{"title":"基于杂化超表面的手性准束缚态对映体分析。","authors":"Houjiao Zhang, Xuanyi Liu, Shuang Qiu, Haoyang Li, Zhang-Kai Zhou","doi":"10.1364/OL.566157","DOIUrl":null,"url":null,"abstract":"<p><p>Optical sensing offers an effective and promising method for molecular detection, yet quantifying enantiomer concentrations remains a critical challenge. Here, we present a SiC-Au hybrid metasurface supporting the chiral quasi-bound state in the continuum (BIC) mode, manipulated by the rotation angle <i>φ</i><sub>L</sub>. An enantiomer analysis method is proposed to obtain d- and l-enantiomer concentrations from peak wavelength and intensity of circular dichroism (CD). At <i>φ</i><sub>L</sub> = 20°, the hybrid design yields a strong CD value (0.62) and a high quality (<i>Q</i>) factor (295). Moreover, the electric field (EF) and the optical chirality (<i>C</i>) are both strongly localized near the structural surface, enhancing the sensitivity of refractive index (RI) and CD sensing (<i>S</i><sub>RI</sub> = 436 nm/RIU, <i>S</i><sub>CD</sub> = -247). Compared to the all-dielectric metasurface, the hybrid design achieves 11- and 80-fold improvements in <i>S</i><sub>RI</sub> and <i>S</i><sub>CD</sub>, enabling label-free, sensitive, and rapid detection for environmental, biomedical, and industrial applications.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 15","pages":"4814-4817"},"PeriodicalIF":3.3000,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Chiral quasi-bound states in the continuum based on hybrid metasurfaces for enantiomer analysis.\",\"authors\":\"Houjiao Zhang, Xuanyi Liu, Shuang Qiu, Haoyang Li, Zhang-Kai Zhou\",\"doi\":\"10.1364/OL.566157\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Optical sensing offers an effective and promising method for molecular detection, yet quantifying enantiomer concentrations remains a critical challenge. Here, we present a SiC-Au hybrid metasurface supporting the chiral quasi-bound state in the continuum (BIC) mode, manipulated by the rotation angle <i>φ</i><sub>L</sub>. An enantiomer analysis method is proposed to obtain d- and l-enantiomer concentrations from peak wavelength and intensity of circular dichroism (CD). At <i>φ</i><sub>L</sub> = 20°, the hybrid design yields a strong CD value (0.62) and a high quality (<i>Q</i>) factor (295). Moreover, the electric field (EF) and the optical chirality (<i>C</i>) are both strongly localized near the structural surface, enhancing the sensitivity of refractive index (RI) and CD sensing (<i>S</i><sub>RI</sub> = 436 nm/RIU, <i>S</i><sub>CD</sub> = -247). Compared to the all-dielectric metasurface, the hybrid design achieves 11- and 80-fold improvements in <i>S</i><sub>RI</sub> and <i>S</i><sub>CD</sub>, enabling label-free, sensitive, and rapid detection for environmental, biomedical, and industrial applications.</p>\",\"PeriodicalId\":19540,\"journal\":{\"name\":\"Optics letters\",\"volume\":\"50 15\",\"pages\":\"4814-4817\"},\"PeriodicalIF\":3.3000,\"publicationDate\":\"2025-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Optics letters\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1364/OL.566157\",\"RegionNum\":2,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"OPTICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1364/OL.566157","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
Chiral quasi-bound states in the continuum based on hybrid metasurfaces for enantiomer analysis.
Optical sensing offers an effective and promising method for molecular detection, yet quantifying enantiomer concentrations remains a critical challenge. Here, we present a SiC-Au hybrid metasurface supporting the chiral quasi-bound state in the continuum (BIC) mode, manipulated by the rotation angle φL. An enantiomer analysis method is proposed to obtain d- and l-enantiomer concentrations from peak wavelength and intensity of circular dichroism (CD). At φL = 20°, the hybrid design yields a strong CD value (0.62) and a high quality (Q) factor (295). Moreover, the electric field (EF) and the optical chirality (C) are both strongly localized near the structural surface, enhancing the sensitivity of refractive index (RI) and CD sensing (SRI = 436 nm/RIU, SCD = -247). Compared to the all-dielectric metasurface, the hybrid design achieves 11- and 80-fold improvements in SRI and SCD, enabling label-free, sensitive, and rapid detection for environmental, biomedical, and industrial applications.
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The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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