Strong Coupling in Monolayer WS2 Integrated All-Dielectric Metasurfaces with Electric-Quadrupole Modes,Nano Letters

当前位置： X-MOL 学术 › Nano Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Strong Coupling in Monolayer WS2 Integrated All-Dielectric Metasurfaces with Electric-Quadrupole Modes
Nano Letters ( IF 9.1 ) Pub Date : 2025-06-23 , DOI: 10.1021/acs.nanolett.5c02217
Zijian He _{1,

2} , Xiaobo Han _{3,

4} , Liyu Zhang _{1,

2} , Jiaxing Yang _{1,

2} , Shuzheng Chen _{1,

2} , Siyi Xiao _{1,

2} , Shuai Ji _{1,

2} , Kai Wang _{1,

2,

5,

6} , Peixiang Lu _{1,

2,

3,

4}

Affiliation

All-dielectric metasurfaces have emerged as promising platforms for studying strong coupling due to their low absorptive losses and diverse resonance modes. However, previous works have primarily focused on all-dielectric metasurfaces with electric/magnetic dipole (ED/MD) modes, while higher-order multipoles, such as electric quadrupole (EQ), have not been fully explored. Here, we report on an EQ-involved strong coupling based on the monolayer WS₂ integrated all-dielectric metasurfaces. By precisely tuning the EQ modes to be spectrally overlapped with the A exciton resonance of WS₂ (at 614 nm), angle-resolved transmission spectra show a clear anticrossing behavior with a 31.7 meV Rabi splitting. EQ modes feature spatially varying field gradients and strong in-plane electric fields at the interface, thus increasing the coupling efficiency with two-dimensional materials. This work presents a novel strategy for developing low-loss, compact polaritonic devices, contributing to a deeper understanding of the strong coupling mechanisms between higher-order multipoles and excitons.

中文翻译：

具有电四极杆模式的单层 WS2 集成全介电超表面中的强耦合

全介电超表面由于其低吸收损耗和多种谐振模式而成为研究强耦合的有前途的平台。然而，以前的工作主要集中在具有电/磁偶极子（ED/MD）模式的全介电超表面上，而高阶多极子，如电四极子（EQ），尚未得到充分探索。在这里，我们报告了基于单层 WS₂ 集成全介电超表面的 EQ 涉及的强耦合。通过精确调整 EQ 模式，使其在光谱上与 WS₂ 的 A 激子共振（在 614 nm 处）重叠，角度分辨透射光谱显示出清晰的反交叉行为，具有 31.7 meV 的拉比分裂。EQ 模式具有空间变化的场梯度和界面处的强面内电场，从而提高了与二维材料的耦合效率。这项工作提出了一种开发低损耗、紧凑的极化子器件的新策略，有助于更深入地理解高阶多极子和激子之间的强耦合机制。

更新日期：2025-06-23

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南