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Published on: July 27, 2018
Atomiclike Selection Rules in Free Electron Scattering
Simon Garrigou1, Hugo Lourenço-Martins1
1Université de Toulouse, CEMES, -CNRS, CNRS, Toulouse, France.
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 subwavelength scale. In this Letter, 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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