Orbital chiral lasing in twisted bilayer metasurfaces

Orbital chiral lasing in twisted bilayer metasurfaces | 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 Orbital chiral lasing in twisted bilayer metasurfaces Chao Peng, Mingjin Wang, Nianyuan Lv, Zixuan Zhang, Ye Chen, Jiahao Si, and 8 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7424101/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 12 Mar, 2026 Read the published version in Nature Communications → Version 1 posted You are reading this latest preprint version Abstract Chirality is a fundamental concept in physics that underpins various phenomena in nonlinear optics, quantum physics, and topological photonics. Althoughthe spin of a photon naturally brings chirality, orbital angular momentum canalso become chirally active in the structures with a broken mirror symmetry.Here, we observe orbital chiral lasing from a twisted bilayer photonic structure leveraging its inherent structural chirality. Specifically, we design andfabricate a Moire-type optical structure by bonding and rotating two separatesemiconductor membrane metasurfaces. We achieve single-mode lasing overa broad spectral range of 250 nm by optically pumping the twisted structure.The lasing emission exhibits orbital chiral characteristics, arising from helicaland non-Hermitian couplings between clockwise and counter-clockwise rotating collective guided resonances, confirmed by polarization-resolved imagingand self-interference patterns. Our results provide the first observation oforbital chiral lasing in twisted photonics, and they can contribute to diverseapplications of chiral light in diagnostics, optical manipulation, and communication with light. Physical sciences/Optics and photonics/Lasers, LEDs and light sources/Semiconductor lasers Physical sciences/Optics and photonics/Optical physics/Nanophotonics and plasmonics Full Text Additional Declarations There is NO Competing Interest. Supplementary Files SupplementaryInformation.pdf Supplementary Information - Orbital chiral lasing in twisted bilayer metasurfaces video25m.mp4 The position of the lasing mode stayed stationary despite the movement of the sample Cite Share Download PDF Status: Published Journal Publication published 12 Mar, 2026 Read the published version in Nature Communications → 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. 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-7424101","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":509027480,"identity":"3e5d299b-c975-41e7-913f-ee0603014505","order_by":0,"name":"Chao 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