High-performance tapered fiber surface plasmon resonance sensor based on graphene/Ag/TiO2 layer

High-performance tapered fiber surface plasmon resonance sensor based on graphene/Ag/TiO2 layer | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article High-performance tapered fiber surface plasmon resonance sensor based on graphene/Ag/TiO 2 layer Dan Wang, Wei Li, Qingrong Zhang, Benquan Liang, Zhenkai Peng, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-344763/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract In this paper, a highly sensitive surface plasmon resonance sensor is proposed on the basis of a miniature tapered single-mode fiber. The sensing area of the tapered fiber is coated with graphene, silver and titanium dioxide layer. The graphene layer is used to increase the light absorption rate, and the titanium dioxide layer is used to protect the silver layer from oxidation and improve the sensor sensitivity due to its high dielectric constant. And optimizing the thickness of graphene, silver and titanium dioxide layer. According to the simulation calculation results, when the graphene is 15 layers, the silver layer is 40 nm, and the titanium dioxide is 20 nm, high-performance SPR can be obtained. The sensor has a detection range of 1.32–1.38, and its sensitivity can reach 8750 nm/RIU when the external refractive index is 1.38. The research results have potential application value for the design of high-performance SPR sensors. Electronic Materials and Devices Optical Materials and Devices Surface plasmon resonance Micro-fiber Graphene/Ag/TiO2 Sensor Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Full Text Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-344763","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":18288336,"identity":"7671a4e7-4da9-4d78-8e29-a9ab1ff8c3c9","order_by":0,"name":"Dan Wang","email":"","orcid":"","institution":"NJUPT","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Dan","middleName":"","lastName":"Wang","suffix":""},{"id":18288337,"identity":"7315b934-1681-4356-a66a-b90ef30708c3","order_by":1,"name":"Wei 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structure diagram and cross-sectional view of the sensing area.","description":"","filename":"ScreenShot20210325at4.19.56PM.png","url":"https://assets-eu.researchsquare.com/files/rs-344763/v1/10829e99b3194e6d9421d1c1.png"},{"id":7401132,"identity":"40cc37b5-9ca2-4d9e-ba56-49224593407d","added_by":"auto","created_at":"2021-03-26 21:51:30","extension":"png","order_by":2,"title":"Figure 2","display":"","copyAsset":false,"role":"figure","size":105604,"visible":true,"origin":"","legend":"(a)z=0 electric field intensity distribution diagram in cross section.\n(b) one-dimensional amplitude distribution diagram in cross section.\n","description":"","filename":"ScreenShot20210325at4.20.00PM.png","url":"https://assets-eu.researchsquare.com/files/rs-344763/v1/5f97fc365e597fbb516f1f38.png"},{"id":7400621,"identity":"1b84d974-3c83-4e1a-a06e-e1032bc73207","added_by":"auto","created_at":"2021-03-26 21:45:30","extension":"png","order_by":3,"title":"Figure 3","display":"","copyAsset":false,"role":"figure","size":53017,"visible":true,"origin":"","legend":"Transmittance spectra of sensors with different silver thickness.","description":"","filename":"ScreenShot20210325at4.20.06PM.png","url":"https://assets-eu.researchsquare.com/files/rs-344763/v1/204a9d9c9e1a5733b1548838.png"},{"id":7400617,"identity":"0c674a8f-c85f-481d-9118-eddb6c79e49d","added_by":"auto","created_at":"2021-03-26 21:45:30","extension":"png","order_by":4,"title":"Figure 4","display":"","copyAsset":false,"role":"figure","size":77194,"visible":true,"origin":"","legend":"(a) When the silver film thickness is 40 nm, the spectrum of the sensor (b)When the silver film thickness is 40 nm, the sensitivity of the 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6","display":"","copyAsset":false,"role":"figure","size":142979,"visible":true,"origin":"","legend":"SPR transmission spectra under different TiO2 thicknesses, RI=1.37 \n(a)0-25 nm (b)20 nm (c)25 nm.\n","description":"","filename":"ScreenShot20210325at4.20.29PM.png","url":"https://assets-eu.researchsquare.com/files/rs-344763/v1/5ccd5c3f8bf6f7aeeeb57c6a.png"},{"id":7400624,"identity":"060494c4-102c-4561-9f33-e83f2d5c3266","added_by":"auto","created_at":"2021-03-26 21:45:30","extension":"png","order_by":7,"title":"Figure 7","display":"","copyAsset":false,"role":"figure","size":86331,"visible":true,"origin":"","legend":"The relationship between resonant peak and analyte refractive index under different TiO2 thickness.","description":"","filename":"ScreenShot20210325at4.20.34PM.png","url":"https://assets-eu.researchsquare.com/files/rs-344763/v1/353c6ef47dfb2fcd44149f86.png"},{"id":7401133,"identity":"826c68fc-1d3e-4578-be39-286b5e52318e","added_by":"auto","created_at":"2021-03-26 21:51:30","extension":"png","order_by":8,"title":"Figure 8","display":"","copyAsset":false,"role":"figure","size":87493,"visible":true,"origin":"","legend":"The relationship between sensitivity and refractive index of analyte under different TiO2 layer thickness.","description":"","filename":"ScreenShot20210325at4.20.39PM.png","url":"https://assets-eu.researchsquare.com/files/rs-344763/v1/59ab7736b9570c44c8394ac1.png"},{"id":7400847,"identity":"36603c61-8831-40c7-a34e-0b1de6a8af96","added_by":"auto","created_at":"2021-03-26 21:48:30","extension":"png","order_by":9,"title":"Figure 9","display":"","copyAsset":false,"role":"figure","size":116947,"visible":true,"origin":"","legend":"SPR resonance spectrum (a)40 nm Ag (b)15-layer graphene/40 nm Ag (c)40 nm Ag/20 nm TiO2 (d)15-layer graphene/40 nm Ag/20 nm TiO2.","description":"","filename":"ScreenShot20210325at4.20.46PM.png","url":"https://assets-eu.researchsquare.com/files/rs-344763/v1/088ffe85e004dbb19f66531b.png"},{"id":7401135,"identity":"22bf05b7-f5e7-4c70-a1db-41103d991f39","added_by":"auto","created_at":"2021-03-26 21:51:30","extension":"png","order_by":10,"title":"Figure 10","display":"","copyAsset":false,"role":"figure","size":179846,"visible":true,"origin":"","legend":"RI=1.32, electric field intensity and amplitude distribution diagram in cross section (a)40 nm Ag (b)15-layer graphene/40 nm Ag (c)15-layer graphene/40 nm Ag/20 nm TiO2.","description":"","filename":"ScreenShot20210325at4.20.53PM.png","url":"https://assets-eu.researchsquare.com/files/rs-344763/v1/f43cdbe73872854b999be7ca.png"},{"id":7400623,"identity":"b827141a-62f4-406a-93a5-39d715dc2499","added_by":"auto","created_at":"2021-03-26 21:45:30","extension":"png","order_by":11,"title":"Figure 11","display":"","copyAsset":false,"role":"figure","size":219970,"visible":true,"origin":"","legend":"The electric field intensity distribution diagram of the tapered fiber SPR sensor with 15-layer graphene/40 nm Ag/20 nm TiO2 structure under different analyte refractive index.","description":"","filename":"ScreenShot20210325at4.21.01PM.png","url":"https://assets-eu.researchsquare.com/files/rs-344763/v1/17257819a157fcff5990cced.png"},{"id":13613441,"identity":"f3984c57-c828-4257-bd26-f7b771cacc54","added_by":"auto","created_at":"2021-09-17 06:37:03","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":2679488,"visible":true,"origin":"","legend":"","description":"","filename":"0318.pdf","url":"https://assets-eu.researchsquare.com/files/rs-344763/v1_covered.pdf"},{"id":7401728,"identity":"1e022df6-442d-4c37-bebe-d44d11572e12","added_by":"auto","created_at":"2021-03-26 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The sensing area of the tapered fiber is coated with graphene, silver and titanium dioxide layer. The graphene layer is used to increase the light absorption rate, and the titanium dioxide layer is used to protect the silver layer from oxidation and improve the sensor sensitivity due to its high dielectric constant. And optimizing the thickness of graphene, silver and titanium dioxide layer. According to the simulation calculation results, when the graphene is 15 layers, the silver layer is 40 nm, and the titanium dioxide is 20 nm, high-performance SPR can be obtained. The sensor has a detection range of 1.32\u0026ndash;1.38, and its sensitivity can reach 8750 nm/RIU when the external refractive index is 1.38. 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