Steven Zeltmann

I am currently the Staff Scientist for Electron Microscopy at PARADIM, an NSF user facility focused on the design and realization of novel interface materials. In addition, I work as a research associate in the group of David Muller in the Applied & Engineering Physics department. I am one of the core developers of py4DSTEM, the premier open source toolkit for 4D-STEM analysis. Previously, I completed my doctorate at the University of California, Berkeley, under Andy Minor and in close collaboration with Colin Ophus.

My research focuses broadly on the development of novel imaging and structural analysis techniques based on four-dimensional scanning transmission electron microscopy (4D-STEM). 4D-STEM is both an experimental and a computational task, and my work has covered both aspects of the technique. I have worked variously on multiple scattering (diffraction) theory, imaging theory, high-performance computing, experimental technique development, novel data analyses, direct electron detector development, and ptychography. I have had a special focus on making 4D-STEM structural measurements robust to multiple scattering. Recently, I have been particularly working on developing new low-dose phase contrast imaging with 4D-STEM.