TY  - JOUR
AU  - Bangun, Arya
AU  - Melnykyz, Oleh
AU  - März, Benjamin
AU  - Diederichs, Benedikt
AU  - Clausen, Alexander
AU  - Weber, Dieter
AU  - Filbir, Frank
AU  - Muller-Caspary, Knut
TI  - Inverse Multislice Ptychography by Layer-wise Optimisation and Sparse Matrix Decomposition
JO  - IEEE transactions on computational imaging
VL  - 8
SN  - 2333-9403
CY  - [New York, NY]
PB  - IEEE
M1  - FZJ-2022-04494
SP  - 996 - 1011
PY  - 2022
AB  - We propose algorithms based on an optimisation method for inverse multislice ptychography in, e.g. electron microscopy. The multislice method is widely used to model the interaction between relativistic electrons and thick specimens. Since only the intensity of diffraction patterns can be recorded, the challenge in applying inverse multislice ptychography is to uniquely reconstruct the electrostatic potential in each slice up to some ambiguities. In this conceptual study, we show that a unique separation of atomic layers for simulated data is possible when considering a low acceleration voltage. We also introduce an adaptation for estimating the illuminating probe. For the sake of practical application, we finally present slice reconstructions using experimental 4D scanning transmission electron microscopy (STEM) data.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000888957200001
DO  - DOI:10.1109/TCI.2022.3218993
UR  - https://juser.fz-juelich.de/record/911182
ER  -