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5 March 2022 Quantum surface-response in nanoplasmonics probed by electron spectroscopies
Paulo André Gonçalves, F. Javier García de Abajo
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Proceedings Volume PC12010, Photonic and Phononic Properties of Engineered Nanostructures XII; PC120101B (2022) https://doi.org/10.1117/12.2609060
Event: SPIE OPTO, 2022, San Francisco, California, United States
Abstract
State-of-the-art plasmonic nanosystems can now be realized with characteristic dimensions commensurate with intrinsic quantum mechanical length-scales associated with the underlying electron gas. Here, we present an original platform for inferring the quantum nonlocal response of metals directly from experimental measurements of EELS and cathodoluminescence. Capitalizing on the fact that free-electrons constitute first-class tunable near-field probes, we demonstrate how our theory can be employed for retrieving the metallic quantum surface-response [specifically, the surface-response functions d⊥(ω) and d∥(ω)], from the nonclassical features imprinted in the loss/emission spectra. We anticipate that such insight ought to be crucial for engineering nanodevices with few-nanometer footprint.
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Paulo André Gonçalves and F. Javier García de Abajo "Quantum surface-response in nanoplasmonics probed by electron spectroscopies", Proc. SPIE PC12010, Photonic and Phononic Properties of Engineered Nanostructures XII, PC120101B (5 March 2022); https://doi.org/10.1117/12.2609060
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KEYWORDS
Spectroscopy
Nanoplasmonics
Nanostructures
Plasmonics
Electrodynamics
Gold
Nanofabrication
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