Journal
ULTRAMICROSCOPY
Volume 240, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.ultramic.2022.113580
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Funding
- JSPS KAKENHI [JP20H05659, JP17H06094, JP19H05788, JP20K15014]
- JST PRESTO [JPMJPR21AA]
- Kazato Research Foundation
- Australian Research Council [DP160102338]
- JSPS [JP21J22546, JP20J21517]
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This paper proposes a linear imaging theory for differential phase contrast under the weak-phase-weak-amplitude object approximation. It defines contrast transfer functions for thin and thick weak objects and discusses the defocus dependence of the contrast for several examples.
We propose a linear imaging theory for differential phase contrast under the weak-phase-weak-amplitude object approximation. Contrast transfer functions are defined for thin and thick weak objects, and they successfully describe several imaging characteristics of differential phase contrast. We discuss the defocus dependence of the contrast for several examples: atomic resolution, a p-n junction, a heterointerface, and grain boundaries. Understanding the imaging characteristics helps in adjusting aberrations in DPC STEM.
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