نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی برق، واحد سنندج، دانشگاه آزاد اسلامی، سنندج، ایران
2 دانشگاه شهید بهشتی
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
The inherent limitations of prism-based surface plasmon resonance (SPR) biosensors, primarily due to their bulky design and dependence on mechanical components, have constrained their deployment in field and operational applications. In light of these challenges, there has been a significant advancement in the development of fiber optic-based SPR biosensors. This paper presents the design of a highly sensitive SPR biosensor utilizing a dual-core photonic crystal fiber (PCF). In this configuration, a gold layer serves as the plasmonic material, enabling the investigation of refractive index variations in the medium surrounding the PCF structure. Surface plasmons are excited through the coupling of the leakage mode of the PCF with the plasmonic mode. Additionally, a thin layer of titanium dioxide (TiO₂) is applied over the gold to prevent oxidation. According to simulations conducted using the Finite element method (FEM) method, the biosensor demonstrates the sensitivity of 7000 nm/RIU in terms of wavelength sensitivity and 380 RIU⁻¹ in terms of amplitude sensitivity, confirming the designed device's applicability in drug detection, biological sensing, and other analytical scenarios.
کلیدواژهها [English]
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