Fig. 1. The MoS₂-cavity coupled system’s (a) structural diagram, (b) scanning electron microscope image, and (c) optical image. MoS₂与谐振腔耦合系统(样品)的(a)结构示意图, (b)扫描电子显微镜(SEM)图像和(c)光学图像

Fig. 2. (a) The con-focal microscope setup of measuring PL enhancement of monolayer MoS₂; (b) the sample's far-field PL intensity image of EMCCD. (a)研究单层MoS₂ PL增强效应的共焦显微系统装置图; (b) EMCCD得到的样品远场PL强度扫描图

Fig. 3. The APD scanning images of MoS₂ PL enhancement when the angles between the excitation light and resonator’s long-axis are (a) Φ = 0° and (b) Φ = 90°. MoS₂辐射光偏振与谐振腔长轴方向在不同夹角　(a) Φ = 0° 和(b) Φ = 90°下得到的PL增强扫描图

Fig. 4. The photon counts of APD at different angle combinations of the excitation and detection lights: (a) Φ_ex(co) = 0°; (b) Φ_ex(co) = 90°. 不同激发光(探测光)偏振角度下, 探测光(激发光)的光子数变化规律曲线　(a) Φ_ex(co) = 0°; (b) Φ_ex(co) = 90°

Fig. 5. (a) The PL spectra of monolayer MoS₂ in different cases; (b) the transmission spectrum of the plasmonic resonator; (c) the PL enhancement of the MoS2-cavity coupled system. (a)单层MoS₂在不同情形下的PL谱线; (b)等离子体谐振腔的传输谱; (c)实验中得到的最大PL增强倍数曲线