Design and simulation of a linear electron cavity for quantum electron microscopy

Marco Turchetti, Chung Soo Kim, Richard Hobbs, Yujia Yang, Pieter Kruit, Karl K. Berggren

    Research output: Contribution to journalArticleScientificpeer-review

    Abstract

    Quantum electron microscopy (QEM) is a measurement approach that could reduce sample radiation damage, which represents the main obstacle to sub-nanometer direct imaging of molecules in conventional electron microscopes. This method is based on the exploitation of interaction-free measurements in an electron resonator. In this work, we present the design of a linear resonant electron cavity, which is at the core of QEM. We assess its stability and optical properties during resonance using ray-tracing electron optical simulations. Moreover, we analyze the issue of spherical aberrations inside the cavity and we propose and verify through simulation two possible approaches to the problem. Finally, we discuss some of the important design parameters and constraints, such as conservation of temporal coherence and effect of alignment fields.

    Original languageEnglish
    Pages (from-to)50-61
    JournalUltramicroscopy
    Volume199
    DOIs
    Publication statusPublished - 2019

    Keywords

    • Interaction-free measurement
    • Quantum electron microscopy
    • Radiation damage
    • Spherical aberration

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