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.

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

Author

Martin Wersäll

Chalmers, Physics, Bionanophotonics

Jorge Cuadra

Chalmers, Physics, Bionanophotonics

Tomasz Antosiewicz

Chalmers, Physics, Bionanophotonics

S. Balci

Timur Shegai

Chalmers, Physics, Bionanophotonics

Nano Letters

1530-6984 (ISSN) 1530-6992 (eISSN)

Vol. 17 1 551-558

Subject Categories

Physical Sciences

Roots

Basic sciences

DOI

10.1021/acs.nanolett.6b04659

PubMed

28005384

More information

Latest update

4/18/2018