Sensitivity enhancement of surface plasmon resonance biosensor with graphene sandwiched between two metal films

Lili Liu; Wei Du; Di Wu; Kunpeng Jiao; Lipeng Jiao; Mei Wang; Feng Xia; Weijin Kong; Maojin Yun

doi:10.1117/12.2320025

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19 September 2018 Sensitivity enhancement of surface plasmon resonance biosensor with graphene sandwiched between two metal films

Lili Liu, Wei Du, Di Wu, Kunpeng Jiao, Lipeng Jiao, Mei Wang, Feng Xia, Weijin Kong, Maojin Yun

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Proceedings Volume 10722, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVI; 1072224 (2018) https://doi.org/10.1117/12.2320025
Event: SPIE Nanoscience + Engineering, 2018, San Diego, California, United States

Abstract

A new optical sensor based on the surface plasmon resonance (SPR) is proposed and characterized. The sensor is composed by sandwiching the graphene sheets between two metal films in the Kretschmann configuration. The resonance angle and the sensitivity of proposed sensor are analyzed through the transfer matrix method. Moreover, the refractive index change of the analyte can be detected accurately by using the proposed sensor. It is observed that the sensitivity of the proposed bimetallic sensor configuration can be greatly enhanced than conventional single metal configuration by optimizing the thickness of the metals and the number of graphene layers. Finally, we believe that the proposed SPR configuration can further promote the biosensing application.

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Lili Liu, Wei Du, Di Wu, Kunpeng Jiao, Lipeng Jiao, Mei Wang, Feng Xia, Weijin Kong, and Maojin Yun "Sensitivity enhancement of surface plasmon resonance biosensor with graphene sandwiched between two metal films", Proc. SPIE 10722, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVI, 1072224 (19 September 2018); https://doi.org/10.1117/12.2320025

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