D 形光子晶体光纤传感器的灵敏度增强:金与银的等离子层

IF 3.3 4区 物理与天体物理 Q2 CHEMISTRY, PHYSICAL
Pakarzadeh Hassan, Sharif Vahid, Saberi Hana, Rahmanfar Zahra, Hajivandi Jamileh
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引用次数: 0

摘要

近年来,表面等离子体共振(SPR)传感器在医疗诊断和生化材料等各种应用领域备受关注。在 SPR 传感器中,基于光子晶体光纤(PCF)的 D 型结构显示出非常高的性能,而且易于使用。本文提出了一种基于 D 型 PCF 的 SPR 传感器的简单设计,并对其几何参数进行了优化。金和银被视为 D 型 PCF 传感器表面的等离子体层。通过使用有限差分特征模式 (FDE) 方法进行多次模拟,研究了各种金银厚度值,以获得最高的灵敏度和分辨率。结果表明,在分析物折射率(RI)为 1.41 时,金厚度为 44 nm 时,灵敏度和分辨率最高,分别为 25,600 nm/RIU 和 (3.9\times {10}^{-6}\)。同时,在分析物折射率为 1.29 至 1.40 的范围内,银的灵敏度高于金。与其他 SPR 传感器相比,所提出的传感器具有更优越的特性,可被视为具有高灵敏度、高线性度和高分辨率的 RI 测量的理想选择。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Sensitivity Enhancement in D-Shaped Photonic Crystal Fiber Sensors: Gold Versus Silver Plasmonic Layers

Sensitivity Enhancement in D-Shaped Photonic Crystal Fiber Sensors: Gold Versus Silver Plasmonic Layers

Surface plasmon resonance (SPR) sensors have attracted great attention in recent years for various applications such as medical diagnosis and biochemical materials. Among SPR sensors, D-shaped structures based on photonic crystal fibers (PCFs) have shown very high performance and are easy to use. In this paper, a simple design of SPR sensors based on the D-shaped PCFs with the optimized geometrical parameters is proposed. Gold and silver are considered as plasmonic layers on the surface of the D-shaped PCF sensor. By performing multiple simulations using the finite-difference eigenmode (FDE) method, various values of gold and silver thicknesses are investigated to achieve the highest sensitivity and resolution. The results indicate that the highest sensitivity and resolution of 25,600 nm/RIU and \(3.9\times {10}^{-6}\) are achieved respectively for a gold thickness of 44 nm at the analyte refractive index (RI) of 1.41. Meanwhile, for an analyte RI range of 1.29 to 1.40, silver demonstrates greater sensitivity than gold in the same range. The proposed sensor with superior characteristics compared with other SPR sensors can be considered as a very good candidate for RI measurement with high sensitivity, linearity, and resolution.

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来源期刊
Plasmonics
Plasmonics 工程技术-材料科学:综合
CiteScore
5.90
自引率
6.70%
发文量
164
审稿时长
2.1 months
期刊介绍: Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons. Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.
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