File(s) under permanent embargo
Strong coupling of carbon quantum dots in plasmonic nanocavities
journal contribution
posted on 2020-04-29, 00:00 authored by J M Katzen, C Tserkezis, Qiran CaiQiran Cai, Luhua LiLuhua Li, J M Kim, G Lee, G R Yi, W R Hendren, E J G Santos, R M Bowman, F HuangCopyright © 2020 American Chemical Society. Confining light in extremely small cavities is crucial in nanophotonics, central to many applications. Employing a unique nanoparticle-on-mirror plasmonic structure and using a graphene film as a spacer, we create nanoscale cavities with volumes of only a few tens of cubic nanometers. The ultracompact cavity produces extremely strong optical near-fields, which facilitate the formation of single carbon quantum dots in the cavity and simultaneously empower the strong coupling between the excitons of the formed carbon quantum dot and the localized surface plasmons. This is manifested in the optical scattering spectra, showing a magnificent Rabi splitting of up to 200 meV under ambient conditions. In addition, we demonstrate that the strong coupling is tuneable with light irradiation. This opens new paradigms for investigating the fundamental light emission properties of carbon quantum dots in the quantum regime and paves the way for many significant applications.
History
Journal
ACS Applied Materials and InterfacesVolume
12Issue
17Pagination
19866 - 19873Publisher
American Chemical SocietyLocation
Washington, D.C.Publisher DOI
ISSN
1944-8244eISSN
1944-8252Language
engPublication classification
C1 Refereed article in a scholarly journalUsage metrics
Categories
No categories selectedKeywords
Strong couplingPlexcitonNanopolaritonCarbon quantum dotsGraphene quantum dotsCarbon nanodotsScience & TechnologyTechnologyNanoscience & NanotechnologyMaterials Science, MultidisciplinaryScience & Technology - Other TopicsMaterials ScienceENHANCED RAMAN-SCATTERINGGRAPHENENANODOTSPHOTOLUMINESCENCETEMPERATURE
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC