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

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.

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Publication details

The article was received on 24 Oct 2018, accepted on 15 Nov 2018 and first published on 15 Nov 2018


Article type: Paper
DOI: 10.1039/C8FD00158H
Citation: Faraday Discuss., 2018, Accepted Manuscript
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    Dynamics of electron-emission currents in plasmonic gaps induced by strong fields

    G. Aguirregabiria, D. C. Marinica, M. Ludwig, D. Brida, A. Leitenstorfer, J. Aizpurua and A. Borisov, Faraday Discuss., 2018, Accepted Manuscript , DOI: 10.1039/C8FD00158H

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