Analysis of Phase Interrogated SPR Fiber Optic Sensors With Bimetallic Layers

Moayyed, Hamed; Leite, Ivo T.; Coelho, L.; Santos, J. L.; Viegas, Diana

doi:10.1109/jsen.2014.2329918

Cited by 39 publications

(10 citation statements)

References 26 publications

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“…A less common interrogation technique used in SPR fiber sensors is phase interrogation. The method relies on analyzing the phase difference between two light polarizations, p- and s-, at the resonance in the transmitted or back-reflected light [ 29 , 30 , 31 ]. This technique offers advantages of lower resolution and higher dynamic range when compared to other methods [ 31 ].…”

Section: Operating Principles Of Plasmonic Fiber Sensorsmentioning

confidence: 99%

“…The method relies on analyzing the phase difference between two light polarizations, p- and s-, at the resonance in the transmitted or back-reflected light [ 29 , 30 , 31 ]. This technique offers advantages of lower resolution and higher dynamic range when compared to other methods [ 31 ]. However, the requirement for more complex optical instruments and data processing methodologies result in limited applications for this interrogation technique in the context of fiber-based SPR sensors.…”

Section: Operating Principles Of Plasmonic Fiber Sensorsmentioning

confidence: 99%

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Plasmonic Fiber Optic Refractometric Sensors: From Conventional Architectures to Recent Design Trends

Klantsataya

Jia

Ebendorff-Heidepriem

et al. 2016

Sensors

163

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Surface Plasmon Resonance (SPR) fiber sensor research has grown since the first demonstration over 20 year ago into a rich and diverse field with a wide range of optical fiber architectures, plasmonic coatings, and excitation and interrogation methods. Yet, the large diversity of SPR fiber sensor designs has made it difficult to understand the advantages of each approach. Here, we review SPR fiber sensor architectures, covering the latest developments from optical fiber geometries to plasmonic coatings. By developing a systematic approach to fiber-based SPR designs, we identify and discuss future research opportunities based on a performance comparison of the different approaches for sensing applications.

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Section: Operating Principles Of Plasmonic Fiber Sensorsmentioning

confidence: 99%

Section: Operating Principles Of Plasmonic Fiber Sensorsmentioning

confidence: 99%

Plasmonic Fiber Optic Refractometric Sensors: From Conventional Architectures to Recent Design Trends

Klantsataya

Jia

Ebendorff-Heidepriem

et al. 2016

Sensors

163

View full text Add to dashboard Cite

show abstract

“…However, it gets oxidized easily when used in liquid or gaseous environments. To solve the oxidization problem, some researchers proposed Au-Ag bimetallic structure SPR sensors [9,10]. Ag is the major SPR metal used to support SPs, and Au is the outer-protective layer used to improve the sensor's chemical stability.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Graphene-Based Photonic Crystal Fiber Sensor Using Birefringence and Surface Plasmon Resonance

et al. 2016

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We present and numerically characterize a photonic crystal fiber (PCF)-based surface plasmon resonance (SPR) sensor. By adjusting the air hole sizes of the PCF, the effective refractive index (RI) of core-guided mode can be tuned effectively and the sensor exhibits strong birefringence. Alternate holes coated with graphene-Ag bimetallic layers in the second layer are used as analyte channels, which can avoid adjacent interference and improve the signal to noise ratio (SNR). The graphene's good features can not only solve the problem of silver oxidation but also increase the absorption of molecules. We theoretically analyze the influence of the air hole sizes of the PCF and the thicknesses of graphene layer and Ag layer on the performance of the designed sensor using wavelength and amplitude interrogations. The wavelength sensitivity we obtained is as high as 2520 nm/RIU with the resolution of 3.97 × 10 −5 RIU, which can provide a reference for developing a high-sensitivity, real-time, fast-response, and distributed SPR sensor.

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“…The refractive indices for the metal and oxide layers are obtained from experimental data available in literatures [32][33][34][35]. Concerning the metallic layer, we have found in a previous study that silver is the most adequate one [36]. Figure 3 shows the spectrum of the light returning from the sensing head for different thicknesses of the silver layer, and when combined with the spectral curves obtained when the oxide layer is included, it turns out the best thickness for the silver layer is 80 nm, so this value is set for the analysis that provides the results delivered in the following.…”

Section: Resultsmentioning

confidence: 99%

Analysis of a plasmonic based optical fiber optrode with phase interrogation

et al. 2016

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Optical fiber optrodes are attractive sensing devices due to their ability to perform point measurement in remote locations. Mostly, they are oriented to biochemical sensing, quite often supported by fluorescent and spectroscopic techniques, but with the refractometric approach considered as well when the objective is of high measurement performance, particularly when the focus is on enhancing the measurand resolution. In this work, we address this subject, proposing and analyzing the characteristics of a fiber optic optrode relying on plasmonic interaction. A linearly tapered optical fiber tip is covered by a double overlay: the inner one -a silver thin film and over ita dielectric layer, with this combination allowing to achieve, at a specific wavelength range, surface plasmonic resonance (SPR) interaction sensitive to the refractive index of the surrounding medium. Typically, the interrogation of the SPR sensing structures is performed, considering spectroscopic techniques, but in principle, a far better performance can be obtained, considering the reading of the phase of the light at a specific wavelength located within the spectral plasmonic resonance. This is the approach which is studied here in the context of the proposed optical fiber optrode configuration. The analysis performed shows the combination of a silver inner layer with a dielectric titanium oxide layer with tuned thicknesses enables sensitive phase reading and allows the operation of the fiber optic optrode sensor in the third telecommunication wavelength window.

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Analysis of Phase Interrogated SPR Fiber Optic Sensors With Bimetallic Layers

Cited by 39 publications

References 26 publications

Plasmonic Fiber Optic Refractometric Sensors: From Conventional Architectures to Recent Design Trends

Plasmonic Fiber Optic Refractometric Sensors: From Conventional Architectures to Recent Design Trends

Analysis of Graphene-Based Photonic Crystal Fiber Sensor Using Birefringence and Surface Plasmon Resonance

Analysis of a plasmonic based optical fiber optrode with phase interrogation

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