A systematic investigation of the performance of CaF2‐Ag‐BaTiO3 heterostructure based SPR sensor has been performed. The article focuses on the point that a suitable dielectric layer and precise optimization process can lead to high performance. E‐coli bacterial is considered as analyte medium. The sensor design is optimized by simultaneous varying the thickness of Ag (dM) and BaTiO3 (dA) at wavelength (λ) = 1000 nm which provided an optimized figure of merit (FOM) of 4510 RIU−1 at dM = 48.1 and dA = 3.2 nm. Further, FOM is again enhanced by simultaneous optimization of wavelength and thickness of BaTiO3 which provided an FOM of 9108 RIU−1 at λ = 992 and dA = 3.3 nm at fixed dM = 48.1 nm. This is designated as final optimum radiation damping (ORD) condition for the proposed sensor design. The power loss curve and normalized electric field are plotted at ORD condition leads to the FWHM of 0.0200° and sensitivity of 182.17 deg. RIU−1 with power loss ratio of 2.59 and field enhancement factor of 1.06. The combined performance factor (CPF) at optimized parameters is 24276.79 µm4/RIU which enables the realization of sensor more practically.

中文翻译：

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利用基于高性能 Ag-BaTiO3 异质结构的等离子体传感器检测大肠杆菌


对基于 CaF2-Ag-BaTiO3 异质结构的 SPR 传感器的性能进行了系统研究。本文重点介绍了合适的介电层和精确的优化过程可以带来高性能。大肠杆菌被认为是分析物培养基。通过同时改变波长 （λ） = 1000 nm 处的 Ag （dM） 和 BaTiO3 （dA） 的厚度来优化传感器设计，在 dM = 48.1 和 dA = 3.2 nm 处提供 4510 RIU−1 的优化品质因数 （FOM）。此外，通过同时优化 BaTiO3 的波长和厚度，FOM 再次得到增强，在 λ = 992 处提供 9108 RIU−1，在固定 dM = 48.1 nm 处提供 dA = 3.3 nm。这被指定为所提议的传感器设计的最终最佳辐射阻尼 （ORD） 条件。在 ORD 条件下绘制了功率损耗曲线和归一化电场，得出 FWHM 为 0.0200°，灵敏度为 182.17 度 RIU−1，功率损耗比为 2.59，场增强因子为 1.06。优化参数下的综合性能因数 （CPF） 为 24276.79 μm4/RIU，这使得传感器的实现更加实用。