{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,25]],"date-time":"2026-10-25T03:17:30Z","timestamp":1792898250859,"version":"4.5.0"},"reference-count":44,"publisher":"Optica Publishing Group","issue":"33","license":[{"start":{"date-parts":[[2025,11,17]],"date-time":"2025-11-17T00:00:00Z","timestamp":1763337600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#VOR"},{"start":{"date-parts":[[2025,11,17]],"date-time":"2025-11-17T00:00:00Z","timestamp":1763337600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61575096"],"award-info":[{"award-number":["61575096"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61775102"],"award-info":[{"award-number":["61775102"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Appl. Opt."],"published-print":{"date-parts":[[2025,11,20]]},"abstract":"<jats:p>\n                    We present a Fano resonance-based metal-insulator-metal (MIM) waveguide sensor functionalized with a metal-organic framework (MOF) for low-concentration ethanol gas detection. The device features a smiley-shaped resonator and a bus waveguide with a baffle. Its resonant cavity is filled with ZIF-8, a MOF with high ethanol adsorption selectivity. Fano resonance arises from the interference between a broad continuum state provided by the Ag baffle and a discrete state provided by the smiley-shaped resonator. This leads to an asymmetric line profile that enhances sensitivity. By integrating Fano resonance in the MIM waveguide with ZIF-8\u2019s ethanol adsorption capability, the sensor achieves the detection of low-concentration ethanol gas. Simulations show that as ethanol concentration increases from 25 to 100\u00a0ppm, the refractive index of ZIF-8 changes by \u0394\n                    <jats:italic>n<\/jats:italic>\n                    =0.00717, inducing a 3.7\u00a0nm redshift, yielding a sensitivity of 54.4\u00a0pm\/ppm. The sensor achieves a detection limit of 25\u00a0ppm.\n                  <\/jats:p>","DOI":"10.1364\/ao.577663","type":"journal-article","created":{"date-parts":[[2025,10,30]],"date-time":"2025-10-30T14:00:11Z","timestamp":1761832811000},"page":"10092","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["ZIF-8 functionalized smiley-shaped resonator for high-sensitivity ethanol gas detection via Fano resonance in a MIM waveguide"],"prefix":"10.1364","volume":"64","author":[{"given":"Qinru","family":"Wu","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/043bpky34","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0644-094X","authenticated-orcid":true,"given":"Yunqing","family":"Lu","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/043bpky34","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4815-4688","authenticated-orcid":true,"given":"Ji","family":"Xu","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/043bpky34","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6018-4994","authenticated-orcid":true,"given":"Jin","family":"Wang","sequence":"additional","affiliation":[{"name":"Nanjing University of Posts and Telecommunications"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2025,11,17]]},"reference":[{"key":"ao-64-33-10092-R1","doi-asserted-by":"publisher","first-page":"8947","DOI":"10.1021\/acs.iecr.5b01711","type":"journal-article","volume":"54","author":"Ding","year":"2015","journal-title":"Ind. 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All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.","name":"copyright","label":"Copyright"}]}}