Sensitivity analysis of a graphene based surface plasmon resonance biosensor in terms of number of graphene layers

2016 ◽  
Author(s):  
Md. Mushfequl Bari ◽  
Ajay Krishna Sarkar ◽  
Sakhawat Hossain
Keyword(s):  
Sensitivity Analysis ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Graphene Layers ◽  
Surface Plasmon Resonance Biosensor

scholarly journals Ultrasensitive Surface Plasmon Resonance Biosensor Using Blue Phosphorus–Graphene Architecture

Sensors ◽  
2020 ◽  
Vol 20 (11) ◽  
pp. 3326
Author(s):  
Keyi Li ◽  
Lintong Li ◽  
Nanlin Xu ◽  
Xiao Peng ◽  
Yingxin Zhou ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Gold Film ◽  
Detection Sensitivity ◽  
Graphene Layers ◽  
Surface Plasmon Resonance Biosensor ◽  
Magnitude Sensitivity ◽  
Index Unit

This study theoretically proposed a novel surface plasmon resonance biosensor by incorporating emerging two dimensional material blue phosphorus and graphene layers with plasmonic gold film. The excellent performances employed for biosensing can be realized by accurately tuning the thickness of gold film and the number of blue phosphorus interlayer. Our proposed plasmonic biosensor architecture designed by phase modulation is much superior to angular modulation, providing 4 orders of magnitude sensitivity enhancement. In addition, the optimized stacked configuration is 42 nm Au film/2-layer blue phosphorus /4-layer graphene, which can produce the sharpest differential phase of 176.7661 degrees and darkest minimum reflectivity as low as 5.3787 × 10−6. For a tiny variation in local refractive index of 0.0012 RIU (RIU, refractive index unit) due to the binding interactions of aromatic biomolecules, our proposed biosensor can provide an ultrahigh detection sensitivity up to 1.4731 × 105 °/RIU, highly promising for performing ultrasensitive biosensing application.

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