Electrically Controlled Spatial Light Modulator for Ultrawideband Hyperspectral Terahertz Single-Pixel Imaging

Electrically Controlled Spatial Light Modulator for Ultrawideband Hyperspectral Terahertz Single-Pixel Imaging | 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 Article Electrically Controlled Spatial Light Modulator for Ultrawideband Hyperspectral Terahertz Single-Pixel Imaging Yiwen Sun, Xudong Liu, Wenjing Ma, Chuanfu Sun, Emma Pickwell-MacPherson, and 5 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9001286/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Terahertz (THz) spectroscopic imaging offers significant potential due to its non-destructive penetration and spectral fingerprinting capabilities. However, existing systems face limitations such as high cost, slow acquisition speed, and limited bandwidth, particularly due to the reliance on non-electrical modulators or expensive detector arrays. Here, we present the first electrically controlled spatial light modulator (SLM) for ultrawideband terahertz hyperspectral single-pixel imaging. Our device, based on a non-resonant GaAs Schottky microslit array, provides direct electrical control over both amplitude and phase modulation across a bandwidth of 0.2-1.4 THz. This design offers a compact, low-cost, and highly integrable solution. Utilizing a 100-pixel array operating at ~3.4 kHz, we demonstrated hyperspectral imaging and depth-resolved 3D reconstruction using a single photoconductive detector in both transmission and reflection modes, achieving a frame acquisition time of approximately 9 seconds. This integration of electrically tunable modulation with ultrabroad bandwidth establishes a new paradigm for terahertz imaging, paving the way for applications in biomedical diagnostics, chemical identification, multilayer inspection, and security screening. Physical sciences/Optics and photonics/Other photonics Physical sciences/Physics/Electronics, photonics and device physics/Photonic devices Full Text Additional Declarations There is no conflict of interest Supplementary Files SupplementaryInformation.docx Electrically Controlled Spatial Light Modulator for Ultrawideband Hyperspectral Terahertz Single-Pixel Imaging Cite Share Download PDF Status: Posted Version 1 posted 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. 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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-9001286","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":599022821,"identity":"663e3131-3da9-4776-a018-6a765bc5af9d","order_by":0,"name":"Yiwen 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