The excitation of dark plasmons, i.e., coupled plasmon modes with a vanishing net dipole, is expected to favor Landau damping over radiative damping. Dark plasmon excitation might, therefore, lead to an increased absorption of energy within gold nanoparticles, resulting in a strong generation of hot electrons compared to the generation via bright plasmons. We performed transient-absorption spectroscopy on gold nanoparticle films to assess the initial electronic temperature before thermalization. We observe a significant increase in the electron–phonon coupling time when dark plasmon modes are excited in these films. The results indicate an efficient energy absorption due to the suppressed radiative decay of dark plasmon modes and a subsequent energy transformation into hot electrons.
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Dark plasmon modes for efficient hot electron generation in multilayers of gold nanoparticles
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14 February 2020
Research Article|
February 11 2020
Dark plasmon modes for efficient hot electron generation in multilayers of gold nanoparticles
Special Collection:
Emerging Directions in Plasmonics
Dominik Hoeing
;
Dominik Hoeing
a)
1
Institute for Physical Chemistry, Universität Hamburg
, Martin-Luther-King Platz 6, 20146 Hamburg, Germany
2
CUI: Advanced Imaging of Matter
, Luruper Chaussee 146, 22761 Hamburg, Germany
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Florian Schulz
;
Florian Schulz
1
Institute for Physical Chemistry, Universität Hamburg
, Martin-Luther-King Platz 6, 20146 Hamburg, Germany
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Niclas S. Mueller
;
Niclas S. Mueller
3
Department of Physics, Freie Universität Berlin
, Arnimallee 14, 14195 Berlin, Germany
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Stephanie Reich
;
Stephanie Reich
3
Department of Physics, Freie Universität Berlin
, Arnimallee 14, 14195 Berlin, Germany
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Holger Lange
Holger Lange
b)
1
Institute for Physical Chemistry, Universität Hamburg
, Martin-Luther-King Platz 6, 20146 Hamburg, Germany
2
CUI: Advanced Imaging of Matter
, Luruper Chaussee 146, 22761 Hamburg, Germany
b)Author to whom correspondence should be addressed: Holger.Lange@chemie.uni-hamburg.de
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a)
Electronic mail: Dominik.Hoeing@chemie.uni-hamburg.de
b)Author to whom correspondence should be addressed: Holger.Lange@chemie.uni-hamburg.de
Note: This paper is part of the JCP Special Topic on Emerging Directions in Plasmonics.
J. Chem. Phys. 152, 064710 (2020)
Article history
Received:
October 15 2019
Accepted:
January 22 2020
Citation
Dominik Hoeing, Florian Schulz, Niclas S. Mueller, Stephanie Reich, Holger Lange; Dark plasmon modes for efficient hot electron generation in multilayers of gold nanoparticles. J. Chem. Phys. 14 February 2020; 152 (6): 064710. https://doi.org/10.1063/1.5131696
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