Strong light-matter interactions between gap plasmons and two-dimensional excitons at ambient condition in a deterministic way
Abstract
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 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.
Keywords
Cite
@article{arxiv.2203.01501,
title = {Strong light-matter interactions between gap plasmons and two-dimensional excitons at ambient condition in a deterministic way},
author = {Longlong Yang and Xin Xie and Jingnan Yang and Mengfei Xue and Shiyao Wu and Shan Xiao and Feilong Song and Jianchen Dang and Sibai Sun and Zhanchun Zuo and Jianing Chen and Yuan Huang and Xingjiang Zhou and Kuijuan Jin and Can Wang and Xiulai Xu},
journal= {arXiv preprint arXiv:2203.01501},
year = {2023}
}
Comments
21 pages, 5 figures