Integration of a single photon source with a photonic waveguide

Integration of a single photon source with a photonic waveguide | 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 Integration of a single photon source with a photonic waveguide Aurélie Broussier, Muhammad H. Muhammad, Nancy Rahbany, Abdelhamid Hmima, and 6 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7718480/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 06 Mar, 2026 Read the published version in npj Quantum Information → Version 1 posted 9 You are reading this latest preprint version Abstract The integration of a single photon source based on a solid-state emitter with a photonic structure remains to this day a challenging operation. It is however of prime importance to do so for quantum technologies where single photon sources constitute building blocks for many technologies and in particular for quantum photonics. In this work, we demonstrate a new way of integrating a single photon source, in our case made of a single colloidal semiconductor nanocrystal, with a photonic structure made of a glass waveguide obtained by the ion-exchange technique. Using surface functionalisation and a secondary waveguide of titanium dioxide made by electron-beam lithography, we manage to couple single photons coming from the emitter to the optical waveguide. We observe that the single photon character is preserved and demonstrates a Purcell factor of 1.2. Even though this configuration is not an optimum one, a coupling efficiency of more than 25 % is expected, compared to around 1 to 2 % we obtain for simply positioning the nanocrystal on top of the waveguide alone. The optical waveguide is then pigtailed to an optical fibre to demonstrate a first proof of principle of an integrated single photon source at room temperature. Physical sciences/Optics and photonics Physical sciences/Physics Full Text Additional Declarations No competing interests reported. Supplementary Files articleIEWQDSIv14bis.docx Cite Share Download PDF Status: Published Journal Publication published 06 Mar, 2026 Read the published version in npj Quantum Information → Version 1 posted Editorial decision: Revision requested 18 Nov, 2025 Reviews received at journal 09 Nov, 2025 Reviews received at journal 05 Nov, 2025 Reviewers agreed at journal 30 Oct, 2025 Reviewers agreed at journal 29 Oct, 2025 Reviewers invited by journal 28 Oct, 2025 Editor assigned by journal 07 Oct, 2025 Submission checks completed at journal 07 Oct, 2025 First submitted to journal 26 Sep, 2025 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. 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