Abstract
In this paper, a highly sensitive surface plasmon resonance biosensor is presented using angular interrogation. Due to low sensitivity of conventional biosensor, graphene/two-dimensional transition metal are used in surface plasmon resonance biosensor to improve the sensitivity. Here, we propose a seven layer model of biosensor which shows by incorporating silicon layer in addition of transition metal dichalcogenides MoS2 and graphene, the sensitivity of the proposed SPR biosensor can be greatly enhanced than the conventional gold film SPR sensors. It is observed that the highest sensitivity can be obtained by optimizing the structure with 8 nm thickness of silicon layer, one layer of MoS2 and one layer of graphene. The highest sensitivity of our proposed sensor is 210°/RIU.
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Shushama, K.N., Rana, M.M., Inum, R. et al. Sensitivity enhancement of graphene coated surface plasmon resonance biosensor. Opt Quant Electron 49, 381 (2017). https://doi.org/10.1007/s11082-017-1216-z
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DOI: https://doi.org/10.1007/s11082-017-1216-z