{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,31]],"date-time":"2025-10-31T16:55:26Z","timestamp":1761929726817,"version":"build-2065373602"},"reference-count":47,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2014,8,25]],"date-time":"2014-08-25T00:00:00Z","timestamp":1408924800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"NSFC","doi-asserted-by":"publisher","award":["No.61372038"],"award-info":[{"award-number":["No.61372038"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"National 973 Program","award":["No.2012CB315705"],"award-info":[{"award-number":["No.2012CB315705"]}]},{"name":"National 863 Program","award":["No.2011AA010306"],"award-info":[{"award-number":["No.2011AA010306"]}]},{"name":"Fund of State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), P. R. China"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>We theoretically demonstrate a low crosstalk ring-slot array structure used for label-free multiplexed sensing. The proposed sensors array is based on an array of three ring-slot and input\/output line defect coupling waveguides. Each ring-slot cavity has slightly different cavity spacing and different resonant frequency. Results obtained using two dimensional finite-difference time-domain (2D-FDTD) simulation indicate that the resonant frequencies of each sensor unit in response to the refractive index variations are independent. The refractive index sensitivity is 134 ~ 145.5 nm\/RIU (refractive index unit) and the Q factors more than 104 can be achieved. The calculated detect limit lower than 1.13 \u00d7 10\u22124 RIU is obtained. In addition, an extremely small crosstalk lower than \u221225.8 dB is achieved among the array of three ring-slot cavities. The results demonstrate that this multiplexed sensor array is a promising platform for integrated optical devices and enables highly parallel label-free detection.<\/jats:p>","DOI":"10.3390\/s140915658","type":"journal-article","created":{"date-parts":[[2014,8,25]],"date-time":"2014-08-25T11:58:03Z","timestamp":1408967883000},"page":"15658-15668","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":29,"title":["Design Low Crosstalk Ring-Slot Array Structure for Label-Free Multiplexed Sensing"],"prefix":"10.3390","volume":"14","author":[{"given":"Lijun","family":"Huang","sequence":"first","affiliation":[{"name":"State Key Laboratory of Information Photonics and Optical Communications, School of Information and Communication Engineering, Beijing University of Posts and Telecommunications,  Beijing 100876, China"},{"name":"Department of Physics and Information Engineering, Huaihua University, Huaihua 418008, China"}]},{"given":"Huiping","family":"Tian","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Information Photonics and Optical Communications, School of Information and Communication Engineering, Beijing University of Posts and Telecommunications,  Beijing 100876, China"}]},{"given":"Jian","family":"Zhou","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Information Photonics and Optical Communications, School of Information and Communication Engineering, Beijing University of Posts and Telecommunications,  Beijing 100876, China"}]},{"given":"Yuefeng","family":"Ji","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Information Photonics and Optical Communications, School of Information and Communication Engineering, Beijing University of Posts and Telecommunications,  Beijing 100876, China"}]}],"member":"1968","published-online":{"date-parts":[[2014,8,25]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"117","DOI":"10.1007\/s10404-007-0203-2","article-title":"Liquid-infiltrated photonic crystals: Enhanced light-matter interactions for lab-on-a-chip applications","volume":"4","author":"Mortensen","year":"2008","journal-title":"Microfluid. 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