Journal
OPTICS COMMUNICATIONS
Volume 508, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.optcom.2021.127616
Keywords
Barium titanate; Sensitivity improvement; SPR sensor; Analyte
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This paper computationally proposes a unique surface plasmon resonance (SPR) biosensor that combines recently developed Perovskite and 2D materials. The performance of the proposed sensor is evaluated and optimized, showing high sensitivity, FOM, and QF. The biosensor has potential applications in medical diagnostics and biological detection.
A unique surface plasmon resonance (SPR) biosensors is proposed computationally in this paper, combining recently developed Perovskite (e.g., BaTiO3) with 2D materials (e.g., black phosphorus) atop of standard SPR biosensors. The performance of the proposed structure, such as sensitivity, the figure of merit (FOM), and the quality factor (QF) of the sensors, are evaluated using the attenuated total reflection (ATR) approach. The Ag/BaTiO3/BP, Au/BaTiO3/BP and Cu/BaTiO3/BP structures, respectively, have exceptionally high sensitivity of 360/RIU, 299/RIU, and 378/RIU, which are 1.5, 0.55, and 1.86 times greater than the conventional silver (Ag), gold (Au), copper (Cu) based sensors, with equivalent FOM and QF. For the bimetallic layer first metal Ag, Au, and Cu-based sensors, the thickness of Ag/Au/Cu is 50/40/35 nm, and the thickness of the second metal layer is 10 nm, and the number of BP layers is 0.34 for Ag/Au/Cu-based sensors. BaTiO3 is employed in all cases with an optimum thickness of 5 nm. The proposed biosensors' remarkable performance will pave the road for their implementation in future medical diagnostics and biological detection applications.
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