Sandberg R L, Raymondson D A, La-O-Vorakiat C, Paul A, Raines K S, Miao J, Murnane M M, Kapteyn H C, Schlotter W F
Deparment of Physics and JILA, University of Colorado at Boulder, Colorado, USA.
Opt Lett. 2009 Jun 1;34(11):1618-20. doi: 10.1364/ol.34.001618.
We present what we believe to be the first implementation of Fourier transform (FT) holography using a tabletop coherent x-ray source. By applying curvature correction to compensate for the large angles inherent in high-NA coherent imaging, we achieve image resolution of 89 nm using high-harmonic beams at a wavelength of 29 nm. Moreover, by combining holography with iterative phase retrieval, we improve the image resolution to <53 nm. We also demonstrate that FT holography can be used effectively with short exposure times of 30 s. This technique will enable biological and materials microscopy with simultaneously high spatial and temporal resolution on a tabletop soft-x-ray source.
我们展示了我们认为首次使用桌面相干X射线源实现的傅里叶变换（FT）全息术。通过应用曲率校正来补偿高数值孔径相干成像中固有的大角度，我们使用波长为29nm的高次谐波光束实现了89nm的图像分辨率。此外，通过将全息术与迭代相位恢复相结合，我们将图像分辨率提高到<53nm。我们还证明了FT全息术可以在30秒的短曝光时间内有效使用。这项技术将使在桌面软X射线源上同时实现高空间和时间分辨率的生物和材料显微镜检查成为可能。
