Probing energy dissipation in molecular-scale junctions via surface enhanced Raman spectroscopy: vibrational pumping and hot carrier enhanced light emission.
energy dissipation
hot carriers
molecular junction
surface enhanced Raman spectroscopy
vibrational modes
Journal
Journal of physics. Condensed matter : an Institute of Physics journal
ISSN: 1361-648X
Titre abrégé: J Phys Condens Matter
Pays: England
ID NLM: 101165248
Informations de publication
Date de publication:
29 Jan 2021
29 Jan 2021
Historique:
received:
05
11
2020
accepted:
11
01
2021
pubmed:
12
1
2021
medline:
12
1
2021
entrez:
11
1
2021
Statut:
epublish
Résumé
Experimentally resolving the microscopic energy dissipation and redistribution pathways in a molecular-scale junction, the smallest possible nanoelectronic device, is of great current interest. Here we report measurements of the vibrational pumping and light emission processes in current-carrying molecular junctions using surface enhanced Raman spectroscopy. We show that the heating of vibrational modes exhibits distinct features when the molecular junctions are driven by electrical bias or optical power. We further discuss the hot carrier origin of the broadband continuum emission observed in the Raman scattering spectrum.
Identifiants
pubmed: 33429369
doi: 10.1088/1361-648X/abda7b
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
© 2021 IOP Publishing Ltd.