Efficient use of coherent X-rays in ptychography: Towards high-resolution and high-throughput observation of weak-phase objects
Efficient use of coherent X-rays in ptychography: Towards high-resolution and high-throughput observation of weak-phase objects
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DOI：
10.1063/1.4942105
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发表时间：
2016-02-15
影响因子：
4
通讯作者：
Takahashi, Yukio
中科院分区：
文献类型：
--
作者：
Burdet, Nicolas;Shimomura, Kei;Takahashi, Yukio
有效利用相干X射线是同步加速器设备中的光刻技术的一个关键问题。我们提出了一种优化相干模群以获得最佳分辨率的方法。我们通过波动光学模拟表明，近衍射极限聚焦X射线光束的强度可以描述为几个正交模的非相干和，并且通过放宽对相干度的要求，第一模通量在次源尺寸内显著增加。我们用同步加速器X射线多模光刻技术对其进行了实验验证，实现了对弱相位物体的高分辨率成像。这种方法能够对材料科学和生物学中的弱相物体进行高分辨率和高通量的观测。(C)2016年作者(S)。
The efficient use of coherent X-rays is a crucial issue for ptychography at synchrotron facilities. We propose a method for optimizing the population of coherent modes for an optimal resolution. We show by a wave optical simulation that the intensity of a nearly diffraction-limited focusing X-ray beam can be described as an incoherent sum of a few orthogonal modes and that the first-mode flux significantly increases within a secondary source size by relaxing the requirement on the degree of coherence. We experimentally demonstrate it by means of multiple-mode ptychography with a synchrotron X-ray and achieve the high-resolution imaging of a weak-phase object. The present approach enables the high-resolution and high-throughput observation of weak-phase objects in materials science and biology. (C) 2016 Author(s).