A Bimetallic-Coated, Low Propagation Loss, Photonic Crystal Fiber Based Plasmonic Refractive Index Sensor

Mahfuz, Mohammad Al; Hossain, Md. Anwar; Haque, Emranul; Hai, Nguyen Hoang; Namihira, Y.; Ahmed, Feroz

doi:10.3390/s19173794

Cited by 65 publications

(21 citation statements)

References 32 publications

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“…Increasing the gold layer thickness would cause the peak loss to change towards a longer wavelength (red shift). The definition of the red or blue shift (movement to a shorter wavelength) can be determined by the equation [ 44 ] d p = 1/kβ = λ /2πβ, where d p is the evanescent wave’s penetration depth, and β and k are the decay constant and wave number, respectively. The equation n eff = β/k 0 , k 0 = 2π/ λ , where k 0 = 2π/ λ is the wave number in the free space.…”

Section: Resultsmentioning

confidence: 99%

Highly Sensitive Graphene-Au Coated Plasmon Resonance PCF Sensor

Yang

Liu

Chen

et al. 2021

Sensors

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This paper presents a graphene-Au coated photonic crystal fiber (PCF) sensor in the visible regime. Designing a side-polish D-shaped plane over the PCF’s defect of the periodic air holes can effectively enhance the evanescent field. Graphene on gold can enhance the sensor’s sensitivity because it can stably adsorb biomolecules and increase the propagation constant of the surface plasmon polariton (SPP). Using the finite element method (FEM), we demonstrated that the sensing performance is greatly improved by optimizing the PCF’s geometric structural parameter. The proposed PCF sensor exhibited high performance with a maximum wavelength sensitivity of 4200 nm/RIU, maximum amplitude sensitivity of 450 RIU−1, and refractive index resolution of 2.3 × 10−5 RIU in the sensing range 1.32–1.41. This research provides a potential application for the design a new generation of highly sensitive biosensors.

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Section: Resultsmentioning

confidence: 99%

Highly Sensitive Graphene-Au Coated Plasmon Resonance PCF Sensor

Yang

Liu

Chen

et al. 2021

Sensors

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“…The impact of changing the thickness of TiO 2 and Au on loss curves is shown in Figure 6 a,b. Increasing the Gold layer thickness increased the damping loss, which resulted in poor penetration in the evanescent field, which results in low confinement loss [ 28 , 29 ]. Significant blueshift was seen with low confinement loss when changing the thickness of Gold from 45 to 85 nm.…”

Section: Resultsmentioning

confidence: 99%

“…As a result, it shows excellent performance compared to others. Furthermore, the lowest 8.62 × 10 −7 RIU resolution was achieved when using plasmonic material silver, which shows that the proposed sensor can detect fractional micro-scale changes in analyte [ 28 ].…”

Section: Resultsmentioning

confidence: 99%

Sensitivity Enhancement of Modified D-Shaped Microchannel PCF-Based Surface Plasmon Resonance Sensor

Noman

Haque

Hossain

et al. 2020

Sensors

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In this work, a highly sensitive dual-core configured microchannel-based plasmonic refractive index (RI) sensor was investigated, which can be used for low RI detection. Both the sensing layer and the plasmonic material layer were built outside of the fiber design to detect the surrounding medium’s RI changes. Additionally, the effects of different plasmonic materials gold (Au), silver (Ag), and copper (Cu) toward sensitivity were investigated for the same structure. An adhesive agent was used in this work, titanium dioxide (TiO2), and was coated on top of the plasmonic material to prevent the oxidation of Ag and Cu. The coupling strength between the fundamental mode and the surface plasmon polariton (SPP) mode was observed to be very strong due to the TiO2 adhesive agent. With a resolution of 7.41 × 10−7 RIU, maximum wavelength sensitivity (WS) of 135,000 nm/RIU and amplitude sensitivity (AS) of 3239 RIU−1 were achieved using the proposed sensor while using Au as a plasmonic material for an analyte RI range of 1.29–1.39. A detailed study of relevant literature revealed that the achieved wavelength sensitivity for plasmonic material gold (Au) is the highest among reported photonic crystal fiber (PCF)-surface plasmon resonance (SPR) sensors to date.

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“…(a) Analyte-filled cladding holes [54], (b) externally coated PCF [55], and (c) D-shaped PCF SPR sensor [56]. [63] holes and the separation gap between them defines the light propagation characteristics of PCFs. These sensors own other advantages including small size and flexible structural design over conventional optical fiber and prism coupler SPR sensors.…”

Section: Figurementioning

confidence: 99%

Principles and Applications of Nanoplasmonics in Biological and Chemical Sensing: A Review

Sohi¹,

Kahrizi²

2020

Recent Advances in Nanophotonics - Fundamentals and Applications

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Biosensing requires a highly sensitive real-time detection of the biomolecules. These properties are granted by nanoplasmonic sensing techniques. SPR-based optical sensors have evolved as a sensitive and versatile biosensing tool. A growing number of SPR-based sensing applications in the solution of clinical problems are reported in the recent years. This refers to the point that these sensors provide label-free detection of the living cells and non-destructive analysis techniques. In this study, we will review the mechanism of the detection in SPR biosensing, followed by the methods used to develop sensors to detect gases and the chemical, biological, and molecular interaction. The device sensitivity improvement based on plasmonic effects is also addressed in this study, and accordingly, the size and material dependence of the resonance frequency are discussed. The reviewed articles are categorized into three groups, depending on the SPR excitation configuration. In the first group of the sensors, the sensitivity of LSPR-based sensors in prism coupler configurations is reviewed. The second group, SPR excitation by optical fiber, slightly improved the sensitivity of the detections. The unique capability of the third group, photonic crystal fiber SPR sensors, in providing greatly improved sensitivity, generated a vast field of researches and applications in biosensing devices.

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A Bimetallic-Coated, Low Propagation Loss, Photonic Crystal Fiber Based Plasmonic Refractive Index Sensor

Cited by 65 publications

References 32 publications

Highly Sensitive Graphene-Au Coated Plasmon Resonance PCF Sensor

Highly Sensitive Graphene-Au Coated Plasmon Resonance PCF Sensor

Sensitivity Enhancement of Modified D-Shaped Microchannel PCF-Based Surface Plasmon Resonance Sensor

Principles and Applications of Nanoplasmonics in Biological and Chemical Sensing: A Review

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