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Comparative study on sensitivity enhancement of a graphene based nearly guided-wave surface plasmon resonance biosensor optimized using genetic algorithm in the visible region

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Abstract

In this paper, we investigate sensitivity enhancement of a graphene based nearly guided-wave surface plasmon resonance (NGWSPR) biosensor in the visible region. The proposed biosensor is optimized using genetic algorithms to obtain the highest sensitivity for a specific wavelength of incident light. The optimized sensitivity of the NGWSPR sensor is compared with a traditional surface plasmon resonance (SPR) biosensor at the wavelength of incident light varied from 400 to 800 nm. The percentage of sensitivity increment of a NGWSPR sensor relative to a traditional SPR sensor is also calculated. As high as 393.3, 542.5, 388.9 or 132.1% sensitivity increment percentage has been demonstrated for an Au, Ag, Cu or Al based NGWSPR sensor. Furthermore, the maximum sensitivity of a NGWSPR biosensor at different wavelength is also investigated and compared. For a NGWSPR sensor based on Au, Ag, Cu or Al, the maximum sensitivity is 225.12, 302.26, 222.04, or 163.78 °/RIU showing at 720, 480, 680 or 400 nm respectively.

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Funding

This study was supported by the National Natural Science Foundation of China (Grant Nos. 11547241 and 61805007) and the Fundamental Research Funds for the Central Universities, China (Grant No. 2652017340)

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Correspondence to Shujing Chen or Chengyou Lin.

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The authors have not disclosed any competing interests.

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Chen, S., Lin, Z., Bai, G. et al. Comparative study on sensitivity enhancement of a graphene based nearly guided-wave surface plasmon resonance biosensor optimized using genetic algorithm in the visible region. Opt Quant Electron 54, 199 (2022). https://doi.org/10.1007/s11082-022-03584-0

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  • DOI: https://doi.org/10.1007/s11082-022-03584-0

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