材料科学
光子晶体光纤
表面等离子共振
折射率
灵敏度(控制系统)
分析物
光电子学
有限元法
光纤
波长
光学
纳米技术
纳米颗粒
电子工程
物理
工程类
热力学
物理化学
化学
作者
J. Divya,S. Selvendran,Anita Raja,K. Chitra
出处
期刊:Physica Scripta
[IOP Publishing]
日期:2024-01-05
卷期号:99 (2): 025505-025505
被引量:1
标识
DOI:10.1088/1402-4896/ad1864
摘要
Abstract Photonic crystal fiber (PCF) based surface plasmon resonance (SPR) sensors are emerging as a promising technology for ultrasensitive detection of various biological and chemical analytes. This paper presents a novel D-shaped PCF based SPR sensor, which has shown great potential for highly sensitive detection of refractive index (RI) changes. The D-shaped configuration is achieved through the polishing of the upper side of the PCF fiber. To enhance sensitivity, a 0.1 μ m silver layer is strategically placed between the fiber and analyte, intensifying light–matter interactions. Additionally, a 0.05 μ m titanium dioxide (TiO 2 ) layer is employed not only to further boost sensitivity but also to shield the metal from oxidation, ensuring the longevity and stability of the sensor. The finite element method (FEM) is employed to optimize the structural parameters of the sensor design. The findings demonstrate that the proposed SPR sensor is sensitive to RI changes in the 1.31–1.35 range, achieving a peak wavelength sensitivity of 30000 nm RIU −1 and an amplitude sensitivity of −185.33 RIU −1 . The sensor holds promise for diverse applications, including chemical and biological sensing, making it a versatile tool with promising implications for advancing sensing technologies in various domains.
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