Interpretable and Efficient Interferometric Contrast in Scanning Transmission Electron Microscopy with a Diffraction-Grating Beam Splitter
Journal Article
·
· Physical Review Applied
- Univ. of Oregon, Eugene, OR (United States); Georg-August-Universität Göttingen (Germany)
- Univ. of Oregon, Eugene, OR (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Univ. of Michigan, Ann Arbor, MI (United States); US Food and Drug Administration, Silver Spring, MD (United States)
- Univ. of Michigan, Ann Arbor, MI (United States)
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. Here, 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.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- AC02-05CH11231; SC0014664
- OSTI ID:
- 1465466
- Journal Information:
- Physical Review Applied, Journal Name: Physical Review Applied Journal Issue: 6 Vol. 10; ISSN 2331-7019; ISSN PRAHB2
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Four-Dimensional Scanning Transmission Electron Microscopy (4D-STEM): From Scanning Nanodiffraction to Ptychography and Beyond
|
journal | May 2019 |
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