Fiber Optic SPR Sensing Enhancement in NIR via Optimum Radiation Damping Catalyzed by 2D Materials

Fiber optic surface plasmon resonance (FOSPR) sensor with samarium-doped chalcogenide core, polymer clad, Ag layer, and 2D material (graphene and MoS 2 ) monolayer is studied in near-infrared seeking sensitive and accurate determination of malignancies in human liver tissues. The analysis shows that...

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Bibliographic Details
Published in:IEEE photonics technology letters Vol. 30; no. 23; pp. 2021 - 2024
Main Authors: Sharma, Anuj K., Kaur, Baljinder
Format: Journal Article
Language:English
Published: New York IEEE 01.12.2018
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
2D material
Biosensors
Damping
Fiber optics
Figure of merit
Graphene
Liver
Molybdenum
Molybdenum disulfide
Optical fiber
Optical fiber sensors
Optical fibers
plasmon
radiation damping
Rayleigh scattering
Samarium
sensor
Sensors
Silver
Sulfur
Thickness
Two dimensional displays
Two dimensional materials
ISSN:1041-1135, 1941-0174
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Summary:Fiber optic surface plasmon resonance (FOSPR) sensor with samarium-doped chalcogenide core, polymer clad, Ag layer, and 2D material (graphene and MoS 2 ) monolayer is studied in near-infrared seeking sensitive and accurate determination of malignancies in human liver tissues. The analysis shows that the presence of 2D material significantly catalyzes the optimum radiation damping (ORD) in the FOSPR structure, causing massive increase in its figure of merit (FOM). At ORD, i.e., 803.9-nm wavelength (<inline-formula> <tex-math notation="LaTeX">\lambda </tex-math></inline-formula>) and 35.7-nm Ag layer thickness (<inline-formula> <tex-math notation="LaTeX">d_{m} </tex-math></inline-formula>), the FOM of graphene-based FOSPR sensor races to 6904.012 RIU −1 . Similarly, at <inline-formula> <tex-math notation="LaTeX">\lambda = 1099.35 </tex-math></inline-formula> nm and <inline-formula> <tex-math notation="LaTeX">d_{m} = 29.8 </tex-math></inline-formula> nm, MoS 2 -based FOSPR sensor's FOM shoots to 5897.082 RIU −1 . The comparison reveals that the above FOM values are way better than for the existing FOSPR sensors. For biosensing, MoS 2 -based FOSPR sensor should be used, as its longer ORD wavelength (1099.35 nm) leads to reduced Rayleigh scattering and lesser photodamage of tissue. For other sensing applications, graphene-based FOSPR sensor at its ORD condition can be used.
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ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2018.2874700