Photonic crystal fiber based surface plasmon resonance chemical sensors

Zhao, Yong; Deng, Ze-qun; Li, Jin

doi:10.1016/j.snb.2014.05.127

Cited by 180 publications

(82 citation statements)

References 40 publications

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“…Even though existing physical and chemical methods [15], suggest that 2 5 Ta O has an acceptable slab waveguide loss of ~1 dB/cm, at both visible and infra-red wavelengths, making it ideal for MOF applications [16], ultimately, device sensitivity is lowered as some field energy required to excite a strong enough plasmon for sensing is lost to scattering. Tantalum oxide shows a wide spectral range of high transparency, low losses and a high melting point making stable in comparison to material like ITO or silicon [17].…”

Section: Theorymentioning

confidence: 99%

Multi-channel SPR biosensor based on PCF for multi-analyte sensing applications

Otupiri¹,

Akowuah²,

Haxha³

2015

Opt. Express

162

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This paper presents a theoretical investigation of a novel holey fiber (Photonic Crystal Fiber (PCF)) multi-channel biosensor based on surface plasmon resonance (SPR). The large gold coated micro fluidic channels and elliptical air hole design of our proposed biosensor aided by a high refractive index over layer in two channels enables operation in two modes; multi analyte sensing and self-referencing mode. Loss spectra, dispersion and detection capability of our proposed biosensor for the two fundamental modes (

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Section: Theorymentioning

confidence: 99%

Multi-channel SPR biosensor based on PCF for multi-analyte sensing applications

Otupiri¹,

Akowuah²,

Haxha³

2015

Opt. Express

162

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“…SPR sensors exhibit high sensitivity characteristics, which enables a new window for numerous promising applications including biological sample detection, antibody-antigen interaction, medical diagnosis, organic-chemical sensing, food quality control, bioimaging, environment monitoring, and so on [1][2][3][4]. The idea of a surface plasmon (SP) phenomenon was first theoretically demonstrated by Ritchie et al in the 1950s [5].…”

Section: Introductionmentioning

confidence: 99%

A Highly Sensitive Gold-Coated Photonic Crystal Fiber Biosensor Based on Surface Plasmon Resonance

et al. 2017

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Abstract:In this paper, we numerically demonstrate a two-layer circular lattice photonic crystal fiber (PCF) biosensor based on the principle of surface plasmon resonance (SPR). The finite element method (FEM) with circular perfectly matched layer (PML) boundary condition is applied to evaluate the performance of the proposed sensor. A thin gold layer is deposited outside the PCF structure, which acts as the plasmonic material for this design. The sensing layer (analyte) is implemented in the outermost layer, which permits easy and more practical fabrication process compared to analyte is put inside the air holes. It is demonstrated that, at gold layer thickness of 40 nm, the proposed sensor shows maximum sensitivity of 2200 nm/RIU using the wavelength interrogation method in the sensing range between 1.33-1.36. Besides, using an amplitude interrogation method, a maximum sensitivity of 266 RIU −1 and a maximum sensor resolution of 3.75 × 10 −5 RIU are obtained. We also discuss how phase matching points are varied with different fiber parameters. Owing to high sensitivity and simple design, the proposed sensor may find important applications in biochemical and biological analyte detection.

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“…Prior works published in the open literature have demonstrated that PCF mode interferometers coated with dielectric layers or nanomaterials allow the development of highly sensitive refractive index or biosensors [70,71]. PCFs coated or infiltrated with gold layers or nanowires have been demonstrated for chemical and multianalyte biosensing [72,73]. In these cases the phenomenon of surface plasmon resonance is exploited.…”

Section: Trends In Pcf Sensingmentioning

confidence: 99%