Enhanced Light-Matter Interactions in Self-Assembled Plasmonic Nanoparticles on 2D Semiconductors

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Title
Enhanced Light-Matter Interactions in Self-Assembled Plasmonic Nanoparticles on 2D Semiconductors
Author(s)
Dinh Hoa Luong; Hyun Seok Lee; Ganesh Ghimire; Jubok Lee; Hyun Kim; Seok Joon Yun; Gwang Hwi An; Young Hee Lee
Publication Date
2018-11
Journal
SMALL, v.14, no.47, pp.1802949 -
Publisher
WILEY-V C H VERLAG GMBH
Abstract
Two-dimensional (2D) transition-metal dichalcogenide (TMD) monolayers of versatile material library are spotlighted for numerous unexplored research fields. While monolayer TMDs exhibit an efficient excitonic emission, the weak light absorption arising from their low dimensionality limits potential applications. To enhance the light-matter interactions of TMDs, while various plasmonic hybridization methods have been intensively studied, controlling plasmonic nanostructures via self-assembly processes remains challenging. Herein, strong light-matter interactions are reported in plasmonic Ag nanoparticles (NPs) hybridized on TMDs via an aging-based self-assembly process at room temperature. This hybridization is implemented by transferring MoS2 monolayers grown via chemical vapor deposition onto thin-spacer-covered Ag films. After a few weeks of aging in a vacuum desiccator, the Ag atoms in the heterolayered film diffuse to the MoS2 layers through a SiO2 spacer and self-cluster onto MoS2 point defects, resulting in the formation of Ag-NPs with an estimated diameter of approximate to 50 nm. The photoluminescence intensities for the Ag-NP/MoS2 hybrids are enhanced up to 35-fold compared with bare MoS2 owing to the local field enhancement near the plasmonic Ag-NPs. The localized surface plasmon resonances modes of this hybrid are systematically investigated via numerical simulations and dark-field scattering microscopy © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
URI
https://pr.ibs.re.kr/handle/8788114/5410
ISSN
1613-6810
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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