Strong coupling of carbon quantum dots in plasmonic nanocavities
Version 2 2024-06-06, 03:27Version 2 2024-06-06, 03:27
Version 1 2020-04-21, 10:35Version 1 2020-04-21, 10:35
journal contribution
posted on 2024-06-06, 03:27 authored by JM Katzen, C Tserkezis, Q Cai, LH Li, JM Kim, G Lee, GR Yi, WR Hendren, EJG Santos, RM 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
12Pagination
19866-19873Location
Washington, D.C.ISSN
1944-8244eISSN
1944-8252Language
engPublication classification
C1 Refereed article in a scholarly journalIssue
17Publisher
American Chemical SocietyUsage metrics
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