352 citations · 441 across the 7 of their papers we have counts for
8 papers
Improved Three-Dimensional Reconstructions in Electron Ptychography through Defocus Series Measurements
Marcel Schloz, Thomas C. Pekin, Hamish G. Brown +9
A detailed analysis of ptychography for 3D phase reconstructions of thick specimens is performed. We introduce multi-focus ptychography, which incorporates a 4D-STEM defocus series…
Electron Ptychography Reveals Correlated Lattice Vibrations at Atomic Resolution
Anton Gladyshev, Benedikt Haas, Thomas C. Pekin +4
In this paper we introduce an electron ptychography reconstruction framework, CAVIAR -- Correlated Atomic Vibration Imaging with sub-Angstrom Resolution -- that reveals an entirely…
Lossy Compression of Electron Diffraction Patterns for Ptychography via Change of Basis
Anton Gladyshev, Thomas C. Pekin, Marcel Schloz +3
Ptychography is a computational imaging technique that has risen in popularity in the x-ray and electron microscopy communities in the past half decade. One of the reasons for this…
Deep Reinforcement Learning for Data-Driven Adaptive Scanning in Ptychography
Marcel Schloz, Johannes Müller, Thomas C. Pekin +2
We present a method that lowers the dose required for a ptychographic reconstruction by adaptively scanning the specimen, thereby providing the required spatial information redunda…
Fast Grain Mapping with Sub-Nanometer Resolution Using 4D-STEM with Grain Classification by Principal Component Analysis and Non-Negative Matrix Factorization
Frances I Allen, Thomas C Pekin, Arun Persaud +5
High-throughput grain mapping with sub-nanometer spatial resolution is demonstrated using scanning nanobeam electron diffraction (also known as 4D scanning transmission electron mi…
A single-projection three-dimensional reconstruction algorithm for scanning transmission electron microscopy data
Hamish G. Brown, Philipp M. Pelz, Shang-Lin Hsu +13
Increasing interest in three-dimensional nanostructures adds impetus to electron microscopy techniques capable of imaging at or below the nanoscale in three dimensions. We present…
Overcoming information reduced data and experimentally uncertain parameters in ptychography with regularized optimization
Marcel Schloz, Thomas C. Pekin, Zhen Chen +3
The overdetermination of the mathematical problem underlying ptychography is reduced by a host of experimentally more desirable settings. Furthermore, reconstruction of the sample-…
py4DSTEM: a software package for multimodal analysis of four-dimensional scanning transmission electron microscopy datasets
Benjamin H Savitzky, Lauren A Hughes, Steven E Zeltmann +18
Scanning transmission electron microscopy (STEM) allows for imaging, diffraction, and spectroscopy of materials on length scales ranging from microns to atoms. By using a high-spee…