Inelastic Mach-Zehnder Interferometry with Free Electrons
- URL: http://arxiv.org/abs/2110.02468v1
- Date: Wed, 6 Oct 2021 02:57:18 GMT
- Title: Inelastic Mach-Zehnder Interferometry with Free Electrons
- Authors: Cameron W. Johnson, Amy E. Turner, F. Javier Garc\'ia de Abajo, and
Benjamin J. McMorran
- Abstract summary: We use a novel scanning electron Mach-Zehnder interferometer constructed in a conventional transmission electron microscope to perform inelastic interferometric imaging with free electrons.
We show that the interference signal formed by inelastically scattered electrons is pi out of phase with respect to that formed by elastically scattered electrons.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We use a novel scanning electron Mach-Zehnder interferometer constructed in a
conventional transmission electron microscope to perform inelastic
interferometric imaging with free electrons. An electron wave function is
prepared in two paths that pass on opposite sides of a gold nanoparticle, where
plasmons are excited before the paths are recombined to produce electron
interference. We show that the measured spectra are consistent with theoretical
predictions, specifically that the interference signal formed by inelastically
scattered electrons is pi out of phase with respect to that formed by
elastically scattered electrons. This technique is sensitive to the phase of
localized optical modes because the interference signal amounts to a
substantial fraction of the transmitted electrons. We thus argue that inelastic
interferometric imaging with our scanning electron Mach-Zehnder interferometer
provides a new platform for controlling the transverse momentum of a free
electron and studying coherent electron-matter interactions at the nanoscale.
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