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Zeitschriftenartikel:

F. Schmidt, A. Losquin, M. Horák, U. Hohenester, M. Stöger-Pollach, J. Krenn:
"Fundamental Limit of Plasmonic Cathodoluminescence";
Nano Letters, 21 (2021), S. 590 - 596.



Kurzfassung englisch:
We use cathodoluminescence (CL) spectroscopy in a transmission
electron microscope to probe the radial breathing mode of plasmonic
silver nanodisks. A two-mirror detection system sandwiching the sample collects
the CL emission in both directions, that is, backward and forward with respect
to the electron beam trajectory. We unambiguously identify a spectral shift of
about 8 nm in the CL spectra acquired from both sides and show that this
asymmetry is induced by the electron beam itself. By numerical simulations, we
confirm the observations and identify the underlying physical effect due to the
interference of the CL emission patterns of an electron-beam-induced dipole
and the breathing mode. This effect can ultimately limit the achievable fidelity
in CL measurements on any system involving multiple excitations and should therefore be considered with care in high-precision
experiments.

Schlagworte:
Cathodoluminescence, transmission electron microscopy, plasmonics, radial breathing mode, nanoparticles.


"Offizielle" elektronische Version der Publikation (entsprechend ihrem Digital Object Identifier - DOI)
http://dx.doi.org/10.1021/acs.nanolett.0c04084


Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.