Interaction-driven transport of dark excitons in 2D semiconductors with phonon-mediated optical readout.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
22 Jun 2023
22 Jun 2023
Historique:
received:
28
11
2022
accepted:
08
06
2023
medline:
26
6
2023
pubmed:
23
6
2023
entrez:
22
6
2023
Statut:
epublish
Résumé
The growing field of quantum information technology requires propagation of information over long distances with efficient readout mechanisms. Excitonic quantum fluids have emerged as a powerful platform for this task due to their straightforward electro-optical conversion. In two-dimensional transition metal dichalcogenides, the coupling between spin and valley provides exciting opportunities for harnessing, manipulating, and storing bits of information. However, the large inhomogeneity of single layers cannot be overcome by the properties of bright excitons, hindering spin-valley transport. Nonetheless, the rich band structure supports dark excitonic states with strong binding energy and longer lifetime, ideally suited for long-range transport. Here we show that dark excitons can diffuse over several micrometers and prove that this repulsion-driven propagation is robust across non-uniform samples. The long-range propagation of dark states with an optical readout mediated by chiral phonons provides a new concept of excitonic devices for applications in both classical and quantum information technology.
Identifiants
pubmed: 37349290
doi: 10.1038/s41467-023-39339-y
pii: 10.1038/s41467-023-39339-y
pmc: PMC10287636
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
3712Subventions
Organisme : CUNY | Research Foundation of The City University of New York (Research Foundation of CUNY)
ID : 64510-00 52
Organisme : National Science Foundation (NSF)
ID : DMR-2044281
Informations de copyright
© 2023. The Author(s).
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