Han Lei, Hu Zhimin, Pan Jianxing, Huang Tianye, Luo Dapeng
School of Mechanical Engineering and Electronic Information, China University of Geosciences (Wuhan), Wuhan 430074, China.
Sensors (Basel). 2020 Jun 26;20(12):3605. doi: 10.3390/s20123605.
Surface plasmon resonance (SPR) with two-dimensional (2D) materials is proposed to enhance the sensitivity of sensors. A novel Goos-Hänchen (GH) shift sensing scheme based on blue phosphorene (BlueP)/transition metal dichalogenides (TMDCs) and graphene structure is proposed. The significantly enhanced GH shift is obtained by optimizing the layers of BlueP/TMDCs and graphene. The maximum GH shift of the hybrid structure of Ag-Indium tin oxide (ITO)-BlueP/WS-graphene is -2361λ with BlueP/WS four layers and a graphene monolayer. Furthermore, the GH shift can be positive or negative depending on the layer number of BlueP/TMDCs and graphene. For sensing performance, the highest sensitivity of 2.767 × 10λ/RIU is realized, which is 5152.7 times higher than the traditional Ag-SPR structure, 2470.5 times of Ag-ITO, 2159.2 times of Ag-ITO-BlueP/WS, and 688.9 times of Ag-ITO-graphene. Therefore, such configuration with GH shift can be used in various chemical, biomedical and optical sensing fields.
有人提出利用二维（2D）材料的表面等离子体共振（SPR）来提高传感器的灵敏度。本文提出了一种基于蓝磷（BlueP）/过渡金属二卤化物（TMDCs）和石墨烯结构的新型古斯-汉欣（GH）位移传感方案。通过优化BlueP/TMDCs和石墨烯的层数，可以显著增强GH位移。对于Ag-氧化铟锡（ITO）-BlueP/WS-石墨烯的混合结构，当BlueP/WS为四层且石墨烯为单层时，最大GH位移为-2361λ。此外，根据BlueP/TMDCs和石墨烯的层数，GH位移可以为正或负。在传感性能方面，实现了高达2.767×10λ/RIU的最高灵敏度，这比传统的Ag-SPR结构高5152.7倍，是Ag-ITO的2470.5倍，Ag-ITO-BlueP/WS的2159.2倍，以及Ag-ITO-石墨烯的688.9倍。因此，这种具有GH位移的结构可用于各种化学、生物医学和光学传感领域。
