Atomic-like selection rules in free electron scattering

2024/11/18 by Simon Garrigou, Garrigou, Simon, Hugo Lourenço‐Martins +1
Engineering · Materials Science · Physics and Astronomy · #Advanced Materials Characterization Techniques #Electron and X-Ray Spectroscopy Techniques #FOS: Physical sciences #Optics (physics.optics) #Surface and Thin Film Phenomena

paper · pdf · doi:10.48550/arxiv.2411.11754

openalex publication_date 2024/11/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Phase-shaped electron energy-loss spectroscopy (PSEELS) measures the scattering probability of structured free electron beams by a target. Over the last decade, it was shown that this scheme can be employed to emulate polarized optical spectroscopies with electrons, and therefore to transpose macroscopic optical concepts - such as dichroism - down to the deep sub-wavelength scale. In this work, we theoretically demonstrate that PSEELS can, in fact, go way further than mimicking optics and enables to map a plethora of so far inaccessible nano-optical quantities such as the electric quadrupolar momentum.

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