Unidirectional Raman emissions of Stokes photons via chiral atom-photon coupling in a ring cavity

Unidirectional Raman emissions of Stokes photons via chiral atom-photon coupling in a ring cavity | 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 Unidirectional Raman emissions of Stokes photons via chiral atom-photon coupling in a ring cavity Hai Wang, haole jiao, Minjie Wang, Jiajin Lu, Can Sun, Zhifang Yang, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5828047/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 In the presented experiment, we demonstrated unidirectional Raman emission from 87 Rb atoms in a ring cavity. A bias magnetic field B 0 is applied along z-direction to define the quantum axis. By transversely applying write laser pulses to drive a π-transition of the atoms, we generate spontaneous Raman emissions of Stokes photons from a chiral (σ + ) transition. The emissions are coupled into the clock-wise (z-direction) and counter-clock-wise modes (-z-direction) of a running-wave cavity, respectively. We reveal spin-momentum correlation in the Stokes emissions. The Stokes emissions constrained to the spin-momentum correlation are found to be a violation of the Kirchhoff’s law of thermal radiation. Thus, we demonstrated that the Stokes emissions can propagate along the clock-wise or counter-clock-wise mode via polarization dissipation based on the spin-momentum correlation. The directional factor is up to 1500:1. Physical sciences/Optics and photonics/Optical physics/Quantum optics Physical sciences/Physics/Optical physics/Single photons and quantum effects Physical sciences/Physics/Quantum physics/Single photons and quantum effects non-reciprocity interaction between atoms and photons spin-momentum correlation unidirectional Raman emission violation of Kirchhoff law Full Text Additional Declarations There is NO Competing Interest. Supplementary Files Supplementarymaterial.docx 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. 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-5828047","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":405194739,"identity":"d842f30f-a1fd-4304-a022-c26815ed7564","order_by":0,"name":"Hai 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