Bragg coherent modulation imaging for highly strained nanocrystals: a numerical study

Bragg coherent diffraction imaging (BCDI) is a unique and powerful method for tracking 3D strain fields non-destructively. While BCDI has been successfully applied to many scientific research fields and is in high demand, the reconstructed results for highly strained crystals are still subject to su...

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Bibliographic Details
Published in:Journal of applied crystallography 2023-10, Vol.56 (5), p.1528-1536
Main Authors: Zhao, Jiangtao, Vartanyants, Ivan A., Zhang, Fucai
Format: Article
Language:English
Subjects:
Crystals
Mathematical models
Modulation
Nanocrystals
Phase retrieval
Robustness (mathematics)
Wave fronts
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Summary:Bragg coherent diffraction imaging (BCDI) is a unique and powerful method for tracking 3D strain fields non-destructively. While BCDI has been successfully applied to many scientific research fields and is in high demand, the reconstructed results for highly strained crystals are still subject to substantial uncertainties. Here, progress in improving the suitability of BCDI for general samples by exploiting wavefront modulation is reported. Extensive numerical simulations demonstrate that significant improvements over the current method for reconstructing highly strained model nanocrystals can be achieved. The proposed method strongly suppresses the appearance of ambiguous solutions, and exhibits fast convergence and high robustness in phase retrieval. Possible experimental difficulties in implementing this method are discussed in detail.
ISSN:1600-5767
0021-8898
1600-5767
DOI:10.1107/S1600576723007720