Correction of aberration for a high-resolution electron hologram by means of the amplitude contrast criterion of image wave

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	Correction of aberration for a high-resolution electron hologram by means of the amplitude contrast criterion of image wave
	Y. M. Wang; K. Du; H. Q. Ye; H. Lichte
	2002
发表期刊	Micron
ISSN	0968-4328
卷号	33 期号:1 页码:15-21
摘要	In order to further improve the resolution for a high-resolution electron hologram, the aberration working on the hologram must be corrected. Since it is rather difficult to precisely control aberration coefficients in the experimental stage, we proposed an amplitude contrast D criterion of imaging wave to determine the working aberration from the hologram itself. In the determination or correction of the aberration, we assume a symmetrical aberration function is parameterized only by a spherical aberration coefficient and a defocus value. First, D is calculated from a holographically reconstructed imaging wave of YBa2Cu3O7-x for each combination of these parameters. The working aberration on the imaging wave is determined from the combination of the parameters by noting the maximum or minimum D of the imaging wave at some specifically chosen thickness regions. The theoretical validity for the D criterion is then proved with three-beam dynamical diffraction formula. Finally, the 'experimental' examination for the D criterion is successfully performed on the reconstructed image wave for the Sigma = 9 interface structure of a wedge-shaped silicon sample. (C) 2001 Elsevier Science Ltd. All rights reserved.
部门归属	chinese acad sci, atom imaging solids lab, inst met res, shenyang 110015, peoples r china. dresden univ technol, inst appl phys, d-01062 dresden, germany.;wang, ym (reprint author), chinese acad sci, atom imaging solids lab, inst met res, shenyang 110015, peoples r china
关键词	Electron Microscopy Correction Of Aberration Amplitude Contrast Criterion Microscope Space
URL	查看原文
WOS记录号	WOS:000171110600003
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36446
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. M. Wang,K. Du,H. Q. Ye,et al. Correction of aberration for a high-resolution electron hologram by means of the amplitude contrast criterion of image wave[J]. Micron,2002,33(1):15-21.
APA	Y. M. Wang,K. Du,H. Q. Ye,&H. Lichte.(2002).Correction of aberration for a high-resolution electron hologram by means of the amplitude contrast criterion of image wave.Micron,33(1),15-21.
MLA	Y. M. Wang,et al."Correction of aberration for a high-resolution electron hologram by means of the amplitude contrast criterion of image wave".Micron 33.1(2002):15-21.