Nanostructured-membrane electron phase plates
Name
2001.01144.pdf
Description
Submitted version
Size
2.16 MB
Format
Adobe PDF
Checksum (MD5)
6e1b325906b0c19f4be789766eabcdff
Author(s)
Yang, Yujia
Kim, Chung-Soo
Hobbs, Richard G
Keathley, Phillip D
Berggren, Karl K
Date Issued
2020
Journal
Ultramicroscopy
Publisher
Elsevier BV
Version
Original manuscript
Abstract
© 2020 Elsevier B.V. Electron beams can acquire designed phase modulations by passing through nanostructured material phase plates. These phase modulations enable electron wavefront shaping and benefit electron microscopy, spectroscopy, lithography, and interferometry. However, in the fabrication of electron phase plates, the typically used focused-ion-beam-milling method limits the fabrication throughput and hence the active area of the phase plates. Here, we fabricated large-area electron phase plates with electron-beam lithography and reactive-ion-etching. The phase plates are characterized by electron diffraction in transmission electron microscopes with various electron energies, as well as diffractive imaging in a scanning electron microscope. We found the phase plates could produce a null in the center of the bright-field based on coherent interference of diffractive beams. Our work adds capabilities to the fabrication of electron phase plates. The nullification of the direct beam and the tunable diffraction efficiency demonstrated here also paves the way towards novel dark-field electron-microscopy techniques.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/J.ULTRAMIC.2020.113053
