2016/12/11 by Armin Feist, Nora Bach, Nara Rubiano da Silva +12 · 10 citations
Biochemistry, Genetics and Molecular Biology · Engineering · #Advanced Electron Microscopy Techniques and Applications #Advanced Fluorescence Microscopy Techniques #Integrated Circuits and Semiconductor Failure Analysis
paper · doi:10.1016/j.ultramic.2016.12.005
openalex publication_date 2016/12/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
We present the development of the first ultrafast transmission electron microscope (UTEM) driven by localized photoemission from a field emitter cathode. We describe the implementation of the instrument, the photoemitter concept and the quantitative electron beam parameters achieved. Establishing a new source for ultrafast TEM, the Göttingen UTEM employs nano-localized linear photoemission from a Schottky emitter, which enables operation with freely tunable temporal structure, from continuous wave to femtosecond pulsed mode. Using this emission mechanism, we achieve record pulse properties in ultrafast electron microscopy of 9Å focused beam diameter, 200fs pulse duration and 0.6eV energy width. We illustrate the possibility to conduct ultrafast imaging, diffraction, holography and spectroscopy with this instrument and also discuss opportunities to harness quantum coherent interactions between intense laser fields and free-electron beams.