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However, FOSPR sensing devices with a flat plasmonic film on the optical fiber tip are seldom proposed with most reports concentrating on fiber sidewalls. In this paper, we propose and experimentally demonstrate the plasmonic coupled structure of a gold (Au) nanodisk array and a thin film integrated into the fiber facet, enabling the excitation of the plasmon mode on the planar gold film by strong coupling. This plasmonic fiber sensor is fabricated by the ultraviolet (UV) curing adhesive transferring technology from a planar substrate to a fiber facet. The experimental results demonstrate that the fabricated sensing probe has a bulk refractive index sensitivity of 137.28 nm\/RIU and exhibits moderate surface sensitivity by measuring the spatial localization of its excited plasmon mode on Au film by layer-by-layer self-assembly technology. Furthermore, the fabricated plasmonic sensing probe enables the detection of bovine serum albumin (BSA) biomolecule with a detection limit of 19.35 \u03bcM. The demonstrated fiber probe here provides a potential strategy to integrate plasmonic nanostructure on the fiber facet with excellent sensing performance, which has a unique application prospect in the detection of remote, in situ, and in vivo invasion.<\/jats:p>","DOI":"10.3390\/s23084163","type":"journal-article","created":{"date-parts":[[2023,4,24]],"date-time":"2023-04-24T03:04:08Z","timestamp":1682305448000},"page":"4163","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Plasmonic Resonance Coupling of Nanodisk Array\/Thin Film on the Optical Fiber Tip for Integrated and Miniaturized Sensing Detection"],"prefix":"10.3390","volume":"23","author":[{"given":"Hao","family":"He","sequence":"first","affiliation":[{"name":"School of Physics, Dalian University of Technology, Dalian 116024, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6216-640X","authenticated-orcid":false,"given":"Xinran","family":"Wei","sequence":"additional","affiliation":[{"name":"School of Physics, Dalian University of Technology, Dalian 116024, China"}]},{"given":"Yijin","family":"He","sequence":"additional","affiliation":[{"name":"School of Physics, Dalian University of Technology, Dalian 116024, China"}]},{"given":"Yuzhang","family":"Liang","sequence":"additional","affiliation":[{"name":"School of Physics, Dalian University of Technology, Dalian 116024, China"}]},{"given":"Yurui","family":"Fang","sequence":"additional","affiliation":[{"name":"School of Physics, Dalian University of Technology, Dalian 116024, China"}]},{"given":"Wei","family":"Peng","sequence":"additional","affiliation":[{"name":"School of Physics, Dalian University of Technology, Dalian 116024, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,4,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"3883","DOI":"10.1007\/s00216-014-8411-6","article-title":"Review of plasmonic fiber optic biochemical sensors: Improving the limit of detection","volume":"407","author":"Caucheteur","year":"2015","journal-title":"Anal. 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