论文标题
Bragg相干调制成像高度应变的纳米晶 - 数值研究
Bragg Coherent Modulation Imaging for Highly Strained Nanocrystals-A Numerical Study
论文作者
论文摘要
Bragg相干衍射成像（BCDI）是一种独特而有力的方法，用于无损地跟踪三维应变场。尽管BCDI已成功地应用于许多科学研究领域并收到了很高的需求，但高度紧张的晶体的重建结果仍然受到很大的不确定性。在这里，报道了通过利用波前调制来提高BCDI对一般样品的适用性的进展。广泛的数值模拟表明，可以实现重建高应变模型纳米晶体的当前方法的显着改进。提出的方法高度抑制了歧义溶液的外观，并在相检索中表现出快速收敛和高鲁棒性。详细讨论了实施此方法的实验困难。
Bragg coherent diffraction imaging (BCDI) is a unique and powerful method for tracking three-dimensional strain fields non-destructively. While BCDI has been successfully applied to many scientific research fields and receives high demands, the reconstructed results for highly strained crystals are still subject to big uncertainties. Here, the 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 highly 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.
