Observation of Mode Splitting in Photoluminescence of Individual Plasmonic Nanoparticles Strongly Coupled to Molecular Excitons
Artikel i vetenskaplig tidskrift, 2017
Plasmon-exciton interactions are important for many prominent spectroscopic applications' such as surface enhanced Raman scattering, plasmon-mediated fluorescence, nanoscale lasing, and strong coupling. The case of strong coupling is analogous to quantum:optical effects. studied in solid state and atomic systems previously. plasmonics, Similar observations have been almost exclusively made in elastic scattering experiments; however, the interpretation of these experiments is often cumbersome. Here, we demonstrate mode splitting not only in scattering, but also in photoluminescence of individual hybrid nanosystems, which manifests a direct proof of strong coupling in plasmon-exciton nanoparticles, We achieved these results due to saturation of the mode volume with molecular J-aggregates, which resulted in splitting up to 400 meV, that is, similar to 20% of the resonance energy. We analyzed the correlation between scattering and photoluminescence and found that splitting in photoluminescence is considerably less than that in scattering. Moreover, we found that splitting in both photoluminescence and scattering signals increased upon cooling to cryogenic temperatures. These findings improve our understanding of strong Coupling phenomena in plasmonics.
Physics
polariton emission
single quantum-dot
Science & Technology - Other Topics
nanocavities
nanoshell
dynamics
Rabi splitting
ates of america
Materials Science
Chemistry
room-temperature
photoluminescence
p12288
dye
v112
plexciton
surface lattice resonances
Strong coupling
semiconductor microcavities
nanostructures
plasmon-exciton interactions
Författare
Martin Wersäll
Chalmers, Fysik, Bionanofotonik
Jorge Cuadra
Chalmers, Fysik, Bionanofotonik
Tomasz Antosiewicz
Chalmers, Fysik, Bionanofotonik
S. Balci
Timur Shegai
Chalmers, Fysik, Bionanofotonik
Nano Letters
1530-6984 (ISSN) 1530-6992 (eISSN)
Vol. 17 1 551-558Ämneskategorier
Fysik
Fundament
Grundläggande vetenskaper
DOI
10.1021/acs.nanolett.6b04659
PubMed
28005384