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Dynamic diffraction artefacts in Bragg coherent diffractive imaging
Author(s) -
Hu Wen,
Huang Xiaojing,
Yan Hanfei
Publication year - 2018
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s1600576718000274
Subject(s) - diffraction , optics , physics , extinction (optical mineralogy) , bragg's law , phase (matter) , coherent diffraction imaging , refraction , amplitude , phase retrieval , fourier transform , quantum mechanics
This article reports a theoretical study on the reconstruction artefacts in Bragg coherent diffractive imaging caused by dynamical diffraction effects. It is shown that, unlike the absorption and refraction effects that can be corrected after reconstruction, dynamical diffraction effects have profound impacts on both the amplitude and the phase of the reconstructed complex object, causing strong artefacts. At the dynamical diffraction limit, the reconstructed shape is no longer correct, as a result of the strong extinction effect. Simulations for hemispherical particles of different sizes show the type, magnitude and extent of the dynamical diffraction artefacts, as well as the conditions under which they are negligible.