{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,14]],"date-time":"2026-02-14T10:02:02Z","timestamp":1771063322420,"version":"3.50.1"},"reference-count":26,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2022,11,23]],"date-time":"2022-11-23T00:00:00Z","timestamp":1669161600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science Foundation of China (NSFC)","award":["62105095"],"award-info":[{"award-number":["62105095"]}]},{"name":"National Natural Science Foundation of China (NSFC)","award":["U1804261"],"award-info":[{"award-number":["U1804261"]}]},{"name":"National Natural Science Foundation of China (NSFC)","award":["202300410238"],"award-info":[{"award-number":["202300410238"]}]},{"name":"National Natural Science Foundation of China (NSFC)","award":["20210381"],"award-info":[{"award-number":["20210381"]}]},{"name":"National Natural Science Foundation of China (NSFC)","award":["23IRTSTHN013"],"award-info":[{"award-number":["23IRTSTHN013"]}]},{"name":"Natural Science Foundation of Henan","award":["62105095"],"award-info":[{"award-number":["62105095"]}]},{"name":"Natural Science Foundation of Henan","award":["U1804261"],"award-info":[{"award-number":["U1804261"]}]},{"name":"Natural Science Foundation of Henan","award":["202300410238"],"award-info":[{"award-number":["202300410238"]}]},{"name":"Natural Science Foundation of Henan","award":["20210381"],"award-info":[{"award-number":["20210381"]}]},{"name":"Natural Science Foundation of Henan","award":["23IRTSTHN013"],"award-info":[{"award-number":["23IRTSTHN013"]}]},{"name":"National Scientific Research Project Cultivation Fund of Henan Normal University","award":["62105095"],"award-info":[{"award-number":["62105095"]}]},{"name":"National Scientific Research Project Cultivation Fund of Henan Normal University","award":["U1804261"],"award-info":[{"award-number":["U1804261"]}]},{"name":"National Scientific Research Project Cultivation Fund of Henan Normal University","award":["202300410238"],"award-info":[{"award-number":["202300410238"]}]},{"name":"National Scientific Research Project Cultivation Fund of Henan Normal University","award":["20210381"],"award-info":[{"award-number":["20210381"]}]},{"name":"National Scientific Research Project Cultivation Fund of Henan Normal University","award":["23IRTSTHN013"],"award-info":[{"award-number":["23IRTSTHN013"]}]},{"name":"Program for Innovative Research Team (in Science and Technology) in University of Henan Province","award":["62105095"],"award-info":[{"award-number":["62105095"]}]},{"name":"Program for Innovative Research Team (in Science and Technology) in University of Henan Province","award":["U1804261"],"award-info":[{"award-number":["U1804261"]}]},{"name":"Program for Innovative Research Team (in Science and Technology) in University of Henan Province","award":["202300410238"],"award-info":[{"award-number":["202300410238"]}]},{"name":"Program for Innovative Research Team (in Science and Technology) in University of Henan Province","award":["20210381"],"award-info":[{"award-number":["20210381"]}]},{"name":"Program for Innovative Research Team (in Science and Technology) in University of Henan Province","award":["23IRTSTHN013"],"award-info":[{"award-number":["23IRTSTHN013"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Here, we experimentally demonstrate a wedged fiber optic surface plasmon resonance (SPR) sensor enabling high-sensitivity temperature detection. The sensing probe has a geometry with two asymmetrical bevels, with one inclined surface coated with an optically thin film supporting propagating plasmons and the other coated with a reflecting metal film. The angle of incident light can be readily tuned through modifying the beveled angles of the fiber tip, which has a remarkable impact on the refractive index sensitivity of SPR sensors. As a result, we measure a high refractive index sensitivity as large as 8161 nm\/RIU in a wide refractive index range of 1.333\u20131.404 for the optimized sensor. Furthermore, we carry out a temperature-sensitivity measurement by packaging the SPR probe into a capillary filled with n-butanol. This showed a temperature sensitivity reaching up to \u22123.35 nm\/\u00b0C in a wide temperature range of 20 \u00b0C\u2013100 \u00b0C. These experimental results are well in agreement with those obtained from simulations, thus suggesting that our work may be of significance in designing reflective fiber optic SPR sensing probes with modified geometries.<\/jats:p>","DOI":"10.3390\/s22239099","type":"journal-article","created":{"date-parts":[[2022,11,24]],"date-time":"2022-11-24T03:58:16Z","timestamp":1669262296000},"page":"9099","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Wedged Fiber Optic Surface Plasmon Resonance Sensor for High-Sensitivity Refractive Index and Temperature Measurements"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4830-7899","authenticated-orcid":false,"given":"Lixia","family":"Li","sequence":"first","affiliation":[{"name":"Henan Key Laboratory of Infrared Materials & Spectrum Measures and Applications, School of Physics, Henan Normal University, Xinxiang 453007, China"}]},{"given":"Yuli","family":"Li","sequence":"additional","affiliation":[{"name":"Henan Key Laboratory of Infrared Materials & Spectrum Measures and Applications, School of Physics, Henan Normal University, Xinxiang 453007, China"}]},{"given":"Xueyang","family":"Zong","sequence":"additional","affiliation":[{"name":"Henan Key Laboratory of Infrared Materials & Spectrum Measures and Applications, School of Physics, Henan Normal University, Xinxiang 453007, China"}]},{"given":"Linlin","family":"Zhao","sequence":"additional","affiliation":[{"name":"Henan Key Laboratory of Infrared Materials & Spectrum Measures and Applications, School of Physics, Henan Normal University, Xinxiang 453007, China"}]},{"given":"Penglei","family":"Li","sequence":"additional","affiliation":[{"name":"Henan Key Laboratory of Infrared Materials & Spectrum Measures and Applications, School of Physics, Henan Normal University, Xinxiang 453007, China"}]},{"given":"Kun","family":"Yu","sequence":"additional","affiliation":[{"name":"Henan Key Laboratory of Infrared Materials & Spectrum Measures and Applications, School of Physics, Henan Normal University, Xinxiang 453007, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1896-8864","authenticated-orcid":false,"given":"Yufang","family":"Liu","sequence":"additional","affiliation":[{"name":"Henan Key Laboratory of Infrared Materials & Spectrum Measures and Applications, School of Physics, Henan Normal University, Xinxiang 453007, China"}]}],"member":"1968","published-online":{"date-parts":[[2022,11,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Duan, Q., Liu, Y., Chang, S., Chen, H., and Chen, J.H. 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