Prospects of linear reconstruction in atomic resolution electron holographic tomography

被引：3

作者：

Krehl, Jonas ^{[1
]}

Lubk, Axel ^{[1
]}

机构：

[1] Tech Univ Dresden, Inst Struct Phys, Triebenberg Lab, Dresden, Germany

来源：

ULTRAMICROSCOPY | 2015年 / 150卷

关键词：

Electron holography; Tomography;

D O I：

10.1016/j.ultramic.2014.11.026

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

Tomography commonly requires a linear relation between the measured signal and the underlying specimen property; for Electron Holographic Tomography this is given by the Phase Grating Approximation (PGA). While largely valid at medium resolution, discrepancies arise at high resolution imaging conditions. We set out to investigate the artefacts that are produced if the reconstruction still assumes the PGA even with an atomic resolution tilt series. To forego experimental difficulties the holographic tilt series was simulated. The reconstructed electric potential clearly shows peaks at the positions of the atoms. These peaks have characterisitic deformations, which can be traced back to the defocus a particular atom has in the holograms of the tilt series. Exchanging an atom for one of a different atomic number results in a significant change in the reconstructed potential that is well contained within the atom's peak. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：65 / 70

页数：6

共 34 条

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