標題: Plasmonic Gold Nanorods Coverage Influence on Enhancement of the Photoluminescence of Two-Dimensional MoS2 Monolayer
作者: Lee, Kevin C. J.
Chen, Yi-Huan
Lin, Hsiang-Yu
Cheng, Chia-Chin
Chen, Pei-Ying
Wu, Ting-Yi
Shih, Min-Hsiung
Wei, Kung-Hwa
Li, Lain-Jong
Chang, Chien-Wen
材料科學與工程學系
光電工程學系
Department of Materials Science and Engineering
Department of Photonics
公開日期: 17-Nov-2015
摘要: The 2-D transition metal dichalcogenide (TMD) semiconductors, has received great attention due to its excellent optical and electronic properties and potential applications in field-effect transistors, light emitting and sensing devices. Recently surface plasmon enhanced photoluminescence (PL) of the weak 2-D TMD atomic layers was developed to realize the potential optoelectronic devices. However, we noticed that the enhancement would not increase monotonically with increasing of metal plasmonic objects and the emission drop after the certain coverage. This study presents the optimized PL enhancement of a monolayer MoS2 in the presence of gold (Au) nanorods. A localized surface plasmon wave of Au nanorods that generated around the monolayer MoS2 can provide resonance wavelength overlapping with that of the MoS2 gain spectrum. These spatial and spectral overlapping between the localized surface plasmon polariton waves and that from MoS2 emission drastically enhanced the light emission from the MoS2 monolayer. We gave a simple model and physical interpretations to explain the phenomena. The plasmonic Au nanostructures approach provides a valuable avenue to enhancing the emitting efficiency of the 2-D nano-materials and their devices for the future optoelectronic devices and systems.
URI: http://dx.doi.org/10.1038/srep16374
http://hdl.handle.net/11536/129379
ISSN: 2045-2322
DOI: 10.1038/srep16374
期刊: SCIENTIFIC REPORTS
Volume: 5
起始頁: 0
結束頁: 0
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