Strong Coupling between Moiré-Type Plasmons and Phonons in Suspended Monolayer Metallic Twisted Superlattices

• DOI: 10.1021/acs.nanolett.4c04841
• Publication Date: 2024-11-20T23:08:51Z
• Authors: Bin You; Yuhan Du; Shuangxiu Yuan; Yuan Tian; Xianghao Meng; Wenbin Wu; Zeping Shi; Guangyi Wang; Xin Chen; Xiang Yuan; Xiaolong Zhu
• Keywords: Moiré pattern

We demonstrate both experimentally and analytically a strong coupling phenomenon between moiré-type plasmons phonons within moiré superlattices. study the dependence of wave vector twist angle numerically simulate fabricate metallic superlattices on suspended thin film SiO2 substrate at different angles. The results suggest that strength initially increases then decreases with increasing When is 16.26°, we achieve plasmon-phonon Rabi splitting approaching 45 meV. further analyze system by utilizing coupled-harmonic-oscillators theory quantum mechanical theory. calculations numerical simulations agree experimental results. proposed has potential to contribute substantially electromagnetic field controlling coupling.