{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:22:55Z","timestamp":1760149375070,"version":"build-2065373602"},"reference-count":52,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2023,7,27]],"date-time":"2023-07-27T00:00:00Z","timestamp":1690416000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science Foundation of China","award":["61275043","61307048","60877034","61605128","2020A1515011154","JCYJ20190808151017218","JCYJ20190808161801637","JCYJ20180305124247521"],"award-info":[{"award-number":["61275043","61307048","60877034","61605128","2020A1515011154","JCYJ20190808151017218","JCYJ20190808161801637","JCYJ20180305124247521"]}]},{"DOI":"10.13039\/501100003453","name":"Natural Science Foundation of Guangdong Province","doi-asserted-by":"publisher","award":["61275043","61307048","60877034","61605128","2020A1515011154","JCYJ20190808151017218","JCYJ20190808161801637","JCYJ20180305124247521"],"award-info":[{"award-number":["61275043","61307048","60877034","61605128","2020A1515011154","JCYJ20190808151017218","JCYJ20190808161801637","JCYJ20180305124247521"]}],"id":[{"id":"10.13039\/501100003453","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Natural Science Foundation of Shenzhen City","award":["61275043","61307048","60877034","61605128","2020A1515011154","JCYJ20190808151017218","JCYJ20190808161801637","JCYJ20180305124247521"],"award-info":[{"award-number":["61275043","61307048","60877034","61605128","2020A1515011154","JCYJ20190808151017218","JCYJ20190808161801637","JCYJ20180305124247521"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Bound states in the continuum (BICs) garnered significant research interest in the field of sensors due to their exceptionally high-quality factors. However, the wide-band continuum in BICs are noise to the bound states, and it is difficult to control and filter. Therefore, we constructed a top-bottom symmetric cavity containing three high permittivity rectangular columns. The cavity supports a symmetry-protected (SP) superbound state (SBS) mode and an accidental (AC) SBS mode within the bandgap. With a period size of 5 \u00d7 15, the bandgap effectively filters out the continuum, allowing only the bound states to exist. This configuration enabled us to achieve a high signal-to-noise ratio and a wide free-spectral-range. The AC SBS and the SP SBS can be converted into quasi-SBS by adjusting different parameters. Consequently, the cavity can function as a single-band sensor or a dual-band sensor. The achieved bulk sensitivity was 38 \u00b5m\/RIU in terahertz wave band, and a record-high FOM reached 2.8 \u00d7 108 RIU\u22121. The effect of fabrication error on the performance for sensor application was also discussed, showing that the application was feasible. Moreover, for experimental realization, a 3D schematic was presented. These achievements pave the way for compact, high-sensitivity biosensing, multi-wavelength sensing, and other promising applications.<\/jats:p>","DOI":"10.3390\/s23156737","type":"journal-article","created":{"date-parts":[[2023,7,28]],"date-time":"2023-07-28T02:10:45Z","timestamp":1690510245000},"page":"6737","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Two Individual Super-Bound State Modes within Band Gap with Ultra-High Q Factor for Potential Sensing Applications in the Terahertz Wave Band"],"prefix":"10.3390","volume":"23","author":[{"given":"Yinbing","family":"An","sequence":"first","affiliation":[{"name":"College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China"},{"name":"THz Technical Research Center, Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tao","family":"Fu","sequence":"additional","affiliation":[{"name":"Guangxi Key Laboratory of Precision Navigation Technology and Application, Guilin University of Electronic Technology, Guilin 541004, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5223-208X","authenticated-orcid":false,"given":"Chunyu","family":"Guo","sequence":"additional","affiliation":[{"name":"College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jihong","family":"Pei","sequence":"additional","affiliation":[{"name":"College of Electronics and Information Engineering, Shenzhen University, Shenzhen 518060, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1466-7813","authenticated-orcid":false,"given":"Zhengbiao","family":"Ouyang","sequence":"additional","affiliation":[{"name":"College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China"},{"name":"THz Technical Research Center, Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,7,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"16048","DOI":"10.1038\/natrevmats.2016.48","article-title":"Bound states in the continuum","volume":"1","author":"Hsu","year":"2016","journal-title":"Nat. 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