GeO2 Doped Optical Fiber Plasmonic Sensor for Refractive Index Detection

Gangwar, Rahul Kumar; Min, Rui; Kumar, Santosh; Li, Xiaoli

doi:10.3389/fphy.2021.707113

Cited by 18 publications

(5 citation statements)

References 32 publications

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“…Finally, figure of merit (FOM) factor of the designed sensor is obtained from the following equation [40]:…”

Section: Methods and Device Structurementioning

confidence: 99%

Refractive Index Sensor Based on Surface Plasmon Resonance Excitation in a D-Shaped Optical Fiber Coated by Tantalum

Vayghan¹,

Eftekharinia²

2022

Plasmonics

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In this paper, a plasmonic refractive index sensor using a D-shaped optical fiber coated by tantalum has been proposed. The interaction between fiber fundamental mode and plasmonic mode which lead to the formation of resonance peaks depending on the analyte refractive index (RI) are investigated in detail. Using spectral sensitivity methods, the sensing performance of the proposed sensor for detecting analytes is numerically studied. The effect of various design parameters of proposed sensor are optimized numerically to achieve the maximum wavelength sensitivity. The proposed D-shaped optical fiber sensor has a RI detection range of 1.30 to 1.43 and exhibits a non-linear increasing spectral sensitivity from 1300 nm/RIU to 3900 nm/RIU. The proposed RI sensor is attractive for detecting different RI chemical and biochemical samples due to simple design, relatively large detection range, cost-effective, non-toxic nature and highly corrosion resistivity plasmonic material.

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“…Finally, figure of merit (FOM) factor of the designed sensor is obtained from the following equation [40]:…”

Section: Methods and Device Structurementioning

confidence: 99%

Refractive Index Sensor Based on Surface Plasmon Resonance Excitation in a D-Shaped Optical Fiber Coated by Tantalum

Vayghan¹,

Eftekharinia²

2022

Plasmonics

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“…While increasing the dopant concentration slightly reduces sensitivity, the sensor's adaptable design and extended detection range offer promising applications for diverse analyte detection in practical sensing environments. Gangwar et al [133] demonstrated in Figure 4(b) a Dshaped optical fiber SPR sensor where a gold film is positioned at the flat portion of the fiber and GeO 2 is doped into the silica core. Through FEM analysis, sensing properties are explored, achieving a maximum sensitivity of 20863.20 nm/RIU, resolution of 4.79×10 À 6 RIU, and figure of merit of 308.38 RIU À 1 for an RI of 1.43.…”

Section: Germaniummentioning

confidence: 99%

“…The fiber core, with an RI, denoted as n co , comprises GeO 2 doped silica, facilitating light propagation within the core. The cladding, on the other hand, is made of fused silica [133] (CreativeCommonsLicense4.0., with permission from Springer).…”

Section: Plasmonic Materialsmentioning

confidence: 99%

Advances in Plasmonic Photonic Crystal Fiber Biosensors: Exploring Innovative Materials for Bioimaging and Environmental Monitoring

Vatani,

Biney,

Faramarzi

et al. 2024

ChemistrySelect

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This review paper comprehensively analyzes recent advancements in optical fiber‐based biosensors, focusing on conventional fiber and photonic crystal structures. This paper overviews the significant applications of optical fiber biosensors, including bioimaging, quality analysis, food safety, and field environment monitoring, setting the stage for subsequent discussions. The primary objective of the review is to systematically evaluate recent literature concerning optical fiber‐based biosensors, emphasizing their sensitivities and resolutions. The second section explores integrating plasmonic materials such as graphene, TDMC, germanium, black phosphorus, and silicon within optical fiber biosensors, elucidating their roles in enhancing sensitivity and resolution in biosensing applications. A detailed examination of photonic crystal fibers (PCF) follows, categorizing them into internally and externally metal film‐coated biosensors, highlighting their distinct advantages and limitations. Comparative analyses in two tables delineate the performance and sensitivity of optical fiber‐based biosensors, mainly focusing on different coating strategies. The final section of the review discusses emerging trends and applications in optical fiber biosensing technologies, underscoring their potential to transform biomedical and environmental monitoring fields. By synthesizing recent developments and challenges, this review aims to offer researchers and practitioners a comprehensive understanding of optical fiber‐based biosensors, facilitating informed decision‐making and driving further advancements in the field.

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“…Microchannel plasmon biosensors Photonic crystal fiber D-shaped photonic crystal fiber (PCF) sensor for malaria diagnosis. [95] MXenes-based biosensors Fiber optic SPR sensor A spectral SPR-based fiber optic to diagnose colorectal cancer. [96] Au nanowire-based biosensors Optics Embedded micro-drilled dual-channel approach [97] Au Nanowire-based biosensors Optical Fiber Refractive Index Concave-shaped refractive index sensor (CSRIS) exploiting localized surface plasmon resonance (LSPR).…”

Section: Plasmonic Biosensors Surface Plasmon Resonance (Spr)mentioning

confidence: 99%

Biosensors and Microfluidic Biosensors: From Fabrication to Application

2022

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Biosensors are ubiquitous in a variety of disciplines, such as biochemical, electrochemical, agricultural, and biomedical areas. They can integrate various point-of-care applications, such as in the food, healthcare, environmental monitoring, water quality, forensics, drug development, and biological domains. Multiple strategies have been employed to develop and fabricate miniaturized biosensors, including design, optimization, characterization, and testing. In view of their interactions with high-affinity biomolecules, they find application in the sensitive detection of analytes, even in small sample volumes. Among the many developed techniques, microfluidics have been widely explored; these use fluid mechanics to operate miniaturized biosensors. The currently used commercial devices are bulky, slow in operation, expensive, and require human intervention; thus, it is difficult to automate, integrate, and miniaturize the existing conventional devices for multi-faceted applications. Microfluidic biosensors have the advantages of mobility, operational transparency, controllability, and stability with a small reaction volume for sensing. This review addresses biosensor technologies, including the design, classification, advances, and challenges in microfluidic-based biosensors. The value chain for developing miniaturized microfluidic-based biosensor devices is critically discussed, including fabrication and other associated protocols for application in various point-of-care testing applications.

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GeO2 Doped Optical Fiber Plasmonic Sensor for Refractive Index Detection

Cited by 18 publications

References 32 publications

Refractive Index Sensor Based on Surface Plasmon Resonance Excitation in a D-Shaped Optical Fiber Coated by Tantalum

Refractive Index Sensor Based on Surface Plasmon Resonance Excitation in a D-Shaped Optical Fiber Coated by Tantalum

Advances in Plasmonic Photonic Crystal Fiber Biosensors: Exploring Innovative Materials for Bioimaging and Environmental Monitoring

Biosensors and Microfluidic Biosensors: From Fabrication to Application

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