激子
等离子体子
单层
凝聚态物理
材料科学
联轴节(管道)
半导体
偶极子
比克西顿
光电子学
作者
Longlong Yang,Xin Xie,Jingnan Yang,Mengfei Xue,Shiyao Wu,Shan Xiao,Feilong Song,Jianchen Dang,Sibai Sun,Zhanchun Zuo,Jianing Chen,Yuan Huang,Xingjiang Zhou,Kuijuan Jin,Can Wang,Xiulai Xu
出处
期刊:Nano Letters
[American Chemical Society]
日期:2022-03-23
卷期号:22 (6): 2177-2186
标识
DOI:10.1021/acs.nanolett.1c03282
摘要
Strong exciton-plasmon interaction between the layered two-dimensional (2D) semiconductors and gap plasmons shows a great potential to implement cavity quantum-electrodynamics in ambient condition. However, achieving a robust plasmon-exciton coupling with nanocavity is still very challenging, because the layer area is usually small with conventional approaches. Here, we report on a robust strong exciton-plasmon coupling between the gap mode of bowtie and the excitons in MoS$_2$ layers with gold-assisted mechanical exfoliation and the nondestructive wet transfer techniques for large-area layer. Benefiting from the ultrasmall mode volume and strong in-plane field, the estimated effective exciton number contributing to the coupling is largely reduced. With a corrected exciton transition dipole moment, the exciton numbers are extracted with 40 for the case of monolayer and 48 for 8 layers. Our work paves a way to realize the strong coupling with 2D materials with few excitons at room temperature.
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