A tunable path-separated electron interferometer with an amplitude-dividing grating beamsplitter

Fehmi S. Yasin, Ken Harada, Daisuke Shindo, Hiroyuki Shinada, Benjamin J. McMorran, Toshiaki Tanigaki

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    We demonstrate a tunable path-separated electron interferometer using a single amplitude-dividing beamsplitter to prepare multiple spatially isolated, coherent electron probe beams. We place four electrostatic bi-prisms in the optical column of a scanning transmission electron microscope (STEM) to achieve path separations of up to 25 μm, the largest demonstrated within amplitude-division electron interferometers while maintaining fringe visibility of the directly observed interference fringes at the detector. We characterize the fringe visibility of this setup over a range of path separations and perform STEM holography to reconstruct the full object wave of a fabricated Si ramp test phase object. We report a quantitative object-wave measurement in this configuration and confirm with an independent off-axis electron holography measurement. This experimental design can potentially be applied to high-resolution phase imaging and fundamental physics experiments, such as an exploration of the electron wave packet coherence length and the Aharonov-Bohm effect.

    Original languageEnglish
    Article number233102
    JournalApplied Physics Letters
    Volume113
    Issue number23
    DOIs
    Publication statusPublished - 2018 Dec 3

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    Fingerprint Dive into the research topics of 'A tunable path-separated electron interferometer with an amplitude-dividing grating beamsplitter'. Together they form a unique fingerprint.

    Cite this