A Multifunctional Terahertz Metadevice Enabled by Single-Layer VO2 : From Ultra-Broadband to Dual-Narrowband Perfect Absorption

A Multifunctional Terahertz Metadevice Enabled by Single-Layer VO2 : From Ultra-Broadband to Dual-Narrowband Perfect Absorption | 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 A Multifunctional Terahertz Metadevice Enabled by Single-Layer VO 2 : From Ultra-Broadband to Dual-Narrowband Perfect Absorption Yong Ma, Jie Sheng, Mu Zhou, Jehan Akbar, Jikun Zang, Jie Deng This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9313973/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 9 You are reading this latest preprint version Abstract Terahertz (THz) metamaterial absorbers are critical for imaging, stealth and communication applications, yet it remains a key challenge to realize reversible switching between ultra-broadband and dual-narrowband perfect absorption in a single compact device. Here, we propose a switchable THz metamaterial absorber enabled by a single vanadium dioxide (VO₂) layer, which achieves flexible mode switching via the insulator-metal phase transition of VO₂. When VO₂ is in the metallic state, the absorber realizes over 90% absorption in 4.10-12.58 THz, with an absolute bandwidth of 8.48 THz and a relative bandwidth of 101.67%, as well as excellent polarization insensitivity and wide incident angle tolerance. When VO₂ is in the insulating state, it achieves dual-narrowband perfect absorption at 4.69 THz and 11.51 THz, with peak absorption rates up to 99.6% and 99.9%, respectively. The absorption mechanism is systematically analyzed via impedance matching theory and geometric parameter optimization. This work provides a simple and effective design strategy for multifunctional THz devices, with broad application prospects in THz imaging, stealth and intelligent communication systems. Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Revision requested 23 Apr, 2026 Reviews received at journal 23 Apr, 2026 Reviewers agreed at journal 22 Apr, 2026 Reviews received at journal 13 Apr, 2026 Reviewers agreed at journal 08 Apr, 2026 Reviewers invited by journal 06 Apr, 2026 Editor assigned by journal 04 Apr, 2026 Submission checks completed at journal 04 Apr, 2026 First submitted to journal 03 Apr, 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. 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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-9313973","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":619664773,"identity":"76f5fb79-4e1a-4eef-bf5e-82a0815ed7ee","order_by":0,"name":"Yong 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