单层
激子
等离子体子
色散(光学)
联轴节(管道)
材料科学
电场
凝聚态物理
分子物理学
纳米技术
物理
光电子学
光学
量子力学
冶金
作者
Jie Zhong,Jun-Yu Li,Jin Liu,Yifan Xiang,He Feng,Renming Liu,Wei Li,Xuehua Wang
出处
期刊:Nano Letters
[American Chemical Society]
日期:2024-01-29
卷期号:24 (5): 1579-1586
被引量:1
标识
DOI:10.1021/acs.nanolett.3c04158
摘要
Engineering room-temperature strong coupling of few-exciton in transition-metal dichalcogenides (TMDCs) with plasmons promises to construct compact and high-performance quantum optical devices. But it remains unimplemented due to their in-plane excitons. Here, we demonstrate the strong coupling of few-exciton within 10 in monolayer WS2 with the plasmonic mode with a large tangential component of the electric field tightly trapped around the sharp corners of an Au@Ag nanocuboid, the fewest number of excitons observed in the TMDC family so far. Furthermore, we for the first time report a significant deviation with a relative difference of up to 100.6% between the spectrum and eigenlevel splitting dispersions, which increases with decreasing coupling strength. It is also shown that the coupling strength obtained by the conventional concept of both being equal to the measured spectrum splitting is markedly overestimated. Our work enriches the understanding of strong light–matter interactions at room temperature.
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