基于氧化铟锡的十重偏芯D型光子准晶光纤的高灵敏度表面等离子体共振传感器 -

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基于氧化铟锡的十重偏芯D型光子准晶光纤的高灵敏度表面等离子体共振传感器

刘强^1,,
蒋宇¹,
胡春杰²,
卢文姝¹,
孙宇丹¹,
刘超^1,,,
吕靖薇¹,
赵锦¹,
邰胜男¹,
易早³,
PaulK Chu⁴

1.
东北石油大学物理与电子工程学院，黑龙江大庆 163318
2.
哈尔滨医科大学第四附属医院妇产科，黑龙江哈尔滨 150001
3.
西南科技大学极端条件物质特性联合实验室，四川绵阳 621010
4.
香港城市大学物理系，香港九龙 999077

中图分类号:O433
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出版历程
- 收稿日期:2021-07-06
- 修回日期:2021-07-20
- 网络出版日期:2021-09-10
- 刊出日期:2022-01-19

High-sensitivity surface plasmon resonance sensor based on the ten-fold eccentric core quasi-D-shaped photonic quasi-crystal fiber coated with indium tin oxide

doi:10.37188/CO.EN.2021-0006

1.
School of Physics and Electronic Engineering, Northeast Petroleum University, Daqing 163318, China
2.
Department of Gynaecology and Obstetrics, The Fourth Affiliated Hospital of Harbin Medical University, Harbin 150001, China
3.
Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China
4.
Department of Physics, City University of Hong Kong, Hong Kong 999077, China

Funds:Supported by Heilongjiang Provincial talent project (No. ts26180221); Youth Science Foundation of Northeast Petroleum University (No. 2019QNL-17); Natural Science Foundation of Heilongjiang Province (No. E2017010); the City University of Hong Kong Strategic Research Grant (SRG) (No. 7005105, No. 7005265); Scientific Research Fund of Sichuan Province Science and Technology Department (No. 2020YJ0137); Local Universities Reformation and Development Personnel Training Supporting Project from Central Authorities (No. 140119001)

More Information

Author Bio:
Liu Qiang (1980—), Male, born in Tailai, Heilongjiang, Ph.D, Professor, graduated from Harbin Engineering University in 2012, and is mainly engaged in optical fiber sensing technology. E-mail:nepulq@126.com
Liu Chao (1978—), Male, born in Mulan, Heilongjiang, Ph.D, Professor, doctoral supervisor, graduated from Harbin Institute of Technology in 2008, and is mainly engaged in micro-structured optical devices. E-mail: msm-liu@126.com

Corresponding author:msm-liu@126.com

摘要

摘要:设计并分析了一种高灵敏度表面等离子体共振(SPR)传感器，该传感器由偏芯D型结构的十重光子准晶光纤(PQF)组成，并局部涂覆氧化铟锡(ITO)。偏芯D型结构可以使液体分析更加方便，增强了纤芯模与SPP模之间的耦合，提高了传感灵敏度。采用有限元法对传感器的特性进行研究。结果表明，传感器的波长灵敏度随折射率(RIs)的增大而增大，最大波长灵敏度和分辨率分别为60000 nm/RIU和1.67×10 ⁻⁶RIU。该传感器性能优良，在液体折射率测量方面具有很大的应用潜力。
- 表面等离子体共振/
- 光子准晶光纤/
- D型结构/
- 偏芯结构
Abstract:A high-sensitivity Surface Plasmon Resonance (SPR) sensor comprising of an eccentric core ten-fold Photonic Quasi-crystal Fiber (PQF) with a D-shaped structure and partially coated with Indium Tin Oxide (ITO) is designed and numerically analyzed. The eccentric core D-shaped structure makes the analysis of liquids more convenient and also strengthens the coupling between the core mode and Surface Plasmon Polariton (SPP) mode to improve the sensing sensitivity. The characteristics of the sensor are investigated by the Finite Element Method (FEM). The wavelength sensitivity increases with increasing Refractive Indexes (RIs) and the maximum wavelength sensitivity and resolution are 60000 nm/RIU and 1.67×10 ⁻⁶RIU, respectively. The sensor delivers excellent performance and has large potential applications in the measurement of liquid refractive indexes.
- surface plasmon resonance/
- photonic quasi-crystal fiber/
- D-shaped structure/
- eccentric core structure

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Figure 1.Schematic diagram of PQF-SPR sensor

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Figure 2.Loss spectra of the core modes and dispersion relation between theY-polarized core mode and SPP mode for a liquid analyte RI of 1.39

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Figure 3.Mode field diagrams for the analyte RI of 1.39. (a)Y-polarized core mode and (b)Y-polarized SPP mode

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Figure 4.(a) Loss spectra as the analyte RIs vary from 1.35 to 1.4; (b) the resonance wavelength and the wavelength sensitivity versus the refractive index of the analyte; (c) amplitude sensitivity curves of the sensor for analyte RIs between 1.35 and 1.395

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Figure 5.(a) Loss spectra of the samples with different ITO thicknesses and (b) wavelength sensitivity varying with ITO thickness

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Figure 6.(a) Loss spectra for different ITO lengths for refractive indexes of 1.395 and 1.4; (b) resonance wavelength varying with ITO length

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Figure 7.(a), (b) Loss spectra for different air hole spacing and analyte refractive indices of 1.395 and 1.4; (c) peak loss and resonant wavelength for differentΛwhenn_a=1.395 andn_a=1.4

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Figure 8.(a) Loss spectra for different air hole diametersd₁asn_a= 1.4; (b) loss spectra ford₁= 2.4 μm and 2.6 μm; (c)the effect ofd₂on the loss spectra forn_a=1.395 and 1.4

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Table 1.Sensing performance of the sensor for different analyte RIs

Analyte RI	Peak wavelength (nm)	Res. peak shift (nm)	Wavelength sensitivity (nm/RIU)	Amp. sens. (RIU⁻¹)	Wavelength resolution (RIU)	Amplitude resolution (RIU)
1.35	1760	30	6000	102.424	1.67×10⁻⁵	9.76×10⁻⁵
1.355	1790	30	6000	110.834	1.37×10⁻⁵	9.02×10⁻⁵
1.36	1820	40	8000	127.385	1.25×10⁻⁵	7.85×10⁻⁵
1.365	1860	50	10000	143.603	1.00×10⁻⁵	6.96×10⁻⁵
1.37	1910	50	10000	168.544	1.00×10⁻⁵	5.93×10⁻⁵
1.375	1960	60	12000	200.191	8.33×10⁻⁶	5.41×10⁻⁵
1.38	2020	80	16000	248.501	6.25×10⁻⁶	4.02×10⁻⁵
1.385	2100	100	20000	329.573	5.00×10⁻⁶	3.03×10⁻⁵
1.39	2200	150	30000	516.343	3.33×10⁻⁶	1.93×10⁻⁵
1.395	2350	300	60000	594.241	1.67×10⁻⁶	1.68×10⁻⁵
1.4	2650	N/A	N/A	N/A	N/A	N/A

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Table 2.Comparison of the performance of the sensor in this paper and those proposed in the recent literatures

Refs.	Structure	RI Range	Operation wave. range (nm)	Wave. res. (RIU)	Max. wave. sens. (nm/RIU)
[19]	D-shaped ITO-coated PQF	1.26~1.38	1380~2260	2.86×10⁻⁶RIU	35000 nm/RIU
[21]	D-shaped ITO-coated PCF	1.22~1.33	1200~2250	6.67×10⁻⁶RIU	15000 nm/RIU
[39]	Double groove with Ag and Au	1.22~1.36	1470~2154	8.68×10⁻⁶RIU	12400 nm/RIU
[34]	Eccentric core ITO-coated PQF	1.33~1.39	1480~2008	4.739×10⁻⁶RIU	21000 nm/RIU
[42]	Dual core ITO, graphene-coated	1.37~1.40	1570~1980	−	15000 nm/RIU
[41]	Arc groove PCF-SPR	1.22~1.37	1650~2730	1.96×10⁻⁶RIU	51000 nm/RIU
[40]	Graphene D-shaped PCF-SPR	1.33~1.38	1880~2140	9.35×10⁻⁶RIU	10694 nm/RIU
This work	D-shaped eccentric core PQF	1.35~1.40	1760~2650	1.67×10⁻⁶RIU	60000 nm/RIU

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