A study of highly sensitive D-shaped optical fiber surface plasmon resonance based refractive index sensor using grating structures of Ag-TiO2 and Ag-SnO2

Dubey, Sarvesh K.; Kumar, Anil; Kumar, Awadhesh; Pathak, Amit; Srivastava, Sanjay

doi:10.1016/j.ijleo.2021.168527

Cited by 26 publications

(4 citation statements)

References 52 publications

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“…A D-type optical fibre SPR sensor is fabricated by removing a small part of cladding from the optical fibre to expose the fibre core and by decorating the sensing films between the unclad fibre core and analyte samples [22]. Many studies show that the D-type optical fibre surface plasma sensor modified with different materials, such as graphene-coated silver nano-columns [23], the dielectric buffer layer and gold film [24], gold film [25], gold film and covering layer [26], graphene-based maghemite nanocomposite [27], silver coated with titanium dioxide, and Tin dioxide layer [28], can realise high-sensitivity detection of the analyte.…”

Section: Introductionmentioning

confidence: 99%

A surface plasmon resonance haemoglobin concentration sensor based on D‐type optical fibre with a graphene‐gold surface architecture

Shi

Guo

et al. 2023

IET Optoelectronics

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In this study, a surface plasmon resonance sensor for detecting haemoglobin concentration based on a D‐type optical fibre with a graphene‐gold surface architecture is proposed. The graphene‐gold surface architecture included a 50 nm thick gold film and monolayer graphene film, which were decorated on a 10 mm long D‐type sensing region. The proposed sensor worked in wavelength interrogation mode, with the light wavelength ranging from 400 to 1100 nm. The authors realised the D‐type optical fibre surface polishing process, the gold film vacuum coating process, and the chemical‐vapour‐deposited graphene's wet transfer process. Furthermore, the fabricated sensors were used to detect the refractive index (RI) of haemoglobin samples, which varied from 1.331 to 1.346. Experiment results show that the fitted RI sensitivity of the sensor decorated with gold and graphene reaches 1874.41 nm/RIU, 4.995% higher than that of the sensor decorated only with gold. The concentration sensitivity of the sensor coated with gold and graphene film is 4.96 nm/(g/dL), and the proposed sensor can provide a resolution of 20.2 mg/dL for haemoglobin concentration detection.

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Section: Introductionmentioning

confidence: 99%

A surface plasmon resonance haemoglobin concentration sensor based on D‐type optical fibre with a graphene‐gold surface architecture

Shi

Guo

et al. 2023

IET Optoelectronics

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“…In order to design such periodic microstructures, traditional scalar diffraction theory is not applicable, and vector diffraction theory is required to design. The double-groove transmission grating in this paper is presented by using finite element method (FEM) [15][16][17][18] from vector diffraction theory.…”

Section: Introductionmentioning

confidence: 99%

High uniformity splitter with great inhibition of ±1st orders

Wang,

Liu

2023

Laser Phys.

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A transmissive double-groove grating under vertical incidence is proposed in this paper. The grating has a total of five diffraction orders, and the effect of a three-channel beam splitter is achieved by inhibiting the diffraction efficiency of ±1st orders. This is a polarization-independent micro-nano structure that achieves triple beam splitting under both TE and TM polarization. The diffraction efficiency of the 0th order and ±2nd orders for TE polarization orders can reach 32.55% and 32.72%, respectively. And the diffraction efficiency of 0th order and ±2nd orders for TM polarization can reach 32.28% and 32.59%, respectively. Both TE and TM polarization can achieve 99% uniformity. The grating performs well in terms of manufacturing tolerances and immunity to interference.

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“…Since the penetration depth is proportional to the working wavelength, compared with visible light, NIR light can penetrate deeply into biological tissues, which means that the evanescent wave in the NIR band is conducive to improving the detection sensitivity of SPR sensors for biological macromolecular targets, and avoid photodamage and phototoxicity to biological materials due to its non-ionizing nature. Therefore, NIR light has great application value in the fields of medical imaging and biosensing [9][10][11][12]. To achieve a wider range of NIR sensing, a suitable plasma material needs to be selected.…”

Section: Introductionmentioning

confidence: 99%

Characterization of incompletely coated D-shaped PCF-SPR refractive index sensors

Jiang,

Shen,

Feng

et al. 2023

Phys. Scr.

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To reduce the complexity of the sensor structure and improve the sensitivity of refractive index (RI) measurement, a D-shaped photonic crystal fiber (PCF) surface plasmon resonance (SPR) RI sensor with incomplete coating of gold-tantalum pentoxide (Au-Ta2O5) on the surface is proposed. When the coating width is 3.1μm, the sensor can detect RI samples ranging from 1.35 to 1.41 in the ultra-wide near-infrared (NIR) region of 1100-2100 nm wavelength. Its maximum wavelength sensitivity is 20,000 nm/RIU, maximum amplitude sensitivity is 2817.7 RIU-1, resolution is 5×10-6RIU, and figure of merit (FOM) is 333.3RIU-1. This sensor can be widely used in biological tissue detection. For this type of incomplete coated D-shaped sensor, the coating material and structural parameters not only affect the performance of the sensor, but also change the RI detection range, which has been ignored or not mentioned in previous literature on PCF-SPR sensors. Therefore, the reasons for the change of RI detection interval and negative optimization caused by structural parameters were analyzed, and two different sensors with different coating widths were finally obtained, which can achieve high sensitivity sensing in their respective detection intervals. The detailed research results expand the understanding of the SPR phenomenon in D-shaped PCF and provide theoretical guidance for adjusting and improving the detection performance of PCF-SPR sensors.

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A study of highly sensitive D-shaped optical fiber surface plasmon resonance based refractive index sensor using grating structures of Ag-TiO2 and Ag-SnO2

Cited by 26 publications

References 52 publications

A surface plasmon resonance haemoglobin concentration sensor based on D‐type optical fibre with a graphene‐gold surface architecture

A surface plasmon resonance haemoglobin concentration sensor based on D‐type optical fibre with a graphene‐gold surface architecture

High uniformity splitter with great inhibition of ±1st orders

Characterization of incompletely coated D-shaped PCF-SPR refractive index sensors

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