Interpretable and efficient contrast in scanning transmission electron microscopy with a diffraction grating beamsplitter
Instrumentation and Detectors
2019-01-02 v1 Materials Science
Optics
Abstract
Efficient imaging of biomolecules, 2D materials and electromagnetic fields depends on retrieval of the phase of transmitted electrons. We demonstrate a method to measure phase in a scanning transmission electron microscope using a nanofabricated diffraction grating to produce multiple probe beams. The measured phase is more interpretable than phase-contrast scanning transmission electron microscopy techniques without an off-axis reference wave, and the resolution could surpass that of off-axis electron holography. We apply the technique to image nanoparticles, carbon sub- strates and electric fields. The contrast observed in experiments agrees well with contrast predicted in simulations.
Cite
@article{arxiv.1808.00370,
title = {Interpretable and efficient contrast in scanning transmission electron microscopy with a diffraction grating beamsplitter},
author = {Tyler R. Harvey and Fehmi S. Yasin and Jordan J. Chess and Jordan S. Pierce and Roberto M. S. dos Reis and Vasfi Burak Özdöl and Peter Ercius and Jim Ciston and Wenchun Feng and Nicholas A. Kotov and Benjamin J. McMorran and Colin Ophus},
journal= {arXiv preprint arXiv:1808.00370},
year = {2019}
}