{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,10]],"date-time":"2026-09-10T00:43:55Z","timestamp":1789001035507,"version":"build-2803163510"},"reference-count":33,"publisher":"Public Library of Science (PLoS)","issue":"10","license":[{"start":{"date-parts":[[2025,10,27]],"date-time":"2025-10-27T00:00:00Z","timestamp":1761523200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS One"],"abstract":"<jats:p>\n                    In this paper, we propose a dual-channel surface refractive index sensor based on optical fiber lossy mode resonance (LMR). A multilayer transmission matrix model is constructed to simulate and analyze the optical fiber LMR effect based on two semiconductor oxides, SnO\n                    <jats:sub>2<\/jats:sub>\n                    and TiO\n                    <jats:sub>2<\/jats:sub>\n                    . Through the rational design of structural parameters, we successfully realize the coexistence of mutually independent LMRs on a single fiber, thereby enabling dual-channel sensing. The dual-channel optical fiber LMR sensor was prepared by electrostatically assembling TiO\n                    <jats:sub>2<\/jats:sub>\n                    nanofilms and SnO\n                    <jats:sub>2<\/jats:sub>\n                    nanofilms on the sidewall of the optical fiber. The refractive index sensitivity of the dual-channel optical fiber LMR was evaluated via wavelength interrogation, achieving dual-channel refractive index sensing. The refractive index sensitivities are 538.422\u2009nm\/RIU and 615.647\u2009nm\/RIU in the range of 1.3350\u2009~\u20091.3742. The dual-channel optical fiber LMR refractometer designed in this investigation is a promising platform for the simultaneous detection of multiple protein species and heavy metal ions in biochemical applications.\n                  <\/jats:p>","DOI":"10.1371\/journal.pone.0334249","type":"journal-article","created":{"date-parts":[[2025,10,27]],"date-time":"2025-10-27T17:40:17Z","timestamp":1761586817000},"page":"e0334249","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":1,"title":["Dual-resonance optical fiber lossy mode resonance refractive index 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