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

In this paper, a low-loss, spiral lattice photonic crystal fiber (PCF)-based plasmonic biosensor is proposed for its application in detecting various biomolecules (i.e., sugar, protein, DNA, and mRNA) and biochemicals (i.e., serum and urine). Plasmonic material gold (Au) is employed externally to efficiently generate surface plasmon resonance (SPR) in the outer surface of the PCF. A thin layer of titanium oxide (TiO2) is also introduced, which assists in adhering the Au layer to the silica fiber. The sensing performance is investigated using a mode solver based on the finite element method (FEM). Simulation results show a maximum wavelength sensitivity of 23,000 nm/RIU for a bio-samples refractive index (RI) detection range of 1.32–1.40. This sensor also exhibits a very low confinement loss of 0.22 and 2.87 dB/cm for the analyte at 1.32 and 1.40 RI, respectively. Because of the ultra-low propagation loss, the proposed sensor can be fabricated within several centimeters, which reduces the complexity related to splicing, and so on.

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Photonic crystal fiber refractive index sensor with ultra-wide detection range based on surface plasmon resonance

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XX ◽

10.1117/12.2544136 ◽

2020 ◽

Author(s):

Guangyao Wang ◽

Ying Lu ◽

Liangcheng Duan ◽

Jianquan Yao

Keyword(s):

Refractive Index ◽

Surface Plasmon Resonance ◽

Photonic Crystal ◽

Photonic Crystal Fiber ◽

Surface Plasmon ◽

Plasmon Resonance ◽

Refractive Index Sensor ◽

Detection Range ◽

Crystal Fiber

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High Sensitivity of Surface Plasmon Enhanced Refractive Index Sensor Based on Tunable Liquid Core Photonic Crystal Fiber Covered with Four Gold-Films

10.21203/rs.3.rs-605707/v1 ◽

2021 ◽

Author(s):

Zhenkai Fan ◽

Jianye Qin ◽

Shichao Chu ◽

Junling Gao

Keyword(s):

Refractive Index ◽

Photonic Crystal ◽

Photonic Crystal Fiber ◽

Surface Plasmon ◽

Near Infrared ◽

Liquid Core ◽

High Sensitivity ◽

Confinement Loss ◽

Refractive Index Sensor ◽

Crystal Fiber

Abstract A high sensitivity near-infrared photonic crystal fiber (PCF) refractive index sensor based on surface plasmon resonance (SPR) is proposed in this paper. The sensing performance of the PCF refractive index sensor is calculated and analyzed by using the finite element method (FEM). The coated metal material selects for chemically stable gold, which is used to induce SPR. The resonant coupling will occurs when the phase matching condition is met between the surface plasmon polariton (SPP) mode and the fundamental mode. The influence of the diameter of the central hole and the thickness of the gold film on the resonance wavelength and the confinement loss was studied. Numerical results demonstrate that the average sensitivity of the sensor can reach to 3200nm/RIU, which can be used in the field of refractive index detecting.

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Multi-Core Surface Plasmon Resonance Refractive Index Sensor on Photonic Crystal Fiber

International Journal for Research in Applied Science and Engineering Technology ◽

10.22214/ijraset.2021.35163 ◽

2021 ◽

Vol 9 (VI) ◽

pp. 1278-1283

Author(s):

Harshit Bhargava

Keyword(s):

Refractive Index ◽

Surface Plasmon Resonance ◽

Photonic Crystal ◽

Photonic Crystal Fiber ◽

Surface Plasmon ◽

Plasmon Resonance ◽

Research Work ◽

Refractive Index Sensor ◽

Plasmonic Material ◽

Crystal Fiber

In this research work, low refractive index (RI) detection done on multi-core photonic crystal fiber (PCF) based highly sensitive surface plasmon resonance (SPR) sensor is propounded. Sensing the changes in neighboring medium’s refractive index is done by placing the plasmonic material i.e. Silver (Ag) over the crystal structure of fiber. On top of the Silver, a threadlike film of titanium dioxide (TiO2) is deposited to prevent oxidation of plasmonic material silver. Peak wavelength sensitivity thus achieved by this sensor is 127,600 nm/RIU and similarly, peak amplitude sensitivity achieved is 2561 RIU-1, respectively. Subsequently making this sensor suitable candidate for various applications such as biosensing, sensing organic compounds and chemicals, inspecting pharmaceuticals and other detections.

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Square array photonic crystal fiber-based surface plasmon resonance refractive index sensor

Modern Physics Letters B ◽

10.1142/s0217984917503523 ◽

2017 ◽

Vol 31 (36) ◽

pp. 1750352 ◽

Cited By ~ 12

Author(s):

Min Liu ◽

Xu Yang ◽

Bingyue Zhao ◽

Jingyun Hou ◽

Ping Shum

Keyword(s):

Refractive Index ◽

Surface Plasmon Resonance ◽

Photonic Crystal ◽

Photonic Crystal Fiber ◽

Surface Plasmon ◽

Plasmon Resonance ◽

Refractive Index Sensor ◽

Plasmonic Material ◽

Crystal Fiber ◽

Square Array

Based on surface plasmon resonance (SPR), a novel refractive index (RI) sensor comprising a square photonic crystal fiber (PCF) is proposed to realize the detection of the annular analyte. Instead of hexagon structure, four large air-holes in a square array are introduced to enhance the sensitivity by allowing two polarization directions of the core mode to be more sensitive. The gold is used as the only plasmonic material. The design purpose is to reduce the difficulty in gold deposition and enhance the RI sensitivity. The guiding properties and the effects of the parameters on the performance of the sensor are numerically investigated by the Finite Element Method (FEM). By optimizing the structure, the sensor can exhibit remarkable sensitivity up to 7250 nm/RIU and resolution of [Formula: see text] RIU with only one plasmonic material, which is very competitive compared with the other reported externally coated and single-layer coated PCF-based SPR (PCF–SPR) sensors, to our best knowledge.

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