Abstract
Surface plasmon resonance (SPR) biosensor is widely used for its high precision and real-time analysis. In this paper, SPR biosensor based on the hybrid structure of metal–indium tin oxide (ITO)–WS2 are proposed and investigated. By optimizing the thickness of metals (Au, Cu, Ag), ITO and WS2, the reflectivity of 2.932 × 10−7 a.u and highest phase sensitivity of 1.711 × 106 deg/RIU are obtained by using Ag–ITO–WS2-dielectric structure. Compared with the traditional metal-based SPR sensor, the performance of the proposed one is improved up to ~ 25.8 times. The results show that ITO and WS2 have an important effect on enhancing SPR sensing performance.
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Acknowledgments
This work was partially supported by the National Natural Science Foundation of China (61605179); the Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) (162301132703, G1323511665); the 863 High Technology Plan (2015AA015502); and the Fundamental Research Founds for National University, China University of Geosciences (Wuhan) (1810491T06).
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Han, L., Zhao, X., Huang, T. et al. Comprehensive Study of Phase-Sensitive SPR Sensor Based on Metal–ITO Hybrid Multilayer. Plasmonics 14, 1743–1750 (2019). https://doi.org/10.1007/s11468-019-00968-z
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DOI: https://doi.org/10.1007/s11468-019-00968-z