Qingcheng You, Yi Zhou, Yukun Zhu, Licui Ji, Yichen Li, Bin Li, Xu Gao, Xing Wang, Honggang Pan
{"title":"基于掺锗SiO2 d型PCF的高灵敏度SPR折射率传感器","authors":"Qingcheng You, Yi Zhou, Yukun Zhu, Licui Ji, Yichen Li, Bin Li, Xu Gao, Xing Wang, Honggang Pan","doi":"10.1007/s11468-025-03101-5","DOIUrl":null,"url":null,"abstract":"<div><p>In this study, a D-shaped photonic crystal fiber (PCF) sensor with surface plasmon resonance (SPR) was designed with Ge-doped Si as the fiber core. The surface plasmon wave was excited by gold plating on the D-shaped surface. Numerical simulations by the finite element method (FEM) show that this sensor can realize a wide detection range of refractive index (RI) measurement from 1.330 to 1.445. The maximum wavelength sensitivity (WS) is 45,600 nm/RIU, and the maximum accuracy is 2.19 × 10<sup>−6</sup> RIU. Compared with the sensor with a pure SiO<sub>2</sub> fiber core, the maximum WS is increased by about 2.87 times, and the average WS is increased by 20.6%. The proposed sensor is characterized by a simple structure, high sensitivity, and a large detection range, which has great potential in cell activity monitoring, food additives, and residue detection.</p></div>","PeriodicalId":736,"journal":{"name":"Plasmonics","volume":"20 8","pages":"6095 - 6104"},"PeriodicalIF":4.3000,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"High Sensitivity SPR Refractive Index Sensor Based on D-shaped PCF with Ge-doped SiO2 Core\",\"authors\":\"Qingcheng You, Yi Zhou, Yukun Zhu, Licui Ji, Yichen Li, Bin Li, Xu Gao, Xing Wang, Honggang Pan\",\"doi\":\"10.1007/s11468-025-03101-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In this study, a D-shaped photonic crystal fiber (PCF) sensor with surface plasmon resonance (SPR) was designed with Ge-doped Si as the fiber core. The surface plasmon wave was excited by gold plating on the D-shaped surface. Numerical simulations by the finite element method (FEM) show that this sensor can realize a wide detection range of refractive index (RI) measurement from 1.330 to 1.445. The maximum wavelength sensitivity (WS) is 45,600 nm/RIU, and the maximum accuracy is 2.19 × 10<sup>−6</sup> RIU. Compared with the sensor with a pure SiO<sub>2</sub> fiber core, the maximum WS is increased by about 2.87 times, and the average WS is increased by 20.6%. The proposed sensor is characterized by a simple structure, high sensitivity, and a large detection range, which has great potential in cell activity monitoring, food additives, and residue detection.</p></div>\",\"PeriodicalId\":736,\"journal\":{\"name\":\"Plasmonics\",\"volume\":\"20 8\",\"pages\":\"6095 - 6104\"},\"PeriodicalIF\":4.3000,\"publicationDate\":\"2025-06-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Plasmonics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11468-025-03101-5\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plasmonics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s11468-025-03101-5","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
High Sensitivity SPR Refractive Index Sensor Based on D-shaped PCF with Ge-doped SiO2 Core
In this study, a D-shaped photonic crystal fiber (PCF) sensor with surface plasmon resonance (SPR) was designed with Ge-doped Si as the fiber core. The surface plasmon wave was excited by gold plating on the D-shaped surface. Numerical simulations by the finite element method (FEM) show that this sensor can realize a wide detection range of refractive index (RI) measurement from 1.330 to 1.445. The maximum wavelength sensitivity (WS) is 45,600 nm/RIU, and the maximum accuracy is 2.19 × 10−6 RIU. Compared with the sensor with a pure SiO2 fiber core, the maximum WS is increased by about 2.87 times, and the average WS is increased by 20.6%. The proposed sensor is characterized by a simple structure, high sensitivity, and a large detection range, which has great potential in cell activity monitoring, food additives, and residue detection.
期刊介绍：
Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons.
Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.
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