Atomic Floquet physics revealed by free electrons

• URL: http://arxiv.org/abs/2111.08675v1
• Date: Tue, 16 Nov 2021 18:20:35 GMT
• Title: Atomic Floquet physics revealed by free electrons
• Authors: Eduardo Arqu\'e L\'opez, Valerio Di Giulio, and F. Javier Garc\'ia de Abajo
• Abstract summary: We apply a quantum-mechanical formalism to describe the atom-electron interaction under the presence of a monochromatic classical light field. Our results unveil a wealth of effects associated with the interaction between free electrons and optically driven electronic systems.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We theoretically investigate the ability of free electrons to yield information on the nonlinear Floquet dynamics of atomic systems subject to intense external illumination. By applying a quantum-mechanical formalism to describe the atom-electron interaction under the presence of a monochromatic classical light field, we observe multiple energy features that reveal a large departure from non-illumination conditions in two- and three-level illuminated atoms, including the emergence of energy features associated with direct electron-photon exchanges, as well as a varied set of Floquet resonances that strongly depend on the light intensity and frequency. Our results unveil a wealth of effects associated with the interaction between free electrons and optically driven electronic systems.

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