Tailoring light–matter interactions in monolayer MoS₂ is critical for its use in optoelectronic and nanophotonic devices. While significant effort has been devoted to enhancing the photoluminescence intensity in monolayer MoS₂, tailoring of the emission spectrum including complex excitonic states remains largely unexplored. Here, we demonstrate that the peak emission wavelengths of the A and B excitons can be tuned up to 40 and 25 nm, respectively, by integrating monolayer MoS₂ into a plasmonic nanocavity with tunable plasmon resonances. Contrary to the intrinsic photoluminescence spectrum of monolayer MoS₂, we are also able to create a dominant B exciton peak when the nanocavity is resonant with its emission. Additionally, we observe a 1200-fold enhancement of the A exciton emission and a 6100-fold enhancement of the B exciton emission when normalized to the area under a single nanocavity and compared to a control sample on thermal oxide.

中文翻译：

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使用等离子纳米腔的二维半导体量身定制的发射光谱

调整单层MoS _2中的光-物质相互作用对于将其用于光电和纳米光子设备至关重要。虽然已经致力于增加单层MoS _2中的光致发光强度的大量努力，但包括复杂的激子态在内的发射光谱的定制仍大有待探索。在这里，我们证明了通过将单层MoS ₂集成到具有可调等离子体激元共振的等离子体纳米腔中，A和B激子的峰值发射波长可以分别调节至40和25 nm 。与单层MoS ₂的本征光致发光光谱相反，当纳米腔与其发射共振时，我们还能够创建一个主导的B激子峰。此外，当归一化到单个纳米腔下的面积并与热氧化物上的对照样品进行比较时，我们观察到A激子发射增强了1200倍，B激子发射增强了6100倍。