{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,18]],"date-time":"2026-07-18T23:56:55Z","timestamp":1784419015111,"version":"3.55.0"},"reference-count":40,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2021,4,27]],"date-time":"2021-04-27T00:00:00Z","timestamp":1619481600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Shubin Yan","award":["61675185,61875250,  61975189"],"award-info":[{"award-number":["61675185,61875250,  61975189"]}]},{"name":"Shubin Yan","award":["LD21F050001"],"award-info":[{"award-number":["LD21F050001"]}]},{"name":"Shubin Yan","award":["2021C03019"],"award-info":[{"award-number":["2021C03019"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Micromachines"],"abstract":"<jats:p>A nanostructure comprising the metal-insulator-metal (MIM) bus waveguide with a stub coupled with a racetrack ring resonator is designed. The spectral characteristics of the proposed structure are analyzed via the finite element method (FEM). The results show that there is a sharp Fano resonance profile and electromagnetically induced transparency (EIT)-like effect, which are excited by a coupling between the MIM bus waveguide with a stub and the racetrack ring resonator. The normalized HZ field is affected by the displacement of the ring from the stub x greatly. The influence of the geometric parameters of the sensor design on the sensing performance is discussed. The sensitivity of the proposed structure can reach 1774 nm\/RIU with a figure of merit of 61. The proposed structure has potential in nanophotonic sensing applications.<\/jats:p>","DOI":"10.3390\/mi12050495","type":"journal-article","created":{"date-parts":[[2021,4,27]],"date-time":"2021-04-27T21:18:20Z","timestamp":1619558300000},"page":"495","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["A Nanosensor Based on a Metal-Insulator-Metal Bus Waveguide with a Stub Coupled with a Racetrack Ring Resonator"],"prefix":"10.3390","volume":"12","author":[{"given":"Haoran","family":"Shi","sequence":"first","affiliation":[{"name":"School of Instrument and Electronics, North University of China, Taiyuan 030051, China"},{"name":"School of Electronical Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310058, China"},{"name":"Zhejiang-Belarus Joint Laboratory of Intelligent Equipment and System for Water Con-Servancy and Hydropower Safety Monitoring, Hangzhou 310018, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7588-3616","authenticated-orcid":false,"given":"Shubin","family":"Yan","sequence":"additional","affiliation":[{"name":"School of Instrument and Electronics, North University of China, Taiyuan 030051, China"},{"name":"School of Electronical Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310058, China"},{"name":"Zhejiang-Belarus Joint Laboratory of Intelligent Equipment and System for Water Con-Servancy and Hydropower Safety Monitoring, Hangzhou 310018, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoyu","family":"Yang","sequence":"additional","affiliation":[{"name":"School of Instrument and Electronics, North University of China, Taiyuan 030051, China"},{"name":"School of Electronical Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310058, China"},{"name":"Zhejiang-Belarus Joint Laboratory of Intelligent Equipment and System for Water Con-Servancy and Hydropower Safety Monitoring, Hangzhou 310018, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiushan","family":"Wu","sequence":"additional","affiliation":[{"name":"School of Electronical Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310058, China"},{"name":"Zhejiang-Belarus Joint Laboratory of Intelligent Equipment and System for Water Con-Servancy and Hydropower Safety Monitoring, Hangzhou 310018, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenchang","family":"Wu","sequence":"additional","affiliation":[{"name":"Zhejiang-Belarus Joint Laboratory of Intelligent Equipment and System for Water Con-Servancy and Hydropower Safety Monitoring, Hangzhou 310018, China"},{"name":"School of Electron and Information Engineering, Ningbo University of Technology, Ningbo 310058, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ertian","family":"Hua","sequence":"additional","affiliation":[{"name":"School of Electronical Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310058, China"},{"name":"Zhejiang-Belarus Joint Laboratory of Intelligent Equipment and System for Water Con-Servancy and Hydropower Safety Monitoring, Hangzhou 310018, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,4,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"113798","DOI":"10.1016\/j.physe.2019.113798","article-title":"Plasmonic sensors based on Metal-insulator-metal waveguides for refractive index sensing applications: A brief review","volume":"117","author":"Kazanskiy","year":"2020","journal-title":"Phys. E Low Dimens. Syst. Nanostruct."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"e294","DOI":"10.1038\/lsa.2015.67","article-title":"Nanoplasmonic waveguides: Towards applications in integrated nanophotonic circuits","volume":"4","author":"Fang","year":"2015","journal-title":"Light Sci. Appl."},{"key":"ref_3","first-page":"973","article-title":"State-of-the-Art Optical Devices for Biomedical Sensing Applications","volume":"10","author":"Kazanskiy","year":"2021","journal-title":"Review"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"326","DOI":"10.1016\/j.optcom.2018.06.042","article-title":"Dual Fano resonance control and refractive index sensors based on a plasmonic waveguide-coupled resonator system","volume":"427","author":"Shi","year":"2018","journal-title":"Opt. Commun."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1866","DOI":"10.1103\/PhysRev.124.1866","article-title":"Effects of configuration interaction on intensities and phase shifts","volume":"124","author":"Fano","year":"1961","journal-title":"Phy. Rev."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"7959","DOI":"10.3390\/s140507959","article-title":"Recent Advances in Plasmonic Sensors","volume":"14","author":"Tong","year":"2014","journal-title":"Sensors"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1291","DOI":"10.1007\/s11468-015-0174-1","article-title":"A MIM Filter Based on a Side-Coupled Crossbeam Square-Ring Resonator","volume":"11","author":"Wang","year":"2016","journal-title":"Plasmonics"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"10907","DOI":"10.1364\/OE.19.010907","article-title":"Fano-type spectral asymmetry and its control for plasmonic metal-insulator-metal stub structures","volume":"19","author":"Piao","year":"2011","journal-title":"Opt. Express"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"217","DOI":"10.1007\/s13320-017-0418-0","article-title":"A study on refractive index sensors based on optical micro-ring resonators","volume":"7","author":"Tsigaridas","year":"2017","journal-title":"Photonic Sens."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"40599","DOI":"10.1109\/ACCESS.2020.2974491","article-title":"High-Performance Nano-Sensing and Slow-Light Applications Based on Tunable Multiple Fano Resonances and EIT-Like Effects in Coupled Plasmonic Resonator System","volume":"8","author":"Wang","year":"2020","journal-title":"IEEE Access"},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Yang, T., Liu, X.M., and Zhou, J. (2021). Terahertz Polarization Conversion in an Electromagnetically Induced Transparency (EIT)-Like Metamaterial. Annalen Der. Physik., 533.","DOI":"10.1002\/andp.202000528"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"2876","DOI":"10.1109\/JLT.2013.2275950","article-title":"Optical Nanofilters Based on Meta-Atom Side-Coupled Plasmonics Metal-Insulator-Metal Waveguides","volume":"31","author":"Ma","year":"2013","journal-title":"J. Lightwave Technol."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"139","DOI":"10.1007\/s11468-014-9787-z","article-title":"Tunable Multichannel Plasmonic Filter Based on Coupling-Induced Mode Splitting","volume":"10","author":"Zhang","year":"2015","journal-title":"Plasmonics"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"797","DOI":"10.1007\/s11468-012-9475-9","article-title":"Fano resonance in a gear-shaped nanocavity of the metal\u2013insulator\u2013metal waveguide","volume":"8","author":"Zhang","year":"2013","journal-title":"Plasmonics"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"1339","DOI":"10.1007\/s11082-014-0059-0","article-title":"Infrared plasmonic refractive index-sensitive nanosensor based on electromagnetically induced transparency of waveguide resonator systems","volume":"47","author":"Ni","year":"2015","journal-title":"Opt. Quantum Electron."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"303","DOI":"10.1038\/nphoton.2007.84","article-title":"A roadmap for nanophotonics","volume":"1","author":"Kirchain","year":"2007","journal-title":"Nat. Photonics"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"444007","DOI":"10.1088\/0957-4484\/23\/44\/444007","article-title":"An omni-directional mid-infrared tunable plasmonic polarization filter","volume":"23","author":"Abbas","year":"2012","journal-title":"Nanotechnology"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"166237","DOI":"10.1016\/j.ijleo.2020.166237","article-title":"Sensor based on multiple Fano resonances in MIM waveguide resonator system with silver nanorod-defect","volume":"229","author":"Hu","year":"2021","journal-title":"Optik"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"132","DOI":"10.1016\/j.optcom.2016.07.068","article-title":"Comparison of finite element and transfer matrix methods for numerical investigation of surface plasmon waveguides","volume":"382","author":"Haddouche","year":"2017","journal-title":"Opt. Commun."},{"key":"ref_20","first-page":"482","article-title":"Fano resonance in a MIM waveguide with double symmetric rectangular stubs and its sensing characteristics","volume":"19","author":"Chen","year":"2021","journal-title":"Opt. Commun."},{"key":"ref_21","first-page":"132","article-title":"Tunable sharp resonances based on multimode interference in a MIM-ring coupling plasmonic resonator system","volume":"24","author":"Qi","year":"2020","journal-title":"Opt. Epx."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"165163","DOI":"10.1016\/j.ijleo.2020.165163","article-title":"Multiple Fano resonance in MIM waveguide system with cross-shaped cavity","volume":"220","author":"Yang","year":"2020","journal-title":"Optik"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"125614","DOI":"10.1016\/j.optcom.2020.125614","article-title":"A nanosensor with ultra-high FOM based on tunable malleable multiple Fano resonances in a waveguide coupled isosceles triangular resonator","volume":"465","author":"Wang","year":"2020","journal-title":"Opt. Commun."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"19978","DOI":"10.1364\/OE.395696","article-title":"MIM waveguide structure consisting of a semicircular resonant cavity coupled with a key-shaped resonant cavity","volume":"28","author":"Zhu","year":"2020","journal-title":"Opt. Express"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"7","DOI":"10.1088\/1555-6611\/ab9090","article-title":"Nanodots decorated asymmetric metal-insulator-metal waveguide resonator structure based on Fano resonances for refractive index sensing application","volume":"30","author":"Butt","year":"2020","journal-title":"Laser Physics."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Chou Chao, C.-T., Chou Chau, Y.-F., Huang, H.J., Kumara, N.T.R.N., Kooh, M.R.R., Lim, C.M., and Chiang, H.-P. (2020). Highly Sensitive and Tunable Plasmonic Sensor Based on a Nanoring Resonator with Silver Nanorods. Nanomaterials, 10.","DOI":"10.3390\/nano10071399"},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Chou Chau, Y.-F., Chou Chao, C.-T., Huang, H.J., Kumara, N.T.R.N., Lim, C.M., and Chiang, H.-P. (2019). Ultra-High Refractive Index Sensing Structure Based on a Metal-Insulator-Metal Waveguide-Coupled T-Shape Cavity with Metal Nanorod Defects. Nanomaterials, 9.","DOI":"10.3390\/nano9101433"},{"key":"ref_28","first-page":"11","article-title":"Mid-infrared sensing properties of a plasmonic metal-insulator-metal waveguide with a single stub including defects","volume":"53","author":"Chau","year":"2020","journal-title":"J. Phys. D Appl. Phys."},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Chau, Y.-F.C., Chao, C.-T.C., Huang, H.J., Anwar, U., Lim, C.M., Voo, N.Y., Mahadi, A.H., and Chiang, H.P. (2019). Plasmonic perfect absorber based on metal nanorod arrays connected with veins. Results Phys., 15.","DOI":"10.1016\/j.rinp.2019.102567"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"102290","DOI":"10.1016\/j.rinp.2019.102290","article-title":"Strong and tunable plasmonic field coupling and enhancement generating from the protruded metal nanorods and dielectric cores","volume":"13","author":"Chau","year":"2019","journal-title":"Results Phys."},{"key":"ref_31","first-page":"11","article-title":"Highly sensitive metal-insulator-metal plasmonic refractive index sensor with a centrally coupled nanoring containing defects","volume":"54","author":"Chao","year":"2021","journal-title":"J. Phys. D Appl. Phys."},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Chou Chau, Y.-F., Chou Chao, C.-T., Huang, H.J., Kooh, M.R.R., Kumara, N.T.R.N., Lim, C.M., and Chiang, H.-P. (2020). Ultrawide Bandgap and High Sensitivity of a Plasmonic Metal-Insulator-Metal Waveguide Filter with Cavity and Baffles. Nanomaterials, 10.","DOI":"10.3390\/nano10102030"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"1274","DOI":"10.1016\/j.cap.2020.08.020","article-title":"Highly integrated plasmonic sensor design for the simultaneous detection of multiple analytes","volume":"20","author":"Butt","year":"2020","journal-title":"Curr. Appl. Phys."},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Chou Chau, Y.-F., Chou Chao, C.-T., Huang, H.J., Kooh, M.R.R., Kumara, N.T.R.N., Lim, C.M., and Chiang, H.-P. (2020). Perfect Dual-Band Absorber Based on Plasmonic Effect with the Cross-Hair\/Nanorod Combination. Nanomaterials, 10.","DOI":"10.3390\/nano10030493"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"286","DOI":"10.1016\/j.cjph.2021.02.006","article-title":"Plasmonic refractive index sensor based on the combination of rectangular and circular resonators including baffles","volume":"71","author":"Jumat","year":"2021","journal-title":"Chin. J. Phys."},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Su, H., Yan, S., Yang, X., Guo, J., Wang, J., and Hua, E. (2020). Sensing Features of the Fano Resonance in an MIM Waveguide Coupled with an Elliptical Ring Resonant Cavity. Appl. Sci., 10.","DOI":"10.3390\/app10155096"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"103116","DOI":"10.1016\/j.rinp.2020.103116","article-title":"Ultra-broad band gap metal-insulator-metal waveguide filter with symmetrical stubs and defects","volume":"17","author":"Chau","year":"2020","journal-title":"Results Phys."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"164","DOI":"10.1016\/j.optcom.2014.08.039","article-title":"A T-shaped high resolution plasmonic demultiplexer based on perturbations of two nanoresonators","volume":"334","author":"Liu","year":"2015","journal-title":"Opt. Commun."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"7","DOI":"10.1007\/s11051-018-4293-4","article-title":"Plasmonic effects in composite metal nanostructures for sensing applications","volume":"20","author":"Chau","year":"2018","journal-title":"J. Nanopart. Res."},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Chou Chau, Y.-F., Chen, K.-H., Chiang, H.-P., Lim, C.M., Huang, H.J., Lai, C.-H., and Kumara, N.T.R.N. (2019). Fabrication and Characterization of a Metallic\u2013Dielectric Nanorod Array by Nanosphere Lithography for Plasmonic Sensing Application. Nanomaterials, 9.","DOI":"10.3390\/nano9121691"}],"container-title":["Micromachines"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-666X\/12\/5\/495\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T05:53:24Z","timestamp":1760162004000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-666X\/12\/5\/495"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,4,27]]},"references-count":40,"journal-issue":{"issue":"5","published-online":{"date-parts":[[2021,5]]}},"alternative-id":["mi12050495"],"URL":"https:\/\/doi.org\/10.3390\/mi12050495","relation":{},"ISSN":["2072-666X"],"issn-type":[{"value":"2072-666X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,4,27]]}}}