SignificanceThin transparent semiconductors of two-dimensional materials are attractive for the practical applications in next-generation nanoelectronic and optoelectronic devices. Probing the electron states and electrical switching mechanisms of a molybdenum disulphide monolayer with atomic-scale thickness (6.5 Å) allows us to unlock the full technological potential of this nanomaterial. We introduced a plasmonic phase imaging method to uncover the underlying mechanism and detailed switching dynamics of an electrical-state switching event. This dramatic phase change can be attributed to the reversible switching of classical electromagnetic coupling and quantum coupling effects interplaying between a single metal nanoparticle and molybdenum disulphide monolayer, and the transient intermediate states during the switching event can be directly imaged by a plasmonic technique.

中文翻译：

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二硫化钼单层电开关和量子耦合的中间态成像。

意义二维材料的薄透明半导体对于下一代纳米电子和光电器件的实际应用具有吸引力。探测原子级厚度 (6.5 Å) 的二硫化钼单层的电子态和电开关机制使我们能够释放这种纳米材料的全部技术潜力。我们引入了等离子体相位成像方法来揭示电状态切换事件的基本机制和详细的切换动力学。这种剧烈的相变可归因于单个金属纳米粒子和二硫化钼单层之间相互作用的经典电磁耦合和量子耦合效应的可逆切换，并且切换事件期间的瞬态中间态可以通过等离子体技术直接成像。