μeV electron spectromicroscopy using free-space light - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Nature Communications Année : 2023

μeV electron spectromicroscopy using free-space light

Résumé

The synergy between free electrons and light has recently been leveraged to reach an impressive degree of simultaneous spatial and spectral resolution, enabling applications in microscopy and quantum optics. However, the required combination of electron optics and light injection into the spectrally narrow modes of arbitrary specimens remains a challenge. Here, we demonstrate microelectronvolt spectral resolution with a sub-nanometer probe of photonic modes with quality factors as high as 10 4 . We rely on mode matching of a tightly focused laser beam to whispering gallery modes to achieve a 10 8 -fold increase in light-electron coupling efficiency. By adapting the shape and size of free-space optical beams to address specific physical questions, our approach allows us to interrogate any type of photonic structure with unprecedented spectral and spatial detail.
Fichier principal
Vignette du fichier
s41467-023-39979-0.pdf (1.83 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Licence : CC BY - Paternité

Dates et versions

hal-04234409 , version 1 (10-10-2023)

Licence

Paternité

Identifiants

Citer

Yves Auad, Eduardo J C Dias, Marcel Tencé, Jean-Denis Blazit, Xiaoyan Li, et al.. μeV electron spectromicroscopy using free-space light. Nature Communications, 2023, 14 (1), pp.4442. ⟨10.1038/s41467-023-39979-0⟩. ⟨hal-04234409⟩
12 Consultations
10 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More