【摘要】 二维过渡金属硫族化物（two-dimensional transition-metal dichalcogenides, 2D-TMDs）是一种直接带隙半导体，表现出显著的光学特性，成为各种光电探测器、光伏和发光二级管等光电器件的理想材料。然而，由于原子级厚度的限制，TMDs的本征光吸收率和发射率非常低，限制了光与物质之间的相互作用，严重阻碍了其在电子学和光子学中的应用。而等离子体纳米结构可以将光限制在纳米尺度，极大增强局域电场强度，从而显著增强光与物质之间的相互作用。因此在这里，构建了由单层WSe₂和银纳米线二聚体（nanowire dimer,NWD）组成的复合体系，研究了单层WSe₂激子与NWD等离子体的相互作用，相比于原始单层WSe₂,在NWD/WSe₂复合体系中荧光强度初步实现了1.2倍增强。理论模拟揭示这里荧光增强源于NWD的高辐射效率、 purcell效应和激发增强，理论分析很好的解释了实验结果，证明了该体系可以有效地增强单层WSe₂的荧光。更多还原

【Abstract】 Two-dimensional transition-metal dichalcogenides（TMDs） are direct-band-gap materials, which exhibit remarkable optical properties and become ideal materials for various photodetectors, photovoltaic and light-emitting diodes. However, due to the limitation of atomic level thickness, the weak intrinsic light absorption and emission of TMDs limits light-matter interactions and seriously hinders the applications in electronics and photonics. Plasmonic nanostructures can confine light into nanometer scale, greatly enhance the local electric field intensity, and further significantly enhance light-matter interactions. Here built a hybrid system comprised of monolayer WSe₂ and silver nanowire dimer（NWD）, and studied the interaction between monolayer WSe₂ exciton and NWD plasmon, the PL intensity of the NWD/WSe₂ hybrid system was initially enhanced by 1.2 times compared with bare WSe₂. The theoretical simulation revealed that the fluorescence enhancement here was originated from the NWD’S high radiation efficiency, Purcell effect and excitation enhancement. Theoretical analysis well explains the experimental results and proves that the system can efficiently enhance the fluorescence of transition metal chalcogenides.更多还原