Ultrahigh sensitivity refractive index biosensor based on gold coated nano-film photonic crystal fiber

Abdullah, Hasan Zuhudi; Ahmed, Kawsar; Mitu, Sumaiya Akhtar

doi:10.1016/j.rinp.2020.103151

Cited by 32 publications

(9 citation statements)

References 40 publications

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“…The molecules present on the microresonator surface can lead to changes in the refractive index (RI) in a similar way to those in SPR-based sensors, but in micro-resonators, these changes can further lead to shifts in resonance wavelength. 82,117,118 Based on this principle, Lerma Arce et al incorporated a silicon nanophotonic microring resonator into a DMF to achieve label-free detection in real-time. 82 In this platform, a silicon-on-insulator (SOI) chip was used as the sensing component on the top substrate of the DMF device owing to its high refractive index contrast, which eliminated the need for bulky instruments such as high power lasers and spectrometers, while the droplet was handled on the bottom plate.…”

Section: Sensors and Diagnosticsmentioning

confidence: 99%

Advances in integrated digital microfluidic platforms for point-of-care diagnosis: a review

Zhang

Liu

2022

Sens. Diagn.

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Section: Sensors and Diagnosticsmentioning

confidence: 99%

Advances in integrated digital microfluidic platforms for point-of-care diagnosis: a review

Zhang

Liu

2022

Sens. Diagn.

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“…Applying the drilling technique, a computer-controlled mill has been used to drill air holes in the solid rode and solid tube, and draws them to the inner and outer air structure fibers, respectively [ 52 ]. Using the chemical vapor deposition (CVD) method, gold has been deposited at the outer side of the microfiber [ 53 , 54 ]. In the same way, MgF

has been deposited at the inner side of the fiber.…”

Section: Fabrication Possibility and Application Areamentioning

confidence: 99%

Highly Sensitive Twin Resonance Coupling Refractive Index Sensor Based on Gold- and MgF2-Coated Nano Metal Films

et al. 2021

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A plasmonic material-coated circular-shaped photonic crystal fiber (C-PCF) sensor based on surface plasmon resonance (SPR) is proposed to explore the optical guiding performance of the refractive index (RI) sensing at 1.7–3.7 μm. A twin resonance coupling profile is observed by selectively infiltrating liquid using finite element method (FEM). A nano-ring gold layer with a magnesium fluoride (MgF2) coating and fused silica are used as plasmonic and base material, respectively, that help to achieve maximum sensing performance. RI analytes are highly sensitive to SPR and are injected into the outmost air holes of the cladding. The highest sensitivity of 27,958.49 nm/RIU, birefringence of 3.9 ×10−4, resolution of 3.70094 ×10−5 RIU, and transmittance dip of −34 dB are achieved. The proposed work is a purely numerical simulation with proper optimization. The value of optimization has been referred to with an experimental tolerance value, but at the same time it has been ensured that it is not fabricated and tested. In summary, the explored C-PCF can widely be eligible for RI-based sensing applications for its excellent performance, which makes it a solid candidate for next generation biosensing applications.

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“…Recently, in the year 2020, a duplex core SPR sensor has been intended and reported the AS response of 1770 RIU −1 for the analyte RI value from 1.33 to 1.40 and the WS response of 10,700 nm/RIU is noted [27]. Additionally, the WS response of 45003.05 nm/RIU has been achieved using a Au layer thickness of 50 nm [28]. The reported sensitivity was better than the previous works but the gold layer thickness was very high.…”

Section: Introductionmentioning

confidence: 99%

Surface Plasmon Resonance Based Refractive Index Biosensor: A External Sensing Approach

Mitu

Aktar

Ibrahim

et al. 2022

Preprint

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A surface plasmon resonance (SPR) based sensor founded on Photonic crystal fiber (PCF) is suggested and numerically analyzed in the manuscript. The refractive index (RI) detecting SPR based sensor has the ability to identify the analyte range from 1.33 to 1.4. Pure silica is used as a base material and it has high RI value than the analyte RI. Furthermore, an analyte layer and chemically stable gold (Au) layer are also placed at the sensor design. The simulations are done based on the Finite Element Method (FEM). Here, the scaled-down approach has the necessity to increase phase matching point within the core mode and surface plasmon polariton (SPP) mode which tends to the sensor to reach high sensitivity response. At the intersect point of core and SPP mode, the loss curve shows a maximum peak value. The suggested sensor shows the highest wavelength sensitivity (WS) response of 35,943.22 nm/RIU, amplitude sensitivity (AS) response of 2321.36 RIU−1, sensor resolution of 9.04×10−6 RIU, and Figure of merit (FOM) value of 600. It is noted that all the optical parameters show better performance analysis. Furthermore, an external sensing approach provides more fabrication feasibility which marks the offered sensor more suitable for practical experimentation. Besides, the investigated sensor provides the maximum and rapid sensing performance that will be helpful for microfluidic analyte detection, detection of biomolecules, medical diagnostics, virus detection, security, and bio-imaging.

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Ultrahigh sensitivity refractive index biosensor based on gold coated nano-film photonic crystal fiber

Cited by 32 publications

References 40 publications

Advances in integrated digital microfluidic platforms for point-of-care diagnosis: a review

Advances in integrated digital microfluidic platforms for point-of-care diagnosis: a review

Highly Sensitive Twin Resonance Coupling Refractive Index Sensor Based on Gold- and MgF2-Coated Nano Metal Films

Surface Plasmon Resonance Based Refractive Index Biosensor: A External Sensing Approach

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