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

    研究成果: Article査読

    6 被引用数 (Scopus)


    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.

    ジャーナルApplied Physics Letters
    出版ステータスPublished - 2018 12月 3

    ASJC Scopus subject areas

    • 物理学および天文学(その他)


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