Fiber optic coupled surface plasmon resonance sensor based Ag-TiO2 films for hydrogen detection

Deng, Yali; Li, Mei; Cao, Wen; Wang, Ming; Huang, Hui; Xia, Wei; Su, Fu

doi:10.1016/j.yofte.2021.102616

Cited by 17 publications

(5 citation statements)

References 18 publications

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“…This issue is resolved by using a guided wave structure, which is a thin dielectric nanolayer with a high dielectric constant on the metal film, to boost the SPR biosensor’s sensitivity [ 21 , 22 , 23 , 24 ]. For example, Deng used titanium dioxide (TiO 2 ) film in a SPR gas sensor and obtained high sensitivity in hydrogen detection at the telecommunications wavelength [ 25 ]. However, the waveguide layer also widens the dip of reflectivity and decrease its depth [ 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

An Improved Seeker Optimization Algorithm for Phase Sensitivity Enhancement of a Franckeite- and WS2-Based SPR Biosensor for Waterborne Bacteria Detection

Yue,

Zhao,

Tao

et al. 2024

Micromachines

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For the purpose of detecting waterborne bacteria, a high-phase-sensitivity SPR sensor with an Ag–TiO2–Franckeite–WS2 hybrid structure is designed using an improved seeker optimization algorithm (ISOA). By optimizing each layer of sensor construction simultaneously, the ISOA guarantees a minimum reflectance of less than 0.01 by Ag (20.36 nm)–TiO2 (6.08 nm)–Franckeite (monolayer)–WS2 (bilayer) after 30 iterations for E. coli. And the optimal phase sensitivity is 2.378 × 106 deg/RIU. Sensor performance and computing efficiency have been greatly enhanced using the ISOA in comparison to the traditional layer-by-layer technique and the SOA method. This will enable sensors to detect a wider range of bacteria with more efficacy. As a result, the ISOA-based design idea could provide SPR biosensors with new applications in environmental monitoring.

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Section: Introductionmentioning

confidence: 99%

An Improved Seeker Optimization Algorithm for Phase Sensitivity Enhancement of a Franckeite- and WS2-Based SPR Biosensor for Waterborne Bacteria Detection

Yue,

Zhao,

Tao

et al. 2024

Micromachines

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“…by using this phenomenon, it is possible to design SPR sensors that detect different analytes. One way to excite surface plasmons is to use prisms that form the Kershman and Otto configurations [8,9]. In recent years, PCF sensors have been designed and introduced based on SPRs.…”

Section: Introductionmentioning

confidence: 99%

A comparative analysis of a D-shaped photonic crystal sensor based on graphene plasmonic

Hajiani

Eskandari

2023

Phys. Scr.

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In this paper, a D-shaped photonic crystal fiber (PCF) sensor based on surface plasmon resonance has been presented. In the proposed structure, Graphene, Gold, and Silver have been used in different configurations in order to promote the sensitivity of the sensor. According to the numerical simulations performed by the finite element method (FEM) and considering the refractive index of the analyte from 1.36 to 1.40, the maximum wavelength sensitivity of 12600 nm/RIU has been obtained, which is related to the structure when the Gold layer sandwiched between two Graphene layers. This is while, the maximum amplitude sensitivity of the proposed sensor is 5708 (RIU-1), which is related to the configuration that Graphene has been placed under the Silver layer. On the other hand, the proposed structure is easy to use because there is no need to fill the fiber holes with the analyte and it can be easily placed on the D-shaped surface of the sensor. The proposed sensor is appropriate to sense the biological variation because of showing strong surface plasmon resonances. The effect of the fabrication tolerance on the proposed PCF is also studied. It is expected that the proposed model will be compatible with the bio-engineering approaches.

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“…Now, optical fiber is used instead of prism, metal, and other nanomaterials as well as tunable laser light source to excite SPR in wavelength interrogation mode. Thus far, optical fiber-based SPR sensor has been demonstrated both experimentally and theoretically in many research studies [11][12][13][14][15][16]. Compared with the prism-based Kretschmann configuration, the optical fiber-based SPR sensor provides several benefits such as simplified, flexible optical design, convenience for remote sensing, continuous analysis, and in situ monitoring [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity enhancement of a wavelength interrogation-based optical fiber surface plasmon resonance sensor for hemoglobin concentration using barium titanate

Shi¹,

Guo²,

Li³

et al. 2023

Optica Applicata

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In this paper, the performances of a wavelength interrogation-based optical fiber surface plasmon resonance sensor for hemoglobin (Hb) concentration is investigated by theoretical simulation. The proposed configuration incorporates optical fiber, 70 nm silver, 18 nm barium titanate (BaTiO3), and 2 nm zinc oxide. Simulation results show the sensor exhibits refractive index sensitivity of 4023 nm/RIU and concentration sensitivity of 10.0873 nm/(g·dL), along with Hb concentration varying from 0 to 14 g/dL. This paper especially focuses on the influence of BaTiO3 on the performances of the proposed sensor with light wavelength ranging from 350 to 1000 nm. Comparison analysis indicates sandwiching 18 nm BaTiO3 between sensing layers not only enhances the concentration sensitivity by 30.14% but also decreases the nonlinear error of the sensor from 0.68% to 0.63%. For a wavelength accuracy of 0.1 nm, the proposed sensor can provide a resolution of 0.0099 g/dL for Hb concentration detection.

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Fiber optic coupled surface plasmon resonance sensor based Ag-TiO2 films for hydrogen detection

Cited by 17 publications

References 18 publications

An Improved Seeker Optimization Algorithm for Phase Sensitivity Enhancement of a Franckeite- and WS2-Based SPR Biosensor for Waterborne Bacteria Detection

An Improved Seeker Optimization Algorithm for Phase Sensitivity Enhancement of a Franckeite- and WS2-Based SPR Biosensor for Waterborne Bacteria Detection

A comparative analysis of a D-shaped photonic crystal sensor based on graphene plasmonic

Sensitivity enhancement of a wavelength interrogation-based optical fiber surface plasmon resonance sensor for hemoglobin concentration using barium titanate

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