A Surface Plasmon Resonance Sensor Based on Biplanar Waveguide Coupling

A surface plasmon and resonant sensor technology, which is applied in the field of light sensing, can solve the problems of high loss, Q factor and low sensitivity of SPR sensors, and achieve wide detection range of sensing refractive index, fast real-time detection speed and process flow. uncomplicated effect

Active Publication Date: 2022-03-04
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Application Information

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Problems solved by technology

[0003] Traditional SPR sensors have disadvantages such as high loss, low Q factor and low sensitivity

Method used

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  • A Surface Plasmon Resonance Sensor Based on Biplanar Waveguide Coupling
  • A Surface Plasmon Resonance Sensor Based on Biplanar Waveguide Coupling
  • A Surface Plasmon Resonance Sensor Based on Biplanar Waveguide Coupling

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Embodiment 1

[0033] like figure 1 As shown, a SPR resonant sensor based on biplanar waveguide coupling, from top to bottom is SF11 prism, gold, fluoropolymer, zirconia, sensing layer, zirconia and fluoropolymer, the most The thickness of the upper layer and the lowermost layer can be regarded as semi-infinite thickness, and the thicknesses of the middle layers from top to bottom are respectively set to 48, 895, 110, 371, and 115 nm. The upper Cytop, ZrO2 and sensing layer constitute the first planar dielectric waveguide (referred to as PWG1), and the sensing layer and the Cytop and ZrO2 below constitute the second planar dielectric waveguide (referred to as PWG2). The sensing analyte is delivered through the pipeline.

[0034] When a beam of TM polarized light with a wavelength of 633nm enters the prism and enters the medium through the Au film, a surface plasmon polariton (SPP) mode is generated at the interface between the gold layer and the medium, and its effective refractive index is...

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Abstract

A surface plasmon resonance sensor based on dual planar waveguide coupling, comprising a prism, a gold layer or a silver layer, a first planar dielectric waveguide, and a second planar dielectric waveguide arranged in sequence; the first planar dielectric waveguide includes an upper layer arranged in sequence A fluoropolymer layer, an upper zirconium dioxide layer and a sensing layer, the second planar dielectric waveguide includes a sensing layer, a lower zirconium dioxide layer and a lower fluoropolymer layer arranged in sequence, the first planar dielectric waveguide and the second planar dielectric waveguide The planar dielectric waveguide shares the sensing layer, and the sensing layer is provided with channels for the liquid to be measured or the gas to be measured. In addition to inheriting the advantages of the traditional SPR sensor, such as sample-free and real-time dynamic detection, the invention has the outstanding advantages of low loss, high imaging sensitivity and Q factor due to the occurrence of the Fano effect.

Description

technical field [0001] The invention relates to the field of optical sensing technology, in particular to a surface plasmon resonance sensor based on biplane waveguide coupling. Background technique [0002] Surface plasmon resonance (SPR) is a collective oscillation formed by the coupling of free electrons bound at the metal-dielectric interface and electromagnetic waves. The change of the refractive index of liquid or gas can be monitored in real time by using SPR-based biosensing technology. SPR sensing analysis can be used for the analysis and characterization of toxic gases, chemical biomolecules and living cells due to its advantages of more accurate detection ability, label-free analysis and small sample requirement. [0003] Traditional SPR sensors have disadvantages such as high loss, low Q factor and low sensitivity. For example: [1] X.C.Yuan, B.H.Ong, Y.G.Tan, D.W.Zhang, R.Irawan, S.C.Tjin, J OptAPureAppl Opt 8(12) 959 (2006); [2] G.Zheng, J.Cong, L.Xu , J.Wang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/552
CPCG01N21/554
Inventor 贺梦冬鲁登云赵凯王凯军张新民李建波
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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