Understanding the Different Exciton–Plasmon
Coupling Regimes in Two-Dimensional Semiconductors Coupled with Plasmonic
Lattices: A Combined Experimental and Unified Equation of Motion Approach
Wenjing Liu
Yuhui Wang
Carl H. Naylor
Bumsu Lee
Biyuan Zheng
Gerui Liu
A. T. Charlie Johnson
Anlian Pan
Ritesh Agarwal
10.1021/acsphotonics.7b00672.s001
https://acs.figshare.com/articles/journal_contribution/Understanding_the_Different_Exciton_Plasmon_Coupling_Regimes_in_Two-Dimensional_Semiconductors_Coupled_with_Plasmonic_Lattices_A_Combined_Experimental_and_Unified_Equation_of_Motion_Approach/5484742
We
study exciton–plasmon coupling in two-dimensional semiconductors
coupled with Ag plasmonic lattices via angle-resolved reflectance
spectroscopy and by solving the equations of motion (EOM) in a coupled
oscillator model accounting for all the resonances of the system.
Five resonances are considered in the EOM model: semiconductor A and
B excitons, localized surface plasmon resonances (LSPRs) of plasmonic
nanostructures, and the lattice diffraction modes of the plasmonic
array. We investigated the exciton–plasmon coupling in different
2D semiconductors and plasmonic lattice geometries, including monolayer
MoS<sub>2</sub> and WS<sub>2</sub> coupled with Ag nanodisk and bowtie
arrays and examined the dispersion and line shape evolution in the
coupled systems via the EOM model with different exciton–plasmon
coupling parameters. The EOM approach provides a unified description
of the exciton–plasmon interaction in the weak, intermediate,
and strong coupling cases with correctly explaining the dispersion
and lineshapes of the complex system. This study provides a much deeper
understanding of light–matter interactions in multilevel systems
in general and will be useful to instruct the design of novel two-dimensional
exciton–plasmonic devices for a variety of optoelectronic applications
with precisely tailored responses.
2017-09-26 00:00:00
WS
2 D semiconductors
plasmonic lattice geometries
surface plasmon resonances
monolayer MoS 2
angle-resolved reflectance spectroscopy
LSPR
oscillator model accounting
Ag plasmonic lattices
lattice diffraction modes
exciton
line shape evolution
EOM model