scholarly journals Performance Analysis of a Kretschmann-Based Ag-ITO-Au Surface Plasmon Resonance Sensor through Numerical Simulations

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Liang Zhang ◽  
Jian’an He ◽  
Tao Li ◽  
Xiaocong Wu ◽  
Dayong Gu ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Numerical Simulations ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Indium Tin Oxide ◽  
Enhancement Effect ◽  
Sensor Performance ◽  
Sensor Structure ◽  
Resonance Sensor ◽  
20 Nm

Variations of a Kretschmann-structure-based Ag-indium tin oxide- (ITO-) Au surface plasmon resonance (SPR) sensor were explored to improve its sensitivity. The sensor structure was optimised, and its characteristics were studied through numerical simulations. The chip structure that comprised 20 nm Ag/30 nm ITO/10 nm Au yielded the best sensing performance, wherein the angular sensitivity could reach 197.6° RIU−1 and the figure of merit was 43.4 RIU−1. These performance parameters are nearly three times higher than those of Ag/Au bimetallic resonance sensors. Furthermore, an adhesive Cr layer and two-dimensional graphene were incorporated into this sensor structure to explore their impact on the performance. The results demonstrated that the Cr layer significantly weakened the sensor performance, whereas graphene did not produce the expected enhancement effect on this structure. If simply adding a layer to a Au/Ag sensor can produce a three-fold improvement in its performance, then its economic and scientific benefits are potentially significant and widespread.

Improving surface plasmon resonance sensor performance using critical-angle compensation

1999 ◽  
Author(s):  
Timothy M. Chinowsky ◽  
Anita A. Strong ◽  
Dwight U. Bartholomew ◽  
Scott Jorgensen-Soelberg ◽  
Thomas Notides ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Critical Angle ◽  
Surface Plasmon Resonance Sensor ◽  
Sensor Performance ◽  
Resonance Sensor

Numerical Investigation of the Microstructured Optical Fiber-Based Surface Plasmon Resonance Sensor with Silver Nanolayer

2013 ◽  
Vol 411-414 ◽  
pp. 1573-1576 ◽  
Author(s):  
Nan Nan Luan ◽  
Jian Quan Yao ◽  
Ran Wang ◽  
Cong Jing Hao ◽  
Bao Qun Wu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Optical Fiber ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Silver Layer ◽  
Spr Sensor ◽  
Microstructured Optical Fiber ◽  
Sensor Structure ◽  
Resonance Sensor

The surface plasmon resonance (SPR) sensor is proposed based on coating the inner surfaces of an index-guiding microstructured optical fiber (MOF) with a silver layer. Fiber core is surrounded by six large metallized holes which should facilitate the fabrication of the layered sensor structure and the infiltration of the analyte. The relationship between the sensitivity of SPR sensor and the refractive index of MOF material is demonstrated with finite element method (FEM). Numerical simulation results indicate that the sensitivity of SPR sensor decreases as the refractive index of the MOF material increasing and both spectral and intensity sensitivity are estimated to be 6.25×10-5and 6.67×10-5with low refractive index of MOF materialn=1.46.

scholarly journals Design and Performance of a Composite Grating-Coupled Surface Plasmon Resonance Trace Liquid Concentration Sensor

Sensors ◽  
2019 ◽  
Vol 19 (24) ◽  
pp. 5502
Author(s):  
Wenchao Li ◽  
Zhiquan Li ◽  
Jiahuan He ◽  
Liyang Chu
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Ethylene Glycol ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Indium Tin Oxide ◽  
Reference Value ◽  
Sensor Structure ◽  
Fluid Concentration ◽  
And Performance

In this paper, a grating-coupled surface plasmon resonance concentration sensor employing a gold and indium tin oxide (Au/ITO) nanoparticle composite instead of metal is proposed. The structure and material parameters of the sensor are discussed and analyzed. Taking the ethylene glycol concentration as an example, the influence of the nanocomposite on the wave vector matching, the influence of the refractive index of the medium to be tested and the influence of the concentration on the refractive index were analyzed in detail. The experimental results show that when the sensor is used for the measurement of ethylene glycol concentration, the correlation coefficient between the concentration and the refractive index is as high as 0.999995. The fitting curve and data correlation are good, and the sensitivity has a good linear relationship with the sensitivity. Therefore, the sensor structure proposed in this paper can be used to accurately measure the trace concentration of liquid, and its sensing mode has certain reference value for the measurement of general trace fluid concentration.

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