The key to optimizing spatial resolution in a state-of-the-art scanning transmission electron microscope is the ability to precisely measure and correct for electron optical aberrations of the probe-forming lenses. Several diagnostic methods for aberration measurement and correction with maximum precision and accuracy have been proposed, albeit often at the cost of relatively long acquisition times. Here, we illustrate how artificial intelligence can be used to provide near-real-time diagnosis of aberrations from individual Ronchigrams. The demonstrated speed of aberration measurement is important as microscope conditions can change rapidly, as well as for the operation of MEMS-based hardware correction elements that have less intrinsic stability than conventional electromagnetic lenses.
@article{arxiv.2204.11126,
title = {Near-real-time diagnosis of electron optical phase aberrations in scanning transmission electron microscopy using an artificial neural network},
author = {Giovanni Bertoni and Enzo Rotunno and Daan Marsmans and Peter Tiemeijer and Amir H. Tavabi and Rafal E. Dunin-Borkowski and Vincenzo Grillo},
journal= {arXiv preprint arXiv:2204.11126},
year = {2023}
}