Deep-strong tunable plasmon-exciton coupling utilizing Ag-Si core-shell combined with WS2 monolayer for quantum optics applications
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F25%3A00385850" target="_blank" >RIV/68407700:21230/25:00385850 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1063/5.0277425" target="_blank" >https://doi.org/10.1063/5.0277425</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/5.0277425" target="_blank" >10.1063/5.0277425</a>
Alternative languages
Result language
angličtina
Original language name
Deep-strong tunable plasmon-exciton coupling utilizing Ag-Si core-shell combined with WS2 monolayer for quantum optics applications
Original language description
In close proximity to quantum emitters (QEs), plasmonic nanoparticles (NPs) facilitate energy exchange with the QEs, which is known as plasmon-exciton coupling. The strong coupling regime, associated with Rabi splitting, is crucial for advanced nanophotonic devices, including solar cells, single-photon nonlinear optics, and nanolasers. Recently, high refractive index semiconductor NPs (typically Si NPs) have emerged for designing strongly coupled systems. However, their large mode volumes of magnetic Mie resonances have limited their success in achieving strong coupling. This study investigates the plasmon-exciton coupling between an Ag-Si core-shell and a monolayer QE of WS2 (Ag-Si-WS2 system) in air and water environments. Here, we compare the coupling dynamics of the hybrid Ag-Si-WS2 system to that of the Si-WS2 system as a benchmarking system. Employing Mie's theory of core-shell scattering, in conjunction with Maxwell-Garnett effective medium theory, we analyze the optical responses of both configurations. Then, we calculate the Rabi splitting frequency for each system to identify the coupling regime. Our results suggest that the Ag-Si-WS2 system can achieve a deep-strong coupling regime when the Ag core radius is less than 30 nm, with enhanced coupling strength in water compared to air. Conversely, the Si-WS2 system does not achieve strong coupling in either medium. The hybrid modes in Ag-Si-WS2 demonstrate remarkable symmetrical spectral characteristics compared to the asymmetric spectral line shape observed in the Si-WS2 system. The findings suggest avenues for utilizing the plasmon-exciton strong coupling in the Ag-Si-WS2 system to enhance optoelectronic and quantum electronic devices.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Chemical Physics
ISSN
0021-9606
e-ISSN
1089-7690
Volume of the periodical
163
Issue of the periodical within the volume
9
Country of publishing house
US - UNITED STATES
Number of pages
13
Pages from-to
"094703-1"-"094703-13"
UT code for WoS article
001564593900001
EID of the result in the Scopus database
2-s2.0-105015116769