Absorbing Exceptional Point of Coherent Vortex Beams

Absorbing Exceptional Point of Coherent Vortex Beams | 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 Absorbing Exceptional Point of Coherent Vortex Beams Yong Li, Hua Ding, Quansen Wang, Xu Wang This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7674170/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted You are reading this latest preprint version Abstract Coherent perfect absorption at exceptional point (CPA-EP) is of great interest in wave systems for its unique absorption behavior. However, most CPA-EPs achieved so far are confined to plane-wave systems, limiting their versatility. Here, we realize CPA-EPs in chiral spaces via topological vortex beams, using metamaterials with tailored symmetry. We show that chiral CPA-EPs arise from the delicate interplay of mode channels encoding different topological charges (TCs), and TC channels supported by orbital angular momentum significantly boost the channel capacity of CPA-EPs. Notably, through rotational operations, the chiral system enables dynamic switching of absorption capacity and state transformation of CPA-EPs, in which the introduced geometric phase provides a crucial route for enhancing sensitivity via lower-order EPs. Crucially, we further demonstrate the unique coexistence of sensitivity (in EP state) and robustness (in CPA state) within the chiral space. Our findings broaden CPA-EP research and enable advanced devices on chiral wave systems. Physical sciences/Physics/Applied physics/Acoustics Physical sciences/Physics/Condensed-matter physics/Phase transitions and critical phenomena Coherent perfect absorption Exceptional point conversion Sensitivity enhancement Chiral waves Full Text Additional Declarations There is NO Competing Interest. Supplementary Files Supplementary.pdf Supplementary Information for ”Absorbing Exceptional Point of Coherent Vortex Beams” Cite Share Download PDF Status: Under Review 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. 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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-7674170","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":521171404,"identity":"ef354a60-d4d8-4b6b-b340-afd0e0c53f97","order_by":0,"name":"Yong 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