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Express"],"published-print":{"date-parts":[[2025,2,10]]},"abstract":"<jats:p>Terahertz attenuated total reflection (ATR) technique serves as a pivotal tool for the spectroscopic analysis of liquids. However, when measuring liquids, conventional single internal reflection probes exhibit low sensitivity and detection accuracy due to the limited interaction between the evanescent wave and the sample. To address this limitation, we designed and constructed a terahertz liquids ATR probe utilizing a triple internal reflection prism, which effectively enhances the interaction between the evanescent wave and the liquid by increasing the number of reflections within the prism. Experimental results demonstrate that the terahertz triple ATR probe achieves high accuracy in measuring the sample's optical constants. By exploiting the differences in terahertz wave absorption among different polar solvents, the proposed probe effectively recognizes polar solvents such as ethanol, water, isopropanol, and acetone. In terms of sensor performance, the sensitivity of our probe, which employs a triple internal reflection scheme, is three times that of a conventional single internal reflection probe. This increased sensitivity further enhances the accuracy of measuring small changes in solution composition.<\/jats:p>","DOI":"10.1364\/oe.546161","type":"journal-article","created":{"date-parts":[[2025,1,7]],"date-time":"2025-01-07T03:00:43Z","timestamp":1736218843000},"page":"5021","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Increase the sensitivity of terahertz liquid detection using a triple attenuated total reflection probe"],"prefix":"10.1364","volume":"33","author":[{"given":"Shengao","family":"Wu","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/00ay9v204","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yinghao","family":"Yuan","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/00ay9v204","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gaopeng","family":"Li","sequence":"additional","affiliation":[{"name":"B-THz Information Technology (Wuhan) Co., Ltd."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yiming","family":"Zhu","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/00ay9v204","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Tongji University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6848-5257","authenticated-orcid":true,"given":"Lin","family":"Chen","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/00ay9v204","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Tongji University"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2025,1,31]]},"reference":[{"key":"oe-33-3-5021-R1","doi-asserted-by":"publisher","first-page":"122","DOI":"10.1016\/j.ejpb.2016.06.007","volume":"105","author":"Bawuah","year":"2016","journal-title":"Eur. 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