{"title":"金属-绝缘体-金属波导与半环形谐振器之间耦合的高灵敏度范诺谐振","authors":"Zeinelabedin A. Mohamed","doi":"10.1016/j.ijleo.2025.172530","DOIUrl":null,"url":null,"abstract":"<div><div>Fano resonance with asymmetric and sharp spectral features has recently been intriguing for refractive index sensing. In this study, we demonstrate a Fano resonance sensor that employs the coupling between a metal-insulator-metal (MIM) waveguide and a semi-ring resonator. The MIM waveguide has a three-ring resonator built in the center, and high-field confinement is observed due to the coupling of the two structures. The coupled structure's transmission spectrum exhibits three Fano resonance modes that are influenced by structure geometry and the surrounding medium's refractive index. The high-quality factor (<span><math><mrow><mi>Q</mi><mo>−</mo><mi>factor</mi></mrow></math></span>) of mode 3 indicates that this sensor is suitable for use in optical sensing applications. To achieve maximum sensing performance, the parameters of the proposed structure are manipulated and different sensing parameters are computed. The sensor's estimated sensitivity of 3164.97 nm/RIU is equivalent to that of other Fano resonance sensors. Additionally, for plasmonic MIM sensors, the developed sensor achieves high values of <span><math><mrow><mi>Q</mi><mo>−</mo><mi>factor</mi></mrow></math></span> and <span><math><mi>FOM</mi></math></span> of 5420.99 and 5641.57 <span><math><msup><mrow><mi>RIU</mi></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></math></span>, respectively. The proposed high-sensitivity sensor could be an attractive choice for sensing applications because of its straightforward design and ease of fabrication. Also, the combination of very high sensitivity and FOM in a tiny and compact configuration is ideal for on-chip plasmonic nanosensors.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"339 ","pages":"Article 172530"},"PeriodicalIF":3.1000,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Highly sensitive Fano resonance due to coupling between metal-insulator-metal waveguide and semi-ring resonators\",\"authors\":\"Zeinelabedin A. Mohamed\",\"doi\":\"10.1016/j.ijleo.2025.172530\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Fano resonance with asymmetric and sharp spectral features has recently been intriguing for refractive index sensing. In this study, we demonstrate a Fano resonance sensor that employs the coupling between a metal-insulator-metal (MIM) waveguide and a semi-ring resonator. The MIM waveguide has a three-ring resonator built in the center, and high-field confinement is observed due to the coupling of the two structures. The coupled structure's transmission spectrum exhibits three Fano resonance modes that are influenced by structure geometry and the surrounding medium's refractive index. The high-quality factor (<span><math><mrow><mi>Q</mi><mo>−</mo><mi>factor</mi></mrow></math></span>) of mode 3 indicates that this sensor is suitable for use in optical sensing applications. To achieve maximum sensing performance, the parameters of the proposed structure are manipulated and different sensing parameters are computed. The sensor's estimated sensitivity of 3164.97 nm/RIU is equivalent to that of other Fano resonance sensors. Additionally, for plasmonic MIM sensors, the developed sensor achieves high values of <span><math><mrow><mi>Q</mi><mo>−</mo><mi>factor</mi></mrow></math></span> and <span><math><mi>FOM</mi></math></span> of 5420.99 and 5641.57 <span><math><msup><mrow><mi>RIU</mi></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></math></span>, respectively. The proposed high-sensitivity sensor could be an attractive choice for sensing applications because of its straightforward design and ease of fabrication. Also, the combination of very high sensitivity and FOM in a tiny and compact configuration is ideal for on-chip plasmonic nanosensors.</div></div>\",\"PeriodicalId\":19513,\"journal\":{\"name\":\"Optik\",\"volume\":\"339 \",\"pages\":\"Article 172530\"},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2025-09-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Optik\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0030402625003183\",\"RegionNum\":3,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"Engineering\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optik","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0030402625003183","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Engineering","Score":null,"Total":0}
Highly sensitive Fano resonance due to coupling between metal-insulator-metal waveguide and semi-ring resonators
Fano resonance with asymmetric and sharp spectral features has recently been intriguing for refractive index sensing. In this study, we demonstrate a Fano resonance sensor that employs the coupling between a metal-insulator-metal (MIM) waveguide and a semi-ring resonator. The MIM waveguide has a three-ring resonator built in the center, and high-field confinement is observed due to the coupling of the two structures. The coupled structure's transmission spectrum exhibits three Fano resonance modes that are influenced by structure geometry and the surrounding medium's refractive index. The high-quality factor () of mode 3 indicates that this sensor is suitable for use in optical sensing applications. To achieve maximum sensing performance, the parameters of the proposed structure are manipulated and different sensing parameters are computed. The sensor's estimated sensitivity of 3164.97 nm/RIU is equivalent to that of other Fano resonance sensors. Additionally, for plasmonic MIM sensors, the developed sensor achieves high values of and of 5420.99 and 5641.57 , respectively. The proposed high-sensitivity sensor could be an attractive choice for sensing applications because of its straightforward design and ease of fabrication. Also, the combination of very high sensitivity and FOM in a tiny and compact configuration is ideal for on-chip plasmonic nanosensors.
期刊介绍:
Optik publishes articles on all subjects related to light and electron optics and offers a survey on the state of research and technical development within the following fields:
Optics:
-Optics design, geometrical and beam optics, wave optics-
Optical and micro-optical components, diffractive optics, devices and systems-
Photoelectric and optoelectronic devices-
Optical properties of materials, nonlinear optics, wave propagation and transmission in homogeneous and inhomogeneous materials-
Information optics, image formation and processing, holographic techniques, microscopes and spectrometer techniques, and image analysis-
Optical testing and measuring techniques-
Optical communication and computing-
Physiological optics-
As well as other related topics.