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Volume 214, 2019
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Dynamics of electron-emission currents in plasmonic gaps induced by strong fields

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Abstract

The dynamics of ultrafast electron currents triggered by femtosecond laser pulse irradiation of narrow gaps in a plasmonic dimer is studied using quantum mechanical Time-Dependent Density Functional Theory (TDDFT). The electrons are injected into the gap due to the optical field emission from the surfaces of the metal nanoparticles across the junction. Further evolution of the electron currents in the gap is governed by the locally enhanced electric fields. The combination of TDDFT and classical modelling of the electron trajectories allows us to study the quiver motion of the electrons in the gap region as a function of the Carrier Envelope Phase (CEP) of the incident pulse. In particular, we demonstrate the role of the quiver motion in establishing the CEP-sensitive net electric transport between nanoparticles.

Graphical abstract: Dynamics of electron-emission currents in plasmonic gaps induced by strong fields

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Submitted
24 Oct 2018
Accepted
15 Nov 2018
First published
15 Nov 2018

Faraday Discuss., 2019,214, 147-157
Article type
Paper

Dynamics of electron-emission currents in plasmonic gaps induced by strong fields

G. Aguirregabiria, D. Marinica, M. Ludwig, D. Brida, A. Leitenstorfer, J. Aizpurua and A. G. Borisov, Faraday Discuss., 2019, 214, 147
DOI: 10.1039/C8FD00158H

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