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Article Dans Une Revue Nature Communications Année : 2023

Lorentz microscopy of optical fields

Sergey Yalunin
  • Fonction : Auteur
Armin Feist
Murat Sivis
Thorsten Hohage
F. Javier García de Abajo
Claus Ropers

Résumé

Abstract In electron microscopy, detailed insights into nanoscale optical properties of materials are gained by spontaneous inelastic scattering leading to electron-energy loss and cathodoluminescence. Stimulated scattering in the presence of external sample excitation allows for mode- and polarization-selective photon-induced near-field electron microscopy (PINEM). This process imprints a spatial phase profile inherited from the optical fields onto the wave function of the probing electrons. Here, we introduce Lorentz-PINEM for the full-field, non-invasive imaging of complex optical near fields at high spatial resolution. We use energy-filtered defocus phase-contrast imaging and iterative phase retrieval to reconstruct the phase distribution of interfering surface-bound modes on a plasmonic nanotip. Our approach is universally applicable to retrieve the spatially varying phase of nanoscale fields and topological modes.

Dates et versions

hal-04296151 , version 1 (20-11-2023)

Identifiants

Citer

John Gaida, Hugo Lourenço-Martins, Sergey Yalunin, Armin Feist, Murat Sivis, et al.. Lorentz microscopy of optical fields. Nature Communications, 2023, 14 (1), pp.6545. ⟨10.1038/s41467-023-42054-3⟩. ⟨hal-04296151⟩
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