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Description:

Photoluminescence Excitation spectroscopy (PLE) is crucial in understanding materials photo- physics, which play an important role in devices design and optimization. Unfortunately, PLE is handicapped by the diffraction limit when addressing the nanometric properties of matter, and no equivalent near-field spectroscopy has emerged so far. By coincidentally measuring the energy loss of a relativistic electron on optical materials (plasmonic nanoparticles, luminescent 2D materials) and their subsequent light emission, we demonstrate the possibility of making cathodolumines- cence excitation spectroscopy, a natural counterpart of PLE with a resolution better than 10 nm. The information retrieved should prove unvaluable for the understanding materials optics at the nanometer scale.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Optical excitations, photoluminescence, cathodoluminescence

Date published: 2022-10-07

Publisher: American Association for the Advancement of Science (AAAS)

Journal:

• Science Advances (ISSN: 23752548) vol. 8 issue. 40

Funding:

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1126/sciadv.abq4947

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Updated at: 2025-03-01 08:30:27 +0900

Published on MDR: 2025-03-01 08:30:27 +0900