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Polarization-Dependent Light Emission and Charge Creation in MoS2 Monolayers on Plasmonic Au Nanogratings

Title
Polarization-Dependent Light Emission and Charge Creation in MoS2 Monolayers on Plasmonic Au Nanogratings
Authors
Kwon, SoyeongLee, Seong-YeonChoi, Soo HoKang, Jang-WonLee, Tae. Jin.Song, JungeunLee, Sang WookCho, Chang-HeeKim, Ki KangYee, Ki-JuKim, Dong-Wook
DGIST Authors
Cho, Chang-Hee
Issue Date
2020-09
Citation
ACS Applied Materials and Interfaces, 12(39), 44088-44093
Type
Article
Article Type
Article
Author Keywords
MoS2nanogratingsurface plasmon polaritonexcitonsurface photovoltage
Keywords
GRAPHENE
ISSN
1944-8244
Abstract
We fabricated plasmonic hybrid nanostructures consisting of MoS2 monolayer flakes and Au nanogratings with a period of 500 nm. The angle-resolved reflectance and photoluminescence spectra of the hybrid nanostructures clearly indicated a coupling between surface plasmon polaritons (SPPs) and incoming photons. The surface photovoltage (SPV) maps could visualize the spatial distribution of net charges while shining light on the sample. Considerable polarization and wavelength dependence of the SPV signals suggested that the SPP mode enhanced the light-matter interaction and resulting exciton generation in the MoS2 monolayer. From the photoluminescence spectra and the morphology of the suspended MoS2 region, it could be noted that light irradiation did not much raise the temperature of the MoS2 monolayers on the nanogratings. Nanoscopic SPV and surface topography measurements could reveal the local optoelectronic and mechanical properties of MoS2 monolayers. This work provided us insights into the proposal of a high-performance MoS2/metal optoelectronic devices, based on the understanding of the SPP-photon and SPP-exciton coupling.
URI
http://hdl.handle.net/20.500.11750/12626
DOI
10.1021/acsami.0c13436
Publisher
American Chemical Society
Related Researcher
  • Author Cho, Chang-Hee Future Semiconductor Nanophotonics Laboratory
  • Research Interests Semiconductor; Nanophotonics; Light-Matter Interaction
Files:
There are no files associated with this item.
Collection:
Department of Emerging Materials ScienceFuture Semiconductor Nanophotonics Laboratory1. Journal Articles


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