dc.contributor.author
Pincelli, Tommaso
dc.contributor.author
Vasileiadis, Thomas
dc.contributor.author
Dong, Shuo
dc.contributor.author
Beaulieu, Samuel
dc.contributor.author
Dendzik, Maciej
dc.contributor.author
Zahn, Daniela
dc.contributor.author
Seiler, Hélène
dc.contributor.author
Mueller, Niclas S. S.
dc.contributor.author
Okamura, Yu
dc.contributor.author
Reich, Stephanie
dc.date.accessioned
2023-04-12T07:14:06Z
dc.date.available
2023-04-12T07:14:06Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/38007
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-37723
dc.description.abstract
Hybrid plasmonic devices involve a nanostructured metal supporting localized surface plasmons to amplify light–matter interaction, and a non-plasmonic material to functionalize charge excitations. Application-relevant epitaxial heterostructures, however, give rise to ballistic ultrafast dynamics that challenge the conventional semiclassical understanding of unidirectional nanometal-to-substrate energy transfer. Epitaxial Au nanoislands are studied on WSe2 with time- and angle-resolved photoemission spectroscopy and femtosecond electron diffraction: this combination of techniques resolves material, energy, and momentum of charge-carriers and phonons excited in the heterostructure. A strong non-linear plasmon–exciton interaction that transfers the energy of sub-bandgap photons very efficiently to the semiconductor is observed, leaving the metal cold until non-radiative exciton recombination heats the nanoparticles on hundreds of femtoseconds timescales. The results resolve a multi-directional energy exchange on timescales shorter than the electronic thermalization of the nanometal. Electron–phonon coupling and diffusive charge-transfer determine the subsequent energy flow. This complex dynamics opens perspectives for optoelectronic and photocatalytic applications, while providing a constraining experimental testbed for state-of-the-art modelling.
en
dc.format.extent
12 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by-nc/4.0/
dc.subject
2D semiconductors
en
dc.subject
femtosecond electron diffraction
en
dc.subject
hybrid plasmonics
en
dc.subject
interfacial charge transfer
en
dc.subject
light–matter interactions
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::530 Physik::530 Physik
dc.title
Observation of Multi-Directional Energy Transfer in a Hybrid Plasmonic–Excitonic Nanostructure
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
2209100
dcterms.bibliographicCitation.doi
10.1002/adma.202209100
dcterms.bibliographicCitation.journaltitle
Advanced Materials
dcterms.bibliographicCitation.number
9
dcterms.bibliographicCitation.volume
35
dcterms.bibliographicCitation.url
https://doi.org/10.1002/adma.202209100
refubium.affiliation
Physik
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
1521-4095
refubium.resourceType.provider
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