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Updated: Jun 1, 2026

Uncovering Hidden Dynamics of Natural Photonic Structures Using Holographic Imaging
Published on: March 31, 2022
A holographic biprism as a perfect energy filter?
Jo Verbeeck1, Giovanni Bertoni, Hannes Lichte
1EMAT, University of Antwerp, Groenenborgerlaan 171 B-2020, Antwerp, Belgium. jo.verbeeck@ua.ac.be
Abstract:
It has often been stated that a holographic biprism represents a near perfect energy filter and only elastically scattered electrons can participate in the interference fringes. This is based on the assumption that the reference wave does not contain inelastically scattered electrons. In this letter we show that this is not exactly true because of the delocalised inelastic interaction of the reference wave with the sample. We experimentally and theoretically show that inelastic scattering plays a role in the fringe formation, but it is shown that this contribution is small and can usually be neglected in practice.
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