Design and analysis of arc-shaped single core photonic crystal fiber sensor based on surface plasmon resonance

IF 2.5 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2023-12-10 DOI:10.1016/j.photonics.2023.101218
Tasmiah Tunazzina , Fairuz Areefin Khan , Anuva Chowdhury
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Abstract

The selection of a suitable plasmonic material is crucial for achieving high-performance photonic crystal fiber-based surface plasmon resonance (PCF-SPR) sensors. However, most numerical investigations have been limited to PCF-SPR sensors with conventional circularly coated plasmonic metals due to their availability and rigid properties. In this work, a single-core arc-shaped PCF is designed and studied with sensing ingredients coated outside the fiber. The simulation and numerical analyses are performed using the full-vector finite element method to examine the effects of using gold as an active metal and also the deposition of Ta2O5 on gold. The results show that the arc-shaped sensor with gold film can obtain the maximum wavelength interrogation sensitivity (WIS) of 9500 nm/RIU within the refractive index (RI) range of 1.25–1.39 while the maximum amplitude interrogation sensitivity (AIS) reaches 579.26 RIU−1 at 1.39 and resolution is 1.05 × 10−5. However, depositing Ta2O5 on the gold gives an improved maximum WIS and AIS of 22,000 nm/RIU and 1209.21 RIU−1, respectively. With the coating of Ta2O5, the resolution improves to 4.55 × 10−6, making the proposed sensor design undoubtedly effective in detecting food chemicals such as butyl acetate and hydrocarbons along with different bio-analyte samples with a wide range of RI.

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基于表面等离子体共振的弧形单芯光子晶体光纤传感器的设计与分析
要实现基于光子晶体光纤的高性能表面等离子体共振(PCF-SPR)传感器,选择合适的等离子体材料至关重要。然而,由于传统圆形涂层等离子金属的可用性和刚性特性,大多数数值研究仅限于 PCF-SPR 传感器。在这项研究中,我们设计并研究了一种在光纤外部涂有传感成分的单芯弧形 PCF。使用全矢量有限元法进行了模拟和数值分析,以研究使用金作为活性金属以及在金上沉积 Ta2O5 的影响。结果表明,在折射率(RI)为 1.25-1.39 的范围内,金膜弧形传感器的最大波长询问灵敏度(WIS)为 9500 nm/RIU,而在 1.39 时,最大振幅询问灵敏度(AIS)为 579.26 RIU-1,分辨率为 1.05 × 10-5。然而,在金上沉积 Ta2O5 后,最大 WIS 和 AIS 分别提高到 22,000 nm/RIU 和 1209.21 RIU-1。镀上 Ta2O5 后,分辨率提高到了 4.55 × 10-6,这使得拟议的传感器设计在检测食品化学物质(如醋酸丁酯和碳氢化合物)以及不同生物分析物样品(RI 范围很广)方面无疑是有效的。
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来源期刊
CiteScore
5.00
自引率
3.70%
发文量
77
审稿时长
62 days
期刊介绍: This journal establishes a dedicated channel for physicists, material scientists, chemists, engineers and computer scientists who are interested in photonics and nanostructures, and especially in research related to photonic crystals, photonic band gaps and metamaterials. The Journal sheds light on the latest developments in this growing field of science that will see the emergence of faster telecommunications and ultimately computers that use light instead of electrons to connect components.
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