Observation of Mode Splitting in Photoluminescence of Individual Plasmonic Nanoparticles Strongly Coupled to Molecular Excitons
Journal article, 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.
semiconductor microcavities
Rabi splitting
nanostructures
Strong coupling
Physics
polariton emission
plasmon-exciton interactions
dye
room-temperature
surface lattice resonances
photoluminescence
Chemistry
plexciton
ates of america
v112
nanocavities
single quantum-dot
Materials Science
dynamics
p12288
nanoshell
Science & Technology - Other Topics
Author
Martin Wersäll
Chalmers, Physics, Bionanophotonics
Jorge Cuadra
Chalmers, Physics, Bionanophotonics
Tomasz Antosiewicz
Chalmers, Physics, Bionanophotonics
S. Balci
University of Turkish Aeronautical Association
Timur Shegai
Chalmers, Physics, Bionanophotonics
Nano Letters
1530-6984 (ISSN) 1530-6992 (eISSN)
Vol. 17 1 551-558Roots
Basic sciences
Subject Categories
Atom and Molecular Physics and Optics
Condensed Matter Physics
DOI
10.1021/acs.nanolett.6b04659
PubMed
28005384