Linear versus non-linear structural information limit in high-resolution transmission electron microscopy

Ultramicroscopy
S Van AertD Van Dyck

Abstract

A widely used performance criterion in high-resolution transmission electron microscopy (HRTEM) is the information limit. It corresponds to the inverse of the maximum spatial object frequency that is linearly transmitted with sufficient intensity from the exit plane of the object to the image plane and is limited due to partial temporal coherence. In practice, the information limit is often measured from a diffractogram or from Young's fringes assuming a weak phase object scattering beyond the inverse of the information limit. However, for an aberration corrected electron microscope, with an information limit in the sub-angstrom range, weak phase objects are no longer applicable since they do not scatter sufficiently in this range. Therefore, one relies on more strongly scattering objects such as crystals of heavy atoms observed along a low index zone axis. In that case, dynamical scattering becomes important such that the non-linear and linear interaction may be equally important. The non-linear interaction may then set the experimental cut-off frequency observed in a diffractogram. The goal of this paper is to quantify both the linear and the non-linear information transfer in terms of closed form analytical expressions. Wher...Continue Reading

References

Mar 1, 1988·Journal of Electron Microscopy Technique·A OurmazdC H Li
Jan 5, 2002·Ultramicroscopy·A J den DekkerP Geuens
Sep 29, 2004·Ultramicroscopy·J Verbeeck, S Van Aert
Aug 16, 2006·Physical Review Letters·S V StreltsovD I Khomskii
Jan 2, 2007·Ultramicroscopy·S Van AertJ R Jinschek
Sep 4, 2008·Physical Review Letters·B J KimE Rotenberg
Dec 27, 2008·Ultramicroscopy·S Van AertG Van Tendeloo

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Citations

Sep 10, 2013·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Huolin L XinHaimei Zheng
Oct 25, 2011·Journal of Controlled Release : Official Journal of the Controlled Release Society·Jung Seok Lee, Jan Feijen

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