电子中,从而使得通过明场 ptychography 打破成像的衍射极限成为可能。
英文摘要:
It is generally assumed that a high spatial resolution of a microscope requires a large numerical aperture of the imaging lens or detector. In this study, the information limit of 15 pm is achieved in transmission electron microscopy using only the bright-field disk (small numerical aperture) via multislice ptychography. The results indicate that high-frequency information has been encoded in the electrons scattered to low angles due to the multiple scattering of electrons in the objects, making it possible to break the diffraction limit of imaging via bright-field ptychography.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。