Hybrid coupling enhances photoluminescence of monolayer MoS2 on plasmonic nanostructures
Hybrid coupling enhances photoluminescence of monolayer MoS2 on plasmonic nanostructures
复制标题
混合耦合增强等离子体纳米结构上单层 MoS2 的光致发光
DOI：
10.1364/ol.43.004128
复制
发表时间：
2018-09-01
期刊：
影响因子：
3.6
通讯作者：
Wang, Mu
中科院分区：
文献类型：
--
作者：
Shi, Wen-Bo;Zhang, Lei;Wang, Mu
过渡金属二硫族化合物（TMDCs）的光致发光（PL）效率对其在光电器件中的实际应用具有重要影响。在这项工作中，我们研究了激子、表面等离子体激元和光学模式之间的多重耦合，以及它们对等离子体纳米孔阵列上单层MoS2的PL的影响。在可见光照射下，观察到单层二硫化钼对PL的强强度增强。我们进一步证明了二硫化钼诱导的激子，纳米孔激发的局部和传播表面等离子体，以及与入射激光相关的光学模式的存在。这些模式的混合耦合显著改善了光致发光信号，同时也减轻了单层二硫化钼的光致发光图像。这项工作为改善单层TMDCs的发射提供了一种独特的方法。与等离子体超材料耦合的原子级薄TMDCs也有望用于超薄集成发光二极管、光探测和纳米激光器等先进应用。(C) 2018年美国光学学会
The efficiency of photoluminescence (PL) of transition-metal dichalcogenides (TMDCs) significantly influences their practical applications in optoelectronic devices. In this work, we study multiple coupling among excitons, surface plasmons, and optical modes, and their effects on PL of monolayer MoS2 atop plasmonic nanohole arrays. Under the illumination of visible light, strong intensity enhancement of PL from monolayer MoS2 is observed in the system. We further demonstrate that there exist excitons induced from MoS2, localized and propagating surface plasmons excited from nanoholes, and optical modes related to the incident laser. And hybrid coupling of those modes significantly improves the PL signals and also lightens the PL images of monolayer MoS2. This work provides a unique way to improve the emission of monolayer TMDCs. The atomically thin TMDCs coupled to plasmonic metamaterials are also promising for advanced applications such as ultrathin integrated light-emission diodes, photodetection, and nanolasers. (C) 2018 Optical Society of America