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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 S.Lee S.-Y.Choi S.H.Kang J.-W.Lee T.Song J.Lee S.W.Cho C.-H.Kim K.K.Yee K.-J.Kim D.-W.
Ewha Authors
김동욱이상욱
SCOPUS Author ID
김동욱scopus; 이상욱scopus
Issue Date
2020
Journal Title
ACS Applied Materials and Interfaces
ISSN
1944-8244JCR Link
Citation
ACS Applied Materials and Interfaces vol. 12, no. 39, pp. 44088 - 44093
Keywords
ExcitonMoS2NanogratingSurface photovoltageSurface plasmon polariton
Publisher
American Chemical Society
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
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. © 2020 American Chemical Society
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DOI
10.1021/acsami.0c13436
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자연과학대학 > 물리학전공 > Journal papers
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