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나노 구조 물리 연구단
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Selective Amplification of the Primary Exciton in a MoS2 Monolayer

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Title
Selective Amplification of the Primary Exciton in a MoS2 Monolayer
Author(s)
Hyun Seok Lee; Min Su Kim; Youngjo Jin; Gang Hee Han; Young Hee Lee; Jeongyong Kim
Publication Date
2015-11
Journal
PHYSICAL REVIEW LETTERS, v.115, no.22, pp.226801 -
Publisher
AMER PHYSICAL SOC
Abstract
Optoelectronics applications for transition-metal dichalcogenides are still limited by weak light absorption and their complex exciton modes are easily perturbed by varying excitation conditions because they are inherent in atomically thin layers. Here, we propose a method of selectively amplifying the primary exciton (A(0)) among the exciton complexes in monolayer MoS2 via cyclic reexcitation of cavity-free exciton-coupled plasmon propagation. This was implemented by partially overlapping a Ag nanowire on a MoS2 monolayer separated by a thin SiO2 spacer. Exciton-coupled plasmons in the nanowire enhance the A(0) radiation in MoS2. The cumulative amplification of emission enhancement by cyclic plasmon traveling reaches approximately twentyfold selectively for the A(0), while excluding other B exciton and multiexciton by significantly reduced band filling, without oscillatory spectra implying plasmonic cavity effects. © 2015 American Physical Society
URI
http://pr.ibs.re.kr/handle/8788114/2562
DOI
10.1103/PhysRevLett.115.226801
ISSN
0031-9007
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
Files in This Item:
Selective Amplification(2015)PhysRevLett 115 226801(2015)_이현석박사.pdfDownload

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