Cavity-less Brillouin strong coupling in a solid-state continuous system

Cavity-less Brillouin strong coupling in a solid-state continuous system | 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 Cavity-less Brillouin strong coupling in a solid-state continuous system Birgit Stiller, Laura Blázquez Martínez, Changlong Zhu This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7152395/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 Strongly coupling two systems allows them to exchange coherent information before the systems decohere. This important regime in light-matter interactions has predominantly been reached in optical resonator configurations. In this work, we present the experimental realization of strong coupling between optical and acoustic fields within a continuum of modes in a cavity-less configuration after a single-pass through an optical waveguide. The underlying physical effect of anti-Stokes Brillouin-Mandelstam scattering in a highly nonlinear fiber at T = 4 K allows us to experimentally demonstrate strong coupling in a waveguide scenario. We show the splitting of the optoacoustic spectral response and introduce a novel technique to measure the avoided crossing of hybrid optoacoustic modes via forced detuning. This demonstration opens a path towards in-line acoustic-waves-based quantum signal processing in waveguide systems. Physical sciences/Optics and photonics/Optical physics/Quantum optics Physical sciences/Physics/Optical physics/Nonlinear optics Full Text Additional Declarations There is NO Competing Interest. Supplementary Files StrongCouplingSupplmat.pdf Supplementary material 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. 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-7152395","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":502421799,"identity":"50e2dc04-9d14-4ee5-b198-c3fcf343512d","order_by":0,"name":"Birgit Stiller","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAABE0lEQVRIie3RMUvDQBQH8Hc8vFtSXG/pdwgUjEIwH8QlQegW6EeIBDoFszbfotBBBMErBx31A9xSEcTRbkEy+C4dqsOlq9D7D0e45Md7fwLg4/MPEyIdqX1CvFMAMYDYv2HFICETICuITMkeI/1pCfREHyeRGL1/vrWQJILI7un1JkI4W82+YVw7yFUpLi5psayixdaLD5M/lsBNcw+TxjEm1JyHRFLbRQfK5EtNZFRBtlTDJOlJp14O5NlNcEuE2cU0KLUnQUtTnF04h3Qqs0pTl0rdUhc2N00hJwvHlOh8g7s2jhNR6/W2Vdf5gyg3ZtbF49pRn8IlgPy1Kv0RZHPp/J6CX3/b2SvohoSPj4/PieUHkKpe98FBFlQAAAAASUVORK5CYII=","orcid":"https://orcid.org/0000-0002-9868-9998","institution":"Max Planck Institute for the Science of Light","correspondingAuthor":true,"prefix":"","firstName":"Birgit","middleName":"","lastName":"Stiller","suffix":""},{"id":502421800,"identity":"50c4a34b-adc9-4855-8825-ef544f9f24dd","order_by":1,"name":"Laura Blázquez Martínez","email":"","orcid":"","institution":"Max Planck Institute for the Science of Light","correspondingAuthor":false,"prefix":"","firstName":"Laura","middleName":"Blázquez","lastName":"Martínez","suffix":""},{"id":502421801,"identity":"bc18e9e1-df5d-425f-ab8c-71cc8d699201","order_by":2,"name":"Changlong Zhu","email":"","orcid":"","institution":"Max Planck Institute for the Science of Light","correspondingAuthor":false,"prefix":"","firstName":"Changlong","middleName":"","lastName":"Zhu","suffix":""}],"badges":[],"createdAt":"2025-07-17 22:20:56","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-7152395/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-7152395/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":95800510,"identity":"73e833d5-8150-4d88-b9ae-104965397c8e","added_by":"auto","created_at":"2025-11-13 08:22:46","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1411735,"visible":true,"origin":"","legend":"Article File","description":"","filename":"StrongCouplingpapermainonly.pdf","url":"https://assets-eu.researchsquare.com/files/rs-7152395/v1_covered_0298b850-f383-42eb-96dc-9cbc1124f0ea.pdf"},{"id":95722209,"identity":"c2738d8e-1953-44b0-967f-ef8ecae04975","added_by":"auto","created_at":"2025-11-12 09:42:02","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"supplement","size":4404880,"visible":true,"origin":"","legend":"Supplementary material","description":"","filename":"StrongCouplingSupplmat.pdf","url":"https://assets-eu.researchsquare.com/files/rs-7152395/v1/9dead5dfbc70f9f2d018a927.pdf"}],"financialInterests":"There is \u003cb\u003eNO\u003c/b\u003e Competing Interest.","formattedTitle":"Cavity-less Brillouin strong coupling in a solid-state continuous system","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":true,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"nature-portfolio","isNatureJournal":true,"hasQc":false,"allowDirectSubmit":false,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"","title":"Nature Portfolio","twitterHandle":"","acdcEnabled":false,"dfaEnabled":false,"editorialSystem":"ejp","reportingPortfolio":"","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"","lastPublishedDoi":"10.21203/rs.3.rs-7152395/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-7152395/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"Strongly coupling two systems allows them to exchange coherent information before the systems decohere. 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