{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,22]],"date-time":"2026-04-22T17:53:37Z","timestamp":1776880417230,"version":"3.51.2"},"reference-count":40,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2024,3,20]],"date-time":"2024-03-20T00:00:00Z","timestamp":1710892800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>We have investigated a polarization property of the (specularly) reflected light from an aluminum grating, coated with a palladium (Pd) thin-film on its surface. The polarization property, which is associated with surface plasmon resonance (SPR), and occurs in the Pd thin-film on the aluminum grating in a conical mounting, is observed as a rapid change in the normalized Stokes parameter s3, around the resonance angle, \u03b8sp, at which point, SPR occurs. The sensing technique used the rapid change in s3 to allow us to successfully detect a small change in the complex refractive index of the Pd thin-film layer upon exposure to hydrogen gas, with a concentration near the lower explosion level. Experimental results showed that the sensing technique provided a sensitive and stable response when the Pd thin-film layer was exposed to gas mixtures containing hydrogen at concentrations of 1 to 4% (by volume) in nitrogen.<\/jats:p>","DOI":"10.3390\/s24061990","type":"journal-article","created":{"date-parts":[[2024,3,20]],"date-time":"2024-03-20T13:09:36Z","timestamp":1710940176000},"page":"1990","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Polarization Property Associated with Surface Plasmon Resonance in a Palladium Thin-Film Coated Aluminum Grating in a Conical Mounting and Its Application to Hydrogen Gas Detection"],"prefix":"10.3390","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0126-6690","authenticated-orcid":false,"given":"Toyonori","family":"Matsuda","sequence":"first","affiliation":[{"name":"Institute of National College of Technology, Kumamoto College, Kumamoto Campus, 2659-2 Suya, Koshi 861-1102, Kumamoto, Japan"}]},{"given":"Isao","family":"Tsunoda","sequence":"additional","affiliation":[{"name":"Institute of National College of Technology, Kumamoto College, Kumamoto Campus, 2659-2 Suya, Koshi 861-1102, Kumamoto, Japan"}]},{"given":"Shinichiro","family":"Koba","sequence":"additional","affiliation":[{"name":"Institute of National College of Technology, Kumamoto College, Yatsushiro Campus, 2627 Hirayamashin-Machi, Yatsushiro 866-8501, Kumamoto, Japan"}]},{"given":"Yu","family":"Oshiro","sequence":"additional","affiliation":[{"name":"Institute of National College of Technology, Kumamoto College, Kumamoto Campus, 2659-2 Suya, Koshi 861-1102, Kumamoto, Japan"}]},{"given":"Hiroyuki","family":"Odagawa","sequence":"additional","affiliation":[{"name":"Institute of National College of Technology, Kumamoto College, Kumamoto Campus, 2659-2 Suya, Koshi 861-1102, Kumamoto, Japan"}]}],"member":"1968","published-online":{"date-parts":[[2024,3,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"26076","DOI":"10.1016\/j.ijhydene.2019.08.052","article-title":"Hydrogen gas sensing methods, materials, and approach to achieve parts per billion level detection: A review","volume":"44","author":"Chauhan","year":"2019","journal-title":"Int. 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