Fan Shaped THz Frequency Selective Surface for Narrowband Biomolecular Fingerprint Spectroscopy

Fan Shaped THz Frequency Selective Surface for Narrowband Biomolecular Fingerprint Spectroscopy | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Fan Shaped THz Frequency Selective Surface for Narrowband Biomolecular Fingerprint Spectroscopy Anitha George, Abdulla P This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9048281/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 4 You are reading this latest preprint version Abstract A high-Q fan-shaped metasurface bandpass filter operating in the terahertz (THz) regime is presented for narrowbandbiomolecular fingerprint spectroscopy. Full-wave simulations demonstrate a peak transmission coefficient of −0.2 dB at 0.31THz, a −10 dB bandwidth of 25 GHz, and a Q-factor of 12.4. The obtained Q-factor exceeds that of conventional single-layerplanar cross-shaped structures, indicating enhanced spectral selectivity. A reflection coefficient of −24 dB confirms effectiveimpedance matching. Continuous resonance tuning across the 0.28–0.38 THz range is achieved through geometric parametervariation without degradation of spectral characteristics. Simulations were conducted using CST Microwave Studio andvalidated with HFSS. The proposed structure serves as a compact spectral selection component for integration into THz-basedbiomolecular spectroscopy and diagnostic systems. Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Revision requested 09 Mar, 2026 Editor assigned by journal 07 Mar, 2026 Submission checks completed at journal 07 Mar, 2026 First submitted to journal 06 Mar, 2026 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-9048281","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":602837851,"identity":"08e53033-5cce-4154-a9bb-7b1b8a4b8b21","order_by":0,"name":"Anitha George","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAABC0lEQVRIiWNgGAWjYFACxgZmOPsDQlgCn5bGZjhzBohkI6iFgRGuhZkHoQU34J/d3P64oKZWjl/6+MXHNjWH7fnnNzB++MFgkYdLi8Sdg43NM44dN5bsyyk2zjl2OHHGMQZmyR4GiWKc1txIbGzmYTuWuOEMT5p0bsPhBIZjDAzSQLMSG3DokAdr+XesHqgl/bdlw2F7eaAtv/FpMQBp4W2rSTA4w36MmbHhMOOGYwxseG0xBGqZzdt3wHBmDw/QC8fSEzceS2yz7DHArUXuRvqDzzzf6uT5edgffvhRY20vd/jw4Rs/KupwaoGCw0DMYwDlMAIVG+BRDAF1QMz+gKCyUTAKRsEoGJkAAFIOWHeR8JS2AAAAAElFTkSuQmCC","orcid":"","institution":"Cochin University of Science and Technology","correspondingAuthor":true,"prefix":"","firstName":"Anitha","middleName":"","lastName":"George","suffix":""},{"id":602837852,"identity":"cbc703a9-fe5d-4309-8374-dbe44d81bf2a","order_by":1,"name":"Abdulla P","email":"","orcid":"","institution":"Cochin University of Science and Technology","correspondingAuthor":false,"prefix":"","firstName":"Abdulla","middleName":"","lastName":"P","suffix":""}],"badges":[],"createdAt":"2026-03-06 08:53:27","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-9048281/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-9048281/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":104782276,"identity":"8eff9f18-00cd-4dc4-8974-2a7a66366ad6","added_by":"auto","created_at":"2026-03-17 07:57:05","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":653082,"visible":true,"origin":"","legend":"","description":"","filename":"Thzbandpassfilter2.pdf","url":"https://assets-eu.researchsquare.com/files/rs-9048281/v1_covered_93a94681-c6cb-4a40-be74-25cb9b93548e.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Fan Shaped THz Frequency Selective Surface for Narrowband Biomolecular Fingerprint Spectroscopy","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"optical-and-quantum-electronics","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"oqel","sideBox":"Learn more about [Optical and Quantum Electronics](https://www.springer.com/journal/11082)","snPcode":"11082","submissionUrl":"https://submission.nature.com/new-submission/11082/3","title":"Optical and Quantum Electronics","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"","lastPublishedDoi":"10.21203/rs.3.rs-9048281/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-9048281/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"A high-Q fan-shaped metasurface bandpass filter operating in the terahertz (THz) regime is presented for narrowbandbiomolecular fingerprint spectroscopy. 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